Advance Java MCQ questions
Chapter
1
1.Which of these package
contains classes and interfaces for networking?
a) java.io
b) java.util
c) java.net
d) java.network
2. Which of these is a protocol for breaking
and sending packets to an address across a network?
a)
TCP/IP
b)
DNS
c)
Socket
d)
Proxy Server
3. How many ports of TCP/IP are reserved for
specific protocols?
a)
10
b) 1024
c)
2048
d)
512
4. How many bits are in a single IP address?
a) 8
b) 16
c)
32
d) 64
5. Which of these class is used to encapsulate
IP address and DNS?
a) DatagramPacket
b) URL
c)
InetAddress
d) ContentHandler
Chapter 2
1.Which
of the below is not a valid design pattern?
a) Singleton
b) Factory
c) Command
d) Java
2.Which
of the below is not a valid classification of design pattern?
a) Creational patterns
b) Structural patterns
c) Behavioural patterns
d) Java
patterns
3.
Which design pattern ensures that only one object of particular class gets
created?
a)
Singleton pattern
b) Filter pattern
c) State pattern
d) Bridge pattern
4. Which design pattern
suggest multiple classes through which request is passed and multiple but only
relevant classes carry out operations on the request?
a) Singleton pattern
b)
Chain of responsibility pattern
c) State pattern
d) Bridge pattern
5.
Which design pattern represents a way to access all the objects in a
collection?
a)
Iterator pattern
b) Facade pattern
c) Builder pattern
d) Bridge pattern
Chapter 3
1) In RMI
Architecture which layer Intercepts method calls made by the client/redirects
these calls to a remote RMI service?
a. Stub &
Skeleton Layer
b. Application Layer
c. Remote Reference Layer
d. Transport Layer
2) Which is an
object, acts as a gateway for the client side, all the outgoing requests are
routed through it and it resides at the client side and represents the remote
object?
a. Stub
b. Skeleton
c. Both A & B
d. None of the above
3) Java supports
RMI, RMI Stands for?
a. Random Method Invocation
b. Remote Memory Interface
c. Remote Method
Invocation
d. Random Method Invocation
4) An RMI Server
is responsible for _______
a. Creating an instance of
the remote object
b. Exporting the remote
object
c. Binding the instance of
the remote object to the RMI registry
d. All mentioned
above
5) Abbreviate
the term DGC?
a. Digital Garbage
Collection
b. Distributed
Garbage Collection
c. Distributed Garbage
Connection
d. None of the above
Chapter1
1. Which of
these class is used to encapsulate IP address and DNS?
a) DatagramPacket
b) URL
c) InetAddress
d) ContentHandler
2. What is the output of this
program?
1.
import java.net.*;
2.
class networking
3.
{
4.
public static void main(String[] args) throws UnknownHostException
5.
{
6.
InetAddress obj1 = InetAddress.getByName("sanfoundry.com");
7.
InetAddress obj2 = InetAddress.getByName("sanfoundry.com");
8.
boolean x = obj1.equals(obj2);
9.
System.out.print(x);
10.
}
11.
}
a)0
b)1
c)true
d) false
3. What
is the output of this program?
1. import java.net.*;
2. public class networking
3. {
4. public static void main(String[] args) throws UnknownHostException
5. {
6. InetAddress obj1 = InetAddress.getByName("cisco.com");
7. InetAddress obj2 = InetAddress.getByName("sanfoundry.com");
8. boolean x = obj1.equals(obj2);
9. System.out.print(x);
10. }
11. }
a)0
b)1
c)true
d) false
4. What
is the output of this program?
1. import java.io.*;
2. import java.net.*;
3. public class URLDemo
4. {
5. public static void main(String[] args)
6. {
7. try
8. {
9. URL url=new URL("https://www.sanfoundry.com/java-mcq");
10. System.out.println("Protocol: "+url.getProtocol());
11. System.out.println("Host Name: "+url.getHost());
12. System.out.println("Port Number: "+url.getPort());
13. } catch(Exception e){System.out.println(e);}
14. }
15. }
a)Protocol:http
b)HostName:www.sanfoundry.com
c)PortNumber:-1
d) all of the mentioned
5. What
is the output of this program?
1. import java.net.*;
2. class networking
3. {
4. public static void main(String[] args) throws UnknownHostException
5. {
6. InetAddress obj1 = InetAddress.getByName("cisco.com");
7. System.out.print(obj1.getHostName());
8. }
9. }
a)cisco
b)cisco.com
c)www.cisco.com
d) none of the mentioned
Chapter 2
1.Integer.valueOf is an example
of Factory pattern.
A).false
B). true
2. Which of the following describes the Proxy pattern correctly?
A - In this pattern a class represents functionality
of another class.
B - This pattern
creates a chain of receiver objects for a request.
C - This pattern
provides a way to evaluate language grammar or expression.
D - In this pattern a
request is wrapped under an object as command and passed to invoker object.
3.
Which type of design patterns concern class and object composition?
A - Creational Design Patterns
B - Structural Design
Patterns
C - Behavioral Design
Pattern
D - J2EE Design
Patterns
4.Which
of the following pattern is used where we need to treat a group of objects in
similar way as a single object?
A - Composite Pattern
B - Facade Pattern
C -
Flyweight Pattern
5.design pattern is a logical concept ?
a)True
b) False
Chapter 3
1) RMI and EJB,
provides services to access an object running in another JVM (known as remote
object).
a. True
b. False
2) In RMI, the
objects are passed by _____.
a. Value
b. Reference
c. Value and Reference
d. None of the above
3) RMI uses a
layered architecture; each of the layers could be enhanced or replaced without
affecting the rest of the system.
a. True
b. False
4) What are the
exceptions which have to be handled in a RMI client program?
a. RemoteException
b. NotBoundException
c. MalFormedURLException
d. All mentioned
above
5) RMI is a
server-side component; It is not required to be deployed on the server.
a. True
b. False
FS17CO002
Chapter
1
1) URL is an
acronym for?
a. Uniform
Resource Locator
b. Unified Resource Locator
c. Uniform Restore Locator
d. Unified Restore Locator
2) URL stands
for Uniform Resource Locator and represents a resource on the World Wide Web,
such as a Web page or FTP directory.
a. True
b. False
3) Which class
is used to create servers that listen for either local client or remote client
programs?
a. ServerSockets
b. httpServer
c. httpResponse
d. None of the above
4) Which
constructor of DatagramSocket class is used to creates a datagram socket and
binds it with the given Port Number?
a. DatagramSocket(int port)
b. DatagramSocket(int
port, InetAddress address)
c. DatagramSocket()
d. None of the above
5) Which methods
are commonly used in ServerSocket class?
a. public OutputStream
getOutputStream()
b. public Socket
accept()
c. public synchronized void
close()
d. None of the above
Chapter 2
1. What
does MVC pattern stands for?
a) Mock View Control
b)
Model view Controller
c) Mock View Class
d) Model View Class
2.
Which design pattern works on data and action taken based on data provided?
a)
Command pattern
b) Singleton pattern
c) MVC pattern
d) Facade pattern
3. Which
of the following is correct about Behavioral design patterns.
A - These design patterns are specifically concerned
with communication between objects.
D -
None of the above.
4. Which of the following describes the Observer pattern
correctly?
B - This pattern is used to
reduce communication complexity between multiple objects or classes.
C - This pattern is used to
restore state of an object to a previous state.
5.
Which of the following describes the Business Delegate pattern correctly?
B - This pattern is used to
separate application's concerns.
C - This pattern is used to decouple presentation tier
and business tier.
D - This pattern is used in
EJB persistence mechanism.
Chapter 3
1) Which package
is used for Remote Method Invocation (RMI)?
a. java.lang.rmi
b. java.lang.reflect
c. java.applet
d. java.rmi
2) Which program
obtains a remote reference to one or more remote objects on a server and then
invokes methods on them in an RMI application?
a. Server
b. Client
c. Both A & B
d. None of the above
3) Which objects
are used by RMI for communicating with the remote object?
a. Stub
b. Skeleton
c. Both A &
B
d. None of the above
4) RMI
Architecture consists of how many layers?
a. 5
b. 3
c. 4
d. 2
5) Which method
in naming class specifies a name to the remote object?
a. bind(string
name)
b. rebind(string name)
c. Both A & B
d. None of the above
FS17CO004
Chapter 1
1) Which classes
are used for connection-less socket programming?
a. DatagramSocket
b. DatagramPacket
c. Both A &
B
d. None of the above
2) Which method
of URL class represents a URL and it has complete set of methods to manipulate
URL in Java?
a. java.net.URL
b. java.net.URLConnection
c. Both A & B
d. None of the above
3) Which class
is used to create servers that listen for either local client or remote client
programs?
a. ServerSockets
b. httpServer
c. httpResponse
d. None of the above
4) Which package
provides core functionality?
a. java.net
b. java.rmi
c. java.lang
d. java.math
5) The
DatagramSocket and DatagramPacket classes are not used for connection-less
socket programming.
a. True
b. False
Chapter 2
1.Which
of the following describes the Service Locator pattern correctly?
D - This pattern is used when we want to locate
various services using JNDI lookup.
2.
Which of the following describes the Transfer Object pattern correctly?
3. Which type of
design patterns concern class and object composition?
A - Creational Design
Patterns
B - Structural Design Patterns
4. Which
of the following is the correct list of entities of Transfer Object pattern?
A - Business Object , Transfer Object, Client
B - Service, Context,
Service Locator, Cache, Client
D - Service, Service
Locator, Client
5. Which of the following pattern refers to
creating duplicate object while keeping performance in mind?
A. Builder Pattern
B. Bridge Pattern
C. Prototype
Pattern
D. Filter Patter
Chapter
3
1) 1099 is the
default port used by RMI Registry.
a. True
b. False
2) Which is a
one-way communication only between the client and the server, which is not only
a reliable but also there is no confirmation regarding reaching the message to
the destination?
a. TCP/IP
b. UDP
c. Both A & B
d. None of the above
3) RMI uses
which protocol on top of TCP/IP (an analogy is HTTP over TCP/IP)?
a. Java Remote
Method Protocol (JRMP)
b. Internet Inter-ORB
Protocol (IIOP)
c. Jinni Extensible Remote
Invocation (JERI)
d. All mentioned above
4) Which method
of the Naming class (found in java.rmi) is used to update the RMI registry on
the server machine?
a. rebind ()
b. lookup()
c. Both A & B
d. None of the above
5) What is the
built on top of the socket programming?
a. EJB
b. RMI
c. Both A & B
d. None of the above
FS17CO005
Chapter
1
1) Give the
abbrevation of BSD.
a. Berkeley
Software Distribution
b. Berkeley Socket
Distribution
c. Berkeley System
Distribution
d. None of the above
2) The client in
socket programming must know which informations?
a. IPaddress of Server
b. Port number
c. Both A &
B
d. None of the above
3) The
URLConnection class can be used to read and write data to the specified
resource referred by the URL
a. True
b. False
4) Datagram is
basically an information but there is no guarantee of its content, arrival or
arrival time.
a. True
b. False
5) What does the
java.net.InetAddress class represent?
a. Socket
b. IP Address
c. Protocol
d. MAC Address
Chapter 2
1. Which
Design Pattern should you use when you want to use an existing class, and its
interface does not match the one you need.
a) Adapter
b)
Decorator
c) Mediator
d) Proxy
2. Which
Design Pattern should you use when a set of objects communicate in well-defined
but complex ways. The resulting interdependencies are unstructured and
difficult to understand
a)
Façade
b)
Factory Method
c)
Template Method
d)
Mediator
3. Which
Design Pattern should you use when a system should be configured with one of
multiple families of products
a)
Builder
b) Abstract Factory
c)
Factory Method
d)
Composite
4.
Which Design Pattern should you use when When an object should be able to
notify other objects without making assumptions about who these objects are. In
other words, you don't want these objects tightly coupled.
a) Visitor
b) Adapter
c) Observer
d) Chain Of Responsibility
5. Which
Design Pattern should you use when a system should be independent of how its
products are created, composed, and represented; and when the classes to
instantiate are specified at run-time, for example, by dynamic loading
a)
Prototype
b) Façade
c) Abstract Factory
d) Flyweight
Chapter
3
1) In RMI which
layer defines and supports the invocation semantics of the RMI connection and
this layer maintains the session during the method call?
a. The Stub & Skeleton
Layer
b. The Application Layer
c. The Remote
Reference Layer
d. The Transport Layer
2) In RMI
Distributed object applications need to
a. Locate remote objects
b. Communicate with remote
objects
c. Load class definitions
for objects that are passed around
d. All mentioned
above
3) RMI allows an
object to invoke methods on an object running in another JVM
a. True
b. False
4) An RMI Server is
responsible for,
a) Creating an instance of the remote
object
b) Exporting the remote object
c) Binding the instance of the remote
object to the RMI registry
d) All mentioned above
5) In RMI Distributed object
applications need to do?
a) Locate remote objects
b) Communicate with remote objects
c) Load class definitions for objects
that are passed around
d) All mentioned above
FS17CO008
Chapter
1
1) The flush()
method of PrintStream class flushes any uncleared buffers in memory
a. True
b. False
2) TCP,FTP,Telnet,SMTP,POP
etc. are examples of ?
a. Socket
b. IP Address
c. Protocol
d. MAC Address
3) Which steps
occur when establishing a TCP connection between two computers using
sockets?
a. The server instantiates a
ServerSocket object, denoting which port number communication is to occur on
b. The server invokes the
accept() method of the ServerSocket class. This method waits until a client
connects to the server on the given port
c. After the server is
waiting, a client instantiates a Socket object, specifying the server name and
port number to connect to
d. All of the
above
4) In
InetAddress class which method returns the host name of the IP Address?
a. public String
getHostName()
b. public String
getHostAddress()
c. public static InetAddress
getLocalHost()
d. None of the above
5) The DatagramSocket and
DatagramPacket classes are not used for connection-less socket programming.
A) True
B) False
Chapter 2
1.Define the skeleton of an algorithm in an
operation, deferring some steps to subclasses. It lets subclasses redefine
certain steps of an algorithm without changing the algorithm structure.
A. Chain of responsibility
B. Template method
C. Interpretor
D. Prototype
2. Which design pattern provides a
single class which provides simplified methods required by client and delagates
call to those methods?
A. Adapter pattern
B. Builder pattern
C. Facade pattern
D. Prototype pattern
3. In which of the following
pattern, a visitor class is used which changes the executing algorithm of an
element class?
A. Visitor Pattern
B. MVC Pattern
C. Business Delegate Pattern
D. Composite Entity Pattern
4. Which of the following Chooses and
standardizes patterns for a problem domain promotes software reuse and, hence,
quality and productivity?
A. Promoting Communication
B. Streamlining Documentation
C. Increasing Development Efficiency
D. Supporting Software
Reuse
5. . Attach
additional responsibilities to an object dynamically.It provides a flexible
alternative to subclassing for extending functionality.
A. Chain of responsibility
B. Adapter
C. Decorator
D. Composite
Chapter
3
1) In RMI program the following example shows the,
import java.rmi.*;
public interface Adder extends Remote{
public int add(int x,int y)throws RemoteException;
}
A) Create and start the remote
application
B) Create and start the client
application
C) Create the remote
interface
D) Provide the implementation of the
remote interface
2) In RMI program the following two steps are used to,
Either extend the UnicastRemoteObject
class,
the exportObject() method of the
UnicastRemoteObject class,
A) Provide the
Implementation of the remote interface
B) Create the remote interface
C) Create and start the remote
application
D) Compile the implementation class and
create the stub and skeleton objects using the rmic tool
3) RMI uses a layered architecture; each of the layers could be enhanced
or replaced without affecting the rest of the system?
A) True
B) False
4) When the skeleton receives the incoming request, it does the
following tasks?
A) It reads the parameter for the remote
method
B) It waits for the result
C) It writes and transmits (marshals)
the result to the caller
D) It reads (unmarshals) the return
value or exception
E) Both A & C
5) In RMI which layer defines and supports the invocation semantics of
the RMI connection, this layer maintains the session during the method call?
A) The Stub & Skeleton Layer
B) The Application Layer
C) The Remote Reference
Layer
D) The Transport Layer
FS17CO009
Chapter
1
1.
______ are the advantages of hierarchical routing.
A.
Flexibility
B.
Reliability
C.
Scalability
D.
Portability
E.
None of these
2. One of the following
the java.net Net Address class represents.
A. Socket
B. Protocol
C. IP Address
D. MAC Address
E. All of these
3. ______is the Central
Computer powerful than other computers in the network.
A. Server
B. Hub
C. Client
D. Switch
E. Both A and B
4. TCP groups a number
of bytes together______in a packets.
A. user datagram
B. datagram
C. segment
D. packet
E. None of these
5. one of the following
classes are used for connection-less socket programming?
A. Datagram Socket
B. Datagram Packet
C. Both Datagram Socket
D. Datagram Packet
Chapter
2
1. A pattern
language
A. encompasses a
collection of patterns
B. is implemented using hypertext
C. resembles the structure of natural
languages
D. None of the above
2. Most user interface
design patterns fall with in one of ____ categories of patterns.
A. 5
B. 10
C. 25
D. 100
3. . Which
of the following are levels of design focus that can be used to categorize
WebApp patterns?
A. Behavioral patterns
B. Functional patterns
C. Layout patterns
D. Navigation patterns
E. Both
b and d
4.Which of the following represents The (static) structure and (dynamic)
behavior of the pattern?
A. Name
B. Application
C. Consequences
D. Form
5. Define one to many dependency between objects so that when one
object change state, all its dependent are notified and updated automatically.
A. Chain of responsibility
B. Event Notification
C. Mediator
D. Observer
Chapter
3
1. The UnicastRemoteObject
class provides support for point-to-point active object references using TCP
streams?
a) True
b) False
2. What is Remote method invocation (RMI)?
a) RMI allows us to invoke a method of java object that
executes on another machine.
b) RMI allows us to invoke a method of java object that executes on another
Thread in multithreaded programming.
c) RMI allows us to invoke a method of java object that executes parallely in
same machine.
d) None of the mentioned
3. Which of these methods are member of Remote class?
a) checkIP()
b) addLocation()
c) AddServer()
d) None of the mentioned
4. Which of these Exceptions is
thrown by remote method?
a) RemoteException
b) InputOutputException
c) RemoteAccessException
d) RemoteInputOutputException
5. Which of
these class is used for creating a client for a server-client operations?
a) serverClientjava
b) Client.java
c) AddClient.java
d) ServerClient.java
FS17CO011
Chapter
1
1. one of the following
is a path vector routing?
A. exterior gateway
protocol
B. inter-domain routing
C. network routing
protocol
D. All of these
2. _______is the Machine
that places the request to access the data
A. Client Machine
B. Server Machine
C. Request Machine
D. None of these
3. ______is the default port of SMTP.
A. 25
B. 70
C. 80
D. 85
9. ______ Net Ware protocol provides link-state routing.
A. SAP
B. RIP
C. NLSP
D. NCP
5. one of the following
applications of the Client and Server Model?
A. Email
B. Network Printing
C. World Wide Web
D. All of these
Chapter
2
1. Which of the following is not one of the elements of
a design pattern?
A.
context
B.
environment
C. solution
D.
none of this
2. Define an interface for creating an object, but let the subclasses decide
which class to instantiate. It let the instantiation differ to subclasses.
A. Factory Method
B. Abstract Factory
C. Prototype
D.
Builder
3. Define a family of algorithms, encapsulate each one,
and make them interchangeable. It lets the algorithm vary independently from
clients that use it.
A.
Template method
B. Strategy
C. Visitor
D. Decorator
4. Encapsulate a request as
an object, there by letting you parametrize clients with different requests,
queue or log requests, and support undoable operation.
A. Command
B. Decorator
C. Composite
D.
Adaptor
5.
Which of the following describes
the Facade pattern correctly?
A.
This pattern allows a user to add new functionality to an existing object
without altering its structure
B. This pattern
hides the complexities of the system and provides an interface to the client
using which the client can access the system
C.
This pattern is primarily used to reduce the number of objects created and to
decrease memory footprint and increase performance
Chapter
3
1. Which of these package is used for all the text
related modifications?
a) java.text
b) java.awt
c) java.lang.text
d) java.text.mofify
2. What are the layers of
RMI Architecture?
a. Stub and Skeleton layer
b. Remote Reference Layer.
c. Transport layer
d. All of the mentioned
3. There are minimum three
types of protocol implementations RMI should have?
a. True
b. False
4. RMI-IIOP is a ______
a. Class
b. Interface
c. Protocol
d. None of the mentioned
5. RMI-IIOP supports dynamic
downloading of classes?
a. True
b. False
FS17CO012
Chapter 1
1) Which of these method of DatagramPacket class is used to find the destination address? a) findAddress() b) getAddress() c) Address() d) whois()
2) Which of these is a return type of getAddress method of DatagramPacket class? a) DatagramPacket b) DatagramSocket c) InetAddress d) ServerSocket
3) Which of these is a bundle of information passed between machines? a) Mime b) cache c) Datagrams d) DatagramSocket 4) Which of these class is necessary to implement datagrams? a) DatagramPacket b) DatagramSocket c) All of the mentioned d) None of the mentioned 5) Which of these method of DatagramPacket is used to find the port number? a) port() b) getPort() c) findPort() d) recievePort() Chapter
2
1.
You
design an application for an advertis-ement company, which produces different
sort of publications such as books, articles, leaflets, etc.The
company publishes those products in many media formats such as printed
material, CD, DVD, online websites, etc.How you would model the company
products hierarchy (Publications, Media)?
a)Use composite design pattern to enable the
publication and media hierarchies to be treated in the same way as a single
instance of an object.
b) Use the adapter design pattern to translates publication interface into
a compatible media interface.
c) Use bridge design pattern to
build separate hierarchies for the publications and the media, to decouple the
abstraction from its implementation so that the two can vary independently.
2. Which design pattern you would you use
to decouple an abstraction from its implementation so that the two can vary
independently?
a) Adapter design pattern
b) bridge design pattern
c)
Facade design pattern
d)
Composite bridge design pattern
3. Which pattern is most appropriate when a
decision must be made at the time a class is instantiated?
a) Bridge
b)
Composite
c)
Factory Method
d)
Command
4.
Given
the following scenario:
You
want to create families of related objects, to be used interchangeably to
configure you application. What is the most appropriate GoF pattern to use?
a) Chain
of Responsibility
b) Abstract Factory
c) Builder
d) Observer
5.
It
is also known as Virtual Constructor and it is used to define an interface for
creating an objectbut letting the subclass
decide which class to instantiate, this pattern is :
a) Builder
b)
Abstract Factory
c)
Prototype
d) Factory Method
Chapter
3
1) What is the full-form of IIOP ?
a. Internet Inter ORB
Protocol
b. Internet Inter ORB Packet
c. Install Inter ORB Packet
d. None of the mentioned
2) The Full-form of JERI is
_______
a. Java Extensible Remote
Invocation
b. Jini Extensible Remote
Invocation
c. Java Enterprise Resource
Invocation
d. None of the mentioned
3) The Naming class provides
methods for storing and obtaining references to remote objects in the remote
object registry.
a. True
b. False
4) How to get all the
registered objects in a rmiregistry?
a. Using list method of Naming Class.
b. Using list method of
Unicast Remote Object Class.
c. Both a. and b.
d. None of the mentioned
5) bind method(String name)
binds the specified name to a remote object
a. True
b. False
FS17CO013
Chapter
1
1) Which of these method of DatagramPacket is used to obtain the byte array of data contained in a datagram? a) getData() b) getBytes() c) getArray() d) recieveBytes() 2) Which of these method of DatagramPacket is used to find the length of byte array? a) getnumber() b) length() c) Length() d) getLength() 3) Which of these class must be used to send a datatgram packets over a connection? a) InetAdress b) DatagramPacket c) DatagramSocket d) All of the mentioned 4) Which of these method is used to start a server thread? a) run() b) start() c) runThread() d) startThread() 5) Which of these method is called when http daemon is acting like a normal web server? a) Handle() b) HandleGet() c) handleGet() d) Handleget() Chapter
2
1.
You want all the clients using class A to use the same
instance of class A, what should you do to achieve this goal?
a) mark class A final
b) mark class A abstract
c)
apply the Singleton
pattern to class A
d)
apply the Memento pattern to class A
2. Which pattern to use when
more than one object can handle a request, and the handler is unknown?
a)
Chain of Responsibility
b) Command
c) Strategy
d) Observer
3.
Which is considered an
example of Chain of Responsibility Pattern?
a) java.awt.event.ComponentAdapte
b)
The Java Servlet filter framework
c) javax.jms.QueueConnectionFactory
d) java.awt.Toolkit
4.
It is known as Action or Transaction and is used to
encapsulate a request as an object to support rollback, logging, or transaction
functionality
a) Chain of Responsibility Pattern
b) Command
Pattern
c) Observer Pattern
d) Strategy Pattern
5.
java.util.Enumeration is an example of which pattern?
a)
Iterator
b)
Command
c)
Observer
d)
Strategy
Chapter
3
1) A bean consists of general purpose
interfaces are:
A. Properties
B. Events
C. Methods
D. All of these
2) CORBA is stands for:
A. Common oriented request broker architecture
B. Common object request break architecture
C. Common object request broker architecture
D. Common object request broker access
3) The keywords reserved but used in the initial version
of Java are
a. union
b. const
c. inner
d. goto
4) The rmiregistry command creates and starts a remote
object registry on the specified port on the current host.
a. True
b.
False
5) Which one of the following import statement is correct?
a. java.rmi.registry.LocateRegistry
b. java.registry.LocateRegistry
c. java.rmi.Locateregistry
d. None of the mentioned
FS17CO014
Chapter
1
1) Which of these methods of httpd class is used to read data from the stream? a) getDta() b) GetResponse() c) getStream() d) getRawRequest() 2) Which of these method of httpd class is used to get report on each hit to HTTP server? a) log() b) logEntry() c) logHttpd() d) logResponse() 3) Which of these method is used to find a URL from the cache of httpd? a) findfromCache() b) findFromCache() c) serveFromCache() d) getFromCache() 4) Which of these variables stores the number of hits that are successfully served out of cache? a) hits b) hitstocache c) hits_to_cache d) hits.to.cache 5) Which of these class is used for operating on request from the client to the server? a) http b) httpDecoder c) httpConnection d) httpd Chapter
2
1. In the Publish-Subscribe messaging
model, the subscribers register themselves in a topic and are notified when new
messages arrive to the topic. Which pattern does most describe this model?
a) Adapter
b) Notifier
c)
Observer
d)
State
2.
A pattern that is intended to provide a means to define a family of
algorithms and encapsulate each one as an object for interchangeable use:
a) Strategy Pattern
b)
Abstract Factory Pattern
c)
Visitor Pattern
d)
State Pattern
3. What is the difference between an
adapter and a decorator?
a) The
adapter adds no functionalities to the adaptee class, whereas the Decoratorextends the
functionality of the object
b)
The adapter is a creational pattern, whereas the decorator is a
structural design pattern
c) Both introduce a level of indirection between a client class and a
class it uses
4.
Which best defines the use of the Composite Design Pattern?
a)
the
Composite design pattern allows the clients to build a complexobject
of smaller different ones
b)
the Composite
design pattern allows adding and removing functionality dynamically
c) the
Composite design pattern allows the clients to treat individual objects
and compositions uniforml
5.
It is also known as Wrapper, it is used when subclassing is not possible
or practical to add functionality and it is used to add functionality at
runtime. This pattern is :
a)
Composite
b)
Adapter
c) Decorator
d) Proxy
Chapter
3
1) What is the full-form of API?
a. Application Programming Interface
b. Application Programming Industry
c. Automatic Programming Interface
d. None of the above
2) What should be in the empty box ?
a. RMI Registry
b. Naming Class
c. java.io package
d. Exception
3) RMI
facilitates communication between:
a. 2 Java programs
b. 2 JVMs
c. 2 Machines
4) Which of the following acts as a DNS service for
the implementation class objects?
a. Web server
b. Application
server
c. RMI Registry
5) Which of
the following is the tool used to generate the stub and the skeleton?
a. javac.
b. RMI Registry
c. rmic
FS17CO017
Chapter
1
1) Which of these method of httpd class is used to write UrlCacheEntry object into local disk? a) writeDiskCache() b) writetoDisk() c) writeCache() d) writeDiskEntry() 2) Which of these is an instance variable of class httpd? a) port b) cache c) log d) All of the mentioned 3) Which of these is an instance variable of httpd that is a Hashtable? a) port b) cache c) log d) stopFlag4) Which of these exception is thrown by URL class’s constructors? a) URLNotFound b) URLSourceNotFound c) MalformedURLException d) URLNotFoundException 5) Which of these methods is used to know host of an URL? a) host() b) getHost() c) GetHost() d) gethost() Chapter 2 1.
Big
portion of clients are remotely invoking methods in your system, the surface
area exposed to clients includes fine-grained methods, which of course causes
network overhead.Which pattern would improve
your system performance in this case?
a)
Chain of Responsibility Pattern
b) Facade Pattern
c)
Command Pattern
d)
Adapter Pattern
2.
It is a pattern used to minimize memory use by letting similar objects
share as much data as possible stored in a sharable object.
a) Flyweight
b)
Composite
c)
Iterator
d)
Momento
3.
Which
pattern is utilized in this example ?
Every character object in a
word document has data about the graphical representation and the position, but
to avoid redundant graphical representation data for objects to the same
character, it is advisable to extract out these representation data to one
shared object between these objects, and store only the position of each
character internally in each object.
a)
Abstract Factory
b)
Method Factory
c)
Builder
d) Flyweight
4.
What are the consequences of applying the GOF Bridge pattern?
a)
it makes implementing the client code easier by interacting with a
single uniform interface
b) it decouples an abstraction from its implementation so that the two can
vary independently
c) it will decrease the system
extesibility
d) the client code can traverse tree
structures of arbitrary depth recursively
5. When would you use the GOF
Bridge design pattern?
a)
to implement lazy
loading of expensive objects
b)
to improve system reliability and scalability
c) to decouple an abstraction from its implementation so that the two can
vary independently
d) to hide the implementation details from the client code of your design
Chapter 3 1) The process of transmission of parameters passed to a remote method from client to server and vice-versa is called:a. Encoding – decodingb. Parsingc. Marshalling – Unmarshaling
2) How does the client knows about the functionalities accessible using the remote object?a. Using the implementation class code present on client b. Using Stubc. Using skeleton 3) The lease time is controlled by the system property:a. java.rmi.dgc.leaseValueb. rmi.leaseValuec. rmi.dgc,leasePeriod 4) The default lease Period is:a. 10 Minsb. 15 Minsc. 20 Mins 5) For running a RMI program TCP/IP should be active only on the host.
a. True b. False FS17CO018 Chapter 1 1) Which of these class is used to access actual bits or content information of a URL? a) URL b) URLDecoder c) URLConnection d) All of the mentioned 2) Which of these class is used to encapsulate IP address and DNS? a) DatagramPacket b) URL c) InetAddress d) ContentHandler 3) Which of these is wrapper around everything associated with a reply from an http server? a) HTTP b) HttpResponse c) Httpserver d) httpserver 4) Which of these transfer protocol must be used so that URL can be accessed by URLConnection class object? a) http b) https c) Any Protocol can be used d) None of the mentioned 5) Which of these methods is used to know when was the URL last modified? a) LastModified() b) getLastModified() c) GetLastModified() d) getlastModified()() Chapter
2
1.
Which design pattern you would you use to assign more
functionality to an object without sub-classing it?
a)
Bridge design
pattern
b)
Adapter design pattern
c)
Composite design pattern
d) Decorator design
pattern
2.
Which of the following are participants in the GOF
Decorator design pattern?
a)
Abstract Decorato
b)
Virtual Decorator
c)
Concrete Decorator
d)
Component
3.
What are the consequences of applying the GOF Decorator
pattern?
a)
it makes the client code easier by interacting with a
single uniform interface
b)
the client code can traverse tree structures of
arbitrary depth recursively
c)
it will not alter the
class inheritance hierarchy to accommodate for the additional functionality
d)
it allows to nest layers of
decorators to add more functionality
4.
When would you use the GOF Decorator design pattern?
a)
to translates an existing class interface into a
compatible target interface
b)
to assign more functionality to an object without
sub-classing it
c)
to decouple an
abstraction from its implementation so that the two can vary independently
5.
Which design pattern you would you use to decouple the
creation procedure of a complex object from it's concrete instance to be able
to apply that procedure on variety of implementations.
a) Factory builder design pattern.
b) Method Builder design pattern
c) Builder design pattern
d) Factory method design pattern
Chapter
3
1) Stubs and skeletons are to be written by
the programmer.
a. True
b. False
2) The Registry is a continuously running
process on the host.
a. True
b. False
3) How many Exceptions does the
java.rmi.server package include?
a. 6
b. 9
c. 4
d. 2
4) How many interfaces does the
java.rmi.server package include?
a. 6
b. 9
c. 4
d. 2
5) How many classes does the java.rmi.server
package include?
a. 6
b. 9
c. 4
d. 10
FS17CO019
Chapter
1
1) Which of these methods is used to know the type of content used in the URL? a) ContentType() b) contentType() c) getContentType() d) GetContentType() 2) Which of these class is used to access actual bits or content information of a URL? a) URL b) URLDecoder c) URLConnection d) All of the mentioned 3) Which of these data member of HttpResponse class is used to store the response from a http server? a) status b) address c) statusResponse d) statusCode 4) Which of these interface abstractes the output of messages from httpd? a) LogMessage b) LogResponse c) Httpdserver d) httpdResponse 5) Which of these class is used to create servers that listen for either local or remote client programs? a) httpServer b) ServerSockets c) MimeHeader d) HttpResponse Chapter 2 1.
What would lead you to apply the builder design
pattern?
a)
To abstract steps of
construction of objects so that different implementations
b) To translates one
interface for a class into a compatible interface
c) To restrict instantiation of
a class to one object
2.
Which of the following are participants in the builder
design pattern?
a)
Builder interface
b) Constructor Interface
c) Director Interface
d) Concrete Builder class
3.
What are the consequences of applying the Builder
design pattern?
a) it makes the designed
product hierarchies exchangeable
b) it's easier to introduce new
product implementation
c)
it separates the prodcut
construction from it's representation
d)
the director has fine
control over the product creation procedure
4.
When would you use the GOF builder design pattern?
a)
to build different
representations of complex objects based on the concrete implementations of
construction procedure
b) to establish an interface
for creating an object, but let the concrete implementations decide which
subclass to instantiate
c) to encapsulate a family of
individual factories that have a common theme
5.
Which design pattern you would you use to control the
creation of an object based on a established interface, while allowing the
concrete implementation to determine the subclass to construct.
a) Singleton design pattern
b) Builder Factory design
pattern
c) Prototype factory design
pattern
d)
Factory method design
pattern
Chapter 3 1) A remote object is not an instance of the RemoteObject class.a. True b. False 2) The RemoteObject class includes:a. toString()b. hashCode()c. clone()d. All of the mentioned 3) RMI is a pure
java solution to Remote Procedure Calls (RPC) and is used to create distributed
application in java.
a. True
b. False
4) Stub and
Skeleton objects are used for communication between client and client side.
a. True
b. False
4) The rebind
method of Naming class is used to bind the remote object to the new name.
a. True
b. False
FS17CO020
Chapter
1
1) Which of these is a standard for communicating multimedia content over email? a) http b) https c) Mime d) httpd
2) Which of these class is used for operating on request from the client to the server? a) http b) httpDecoder c) httpConnection d) httpd
3) Which of these method of MimeHeader is used to return the string equivalent of the values stores on MimeHeader? a) string() b) toString() c) convertString() d) getString()
4) What is the output of this program? 1. import java.net.*; 2. class networking { 3. public static void main(String[] args) throws MalformedURLException { 4. URL obj = new URL("http://www.sanfoundry.com/javamcq"); 5. System.out.print(obj.getProtocol()); 6. } 7. } a) http b) https c) www d) com 5) What is the output of this program? 1. import java.net.*; 2. class networking { 3. public static void main(String[] args) throws MalformedURLException { 4. URL obj = new URL("http://www.sanfoundry.com/javamcq"); 5. System.out.print(obj.getPort()); 6. } 7. } a) 1 b) 0 c) -1 d) garbage value Chapter
2
1. Which Design Pattern should you use when an
application uses a large number of objects and the storage costs are high
because of the sheer quantity of objects
a) Interpreter
b) Prototype
c) Decorator
d)
Flyweight
- Which Design Pattern should
you use when an object structure contains many classes of objects with
differing interfaces, and you want to perform operations on these objects
that depend on their concrete classes
a) Façade
b) Adapter
c) Decorator
d)
Visitor
- Which Design Pattern should
you use when you want to add responsibilities to individual objects
dynamically and transparently, that is, without affecting other objects.
a) Visitor
b) Memento
c)
Decorator
d) Proxy
- Which
Design Pattern should you use when there must be exactly one instance of a
class, and it must be accessible to clients from a wellknown access point.
a) Bridge
b)
Singleton
c) Prototype
d) Factory Method
- Which Design Pattern should
you use when there is a language to interpret, and you can represent
statements in the language as abstract syntax trees.
a)
Interpreter
b)
Singleton
c)
Façade
d)
Composite
Chapter
3
1) The stub
consists of
a. An identifier of the remote object to be used
b. Method name which is to be invoked
c. Parameters to the remote JVM
d. All of the Mentioned
2) What does this “import java.rmi.*;” imports?
a. All the classes present in java
b. All the classes present
in java.rmi
c. All the methods in java.rmi
d. None of the Mentioned
3) What does throws RemoteException mean?
a. Throwing a RemoteException
b. Catching a RemoteException
c. Explicitly telling the java compiler to handle RemoteException
4) A remote interface extends the
interface java.rmi.Remote and
declares a set of remote methods.
a. True
b. False
5) The call to LocateRegistry.getRegistry simply
returns an appropriate stub for a registry.
a. True
b. False
FS17C0021
Chapter
1
1.
Cookies were originally designed for __________
a) Client-side programming
b) Server-side programming
c) Both Client-side & Server-side
programming
d) Wweb programming
2. The
Cookie manipulation is done using which property?
a) cookie
b) cookies
c) manipulate
d) modify
3.
Which of the following explains Cookies nature?
a) Non Volatile
b) Volatile
c) Intransient
d) Transient
4.
Which attribute is used to extend the lifetime of a cookie?
a) higher-age
b) increase-age
c) max-age
d) lifetime
5.
Which of the following defines the Cookie visibility?
a) document Path
b) localStorage
c) sessionStorage
d) all of the mentioned
Chapter
2
1.
Which
Design Pattern should you use when you want to avoid
a permanent binding between an abstraction and its implementation. This might
be the case, for example, when the implementation must be selected or switched
at run-time.
a)
Abstract Factory
b)
Strategy
c)
Template Method
d) Bridge
2.
Which
Design Pattern should you use when the construction
process must allow different representations for the object that's constructed.
a) Singleton
b) Composite
c) Decorator
d) Builder
a) State
b)
Memento
c) Command
d) Observer
4. Which Design Pattern should you use when you
want to parameterize objects by an action to perform.
a)
Command
b) Prototype
c) Strategy
d) Builder
5. Which Design Pattern should you use when many
related classes differ only in their behavior or you need different variants of
an algorithm. For example, you might define algorithms reflecting different
space/time trade-offs.
a) Composite
b) Factory Method
c) Proxy
d) Strategy
Chapter
3
1) If no registry is running on TCP port 1099 of
the local host when the bind method
is invoked, the server will fail with a RemoteException.
a. True
b. False
2) What is the command to
start the rmiregistry on windows?
a. rmiregistry
b. start rmiregistry
c.
start rmi registry
d. None
of the mentioned
3) We make a stub file from the '*.class' file
with the implementation of the remote interface, not from the '*.java' file.
a. True
b. False
4) The correct order to make
a simple RMI “Hello World” program:
1.
Write the Java sources
2.
Compile and deploy class files
3.
Start the RMI registry, server, and client
a. 1,2,3
b.
2,1,3
c.
3,2,1
d.
3,1,2
5) A "server" class in this context, is the class
which has a main method that:
a. creates
an instance of the remote object implementation, and
b.
binds that instance to a name in the rmiregistry.
c. both a and b
d. none
of the mentioned
FS17CO022
Chapter
1
1.
Which of the following can be used to configure the scope of the Cookie
visibility?
a) path
b) domain
c) both path and domain
d) server
2. How
can you set a Cookie visibility scope to localStorage?
a) /
b) %
c) *
d) //
3.
Which of the following is a boolean cookie attribute?
a) bool
b) secure
c) lookup
d) domain
4.
Which of the following function is used as a consequence of not including
semicolons, commas or whitespace in the Cookie value?
a) encodeURIComponent()
b) encodeURI()
c) encodeComponent()
d) encode()
5. What
is the constraint on the data per cookie?
a) 2 KB
b) 1 KB
c) 4 KB
d) 3 KB
Chapter
2
1.
Which
Design Pattern should you use when you want to
represent part-whole hierarchies of objects.
a) Composite
b) Iterator
c) Abstract Factory
d) Flyweight
2.
Which
Design Pattern should you use when you want to access
an aggregate object's contents without exposing its internal representation.
a) Iterator
b) Composite
c) Proxy
d) Bridge
3.
Which
Design Pattern should you use when a class wants its
subclasses to specify the objects it creates.
a)
Bridge
b)
Strategy
c)
Factory Method
d)
Builder
4.
Which
Design Pattern should you use when to control
subclasses extensions. You can define a template method that calls
"hook" operations at specific points, thereby permitting extensions
only at those points.
a)
State
b)
Strategy
c) Template Method
d)
Factory Method
5. Which
Design Pattern should you use when you want to provide a simple interface to a
complex subsystem.
a)
Adapter
b) Façade
c) Composite
d)
Abstract Factory
Chapter
3
1) java.rmi.Server and
java.rmi.Registry are class files.
a. True
b. False
2) When the skeleton receives
the incoming request, it does the following tasks?
a. It reads the parameter
for the remote method
b. It waits for the result
c. It writes and transmits
(marshals) the result to the called.
d. It reads (unmarshals) the
return value or exception
e. Both A & C
3) RMI
has which of these protocols implementations?
a. Java Remote Method Protocol (JRMP)
b. Internet Inter-ORB Protocol (IIOP)
c. Jinni Extensible Remote Invocation (JERI)
d. All mentioned above
4) Which of the following is
not the Exception from java,rmi package:
a. AccessException
b. ArrayIndexOutOfBoundException
c. RemoteException
d. ConnectException
5)
MarshalledObject in java.rmi is an interface.
a. True
b. False
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