Deck 13: Java Programming: GUI, RMI, Polymorphism, and String Handling

Question 1

The following specifies the advantages of It is lightweight. It supports pluggable look and feel. It follows MVC (Model View Controller) architecture.

A)Swing
B)AWT
C)Both A & B
D)None of the above

Answer 1

Swing

Question 2

Swing is not a part of JFC (Java Foundation Classes) that is used to create GUI application?

A)True
B)False
C)none
D)all

Answer 2

False

Question 3

These two ways are used to create a Frame By creating the object of Frame class (association) By extending Frame class (inheritance)

A)True
B)False
C)none
D)all

Answer 3

False

Question 4

Which package provides many event classes and Listener interfaces for event handling?

A)java.awt
B)java.awt.Graphics
C)java.awt.event
D)None of the above

Question 5

The ActionListener interface is used for handling action events,For example,it's used by a

A)JButton
B)JCheckbox
C)JMenuItem
D)All of these

Question 6

Which is the container that doesn't contain title bar and MenuBars. It can have other components like button, textfield etc?

A)Window
B)Frame
C)Panel
D)Container

Question 7

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

Question 8

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

Question 9

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

Question 10

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

Question 11

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

Question 12

Which is built on the top of socket programming?

A)EJB
B)RMI
C)Both A & B
D)None of the above

Question 13

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

Question 14

In RMI applications which program obtains a remote reference to one or more remote objects on a server and then invokes methods on them?

A)Server
B)Client
C)Both A & B
D)None of the above

Question 15

Which is a one-way communication only between the client and the server and it is not a reliable and 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

Question 16

In a RMI Client Program, what are the exceptions which might have to handled?

A)RemoteException
B)NotBoundException
C)MalFormedURLException
D)All mentioned above

Question 17

Abbreviate the term DGC?

A)Digital Garbage Collection
B)Distributed Garbage Collection
C)Distributed Garbage Connection
D)None of the above

Question 18

Which of the following is a type of polymorphism in Java?

A)Compile time polymorphism
B)Execution time polymorphism
C)Multiple polymorphism
D)Multilevel polymorphism

Question 19

When does method overloading is determined?

A)At run time
B)At compile time
C)At coding time
D)At execution time

Question 20

Which concept of Java is a way of converting real world objects in terms of class?

A)Polymorphism
B)Encapsulation
C)Abstraction
D)Inheritance

Question 21

Which component is responsible to optimize bytecode to machine code?

A)JVM
B)JDK
C)JIT
D)JRE

Question 22

How can we identify whether a compilation unit is class or interface from a .class file?

A)Java source file header
B)Extension of compilation unit
C)We cannot differentiate between class and interface
D)The class or interface name should be postfixed with unit type

Question 23

Which of these packages contains abstract keyword?

A)java.lang
B)java.util
C)java.io
D)java.system

Question 24

Which of these class is used to create an object whose character sequence is mutable?

A)String()
B)StringBuffer()
C)String() & StringBuffer()
D)None of the mentioned

Question 25

Which of these method of class StringBuffer is used to find the length of current character sequence?

A)length()
B)Length()
C)capacity()
D)Capacity()