Java Programming - 3

LIST OF ATTEMPTED QUESTIONS AND ANSWERS

Multiple Choice Multiple Answer
Question
What all the run( ) method can do?
Correct Answer
Can call other method , Declare variable
Your Answer
Can call other method , Declare variable

True/False
Question
Each class in java can have a finalizer method.
Correct Answer
True
Your Answer
True

Multiple Choice Multiple Answer
Question
Method definition has four parts, they are :-
Correct Answer
Name of the method , Type of object , List of parameters
Your Answer
Name of the method , Type of object , List of parameters , Class

Multiple Choice Single Answer
Question
Which is the default access modifier for an interface method?
Correct Answer
public
Your Answer
main

Multiple Choice Multiple Answer
Question
Which are the two threads of java?
Correct Answer
mainthread( ) , childthread( )
Your Answer
mainthread( ) , childthread( )

Multiple Choice Single Answer
Question
Which operator is used to create and concatenate string?
Correct Answer
Addition operator(+).
Your Answer
Addition operator(+).

Select The Blank
Question
The ________ repeats a set of code at least once before the condition is tested.
Correct Answer
Do-while loop
Your Answer
Do-while loop

Multiple Choice Single Answer
Question
Which statement will always execute the body of a loop at least once?
Correct Answer
Do
Your Answer
Do

Select The Blank
Question
Double data type uses ________ to store a value
Correct Answer
64 bits
Your Answer
64 bits

True/False
Question
A thread's priority is used to decide when to switch from one running thread to the next, this is called as the context switch.
Correct Answer
True
Your Answer
True

Multiple Choice Multiple Answer
Question
What are the Logical operators?
Correct Answer
OR() , AND(&) , XOR(^)
Your Answer
OR() , AND(&) , XOR(^)

Match The Following
Question
Correct Answer
Your Answer
The data, or variable, defined within a class
Instance variable.
Instance variable.
General form of Cast
(target--type)value
(target--type)value
Determine the relationship that one operand has to the other
Relational Operator
Relational Operator
The secondary versions of the Boolean AND and OR operators
Short-Circuit Logical Operators
Comparison operator

Multiple Choice Multiple Answer
Question
Which of these lines of code will compile?
Correct Answer
short s = 20; , char c = 32; , double d = 1.4;
Your Answer
short s = 20; , char c = 32; , double d = 1.4;

Select The Blank
Question
Threads define several ________.
Correct Answer
constructors
Your Answer
constructors

True/False
Question
A thread can be blocked when waiting for a resource.
Correct Answer
True
Your Answer
True

Multiple Choice Single Answer
Question
Which cast must be used to convert a larger value into a smaller one?
Correct Answer
Explicit cast.
Your Answer
Explicit cast.

Select The Blank
Question
________ is the logical construct upon which the entire java language is built.
Correct Answer
Class
Your Answer
Method

Multiple Choice Single Answer
Question
What is meant by garbage collection?
Correct Answer
Object is no longer referred to by any variable
Your Answer
Object is no longer referred to by any variable

True/False
Question
Short data type range is -30,376 to 32768.
Correct Answer
False
Your Answer
False

Select The Blank
Question
________method starts a threrad by calling its run method.
Correct Answer
start( )
Your Answer
start( )

Multiple Choice Multiple Answer
Question
Exit statement is optional in which loops in java?
Correct Answer
For , While , Do-while
Your Answer
While , For , Continue

Match The Following
Question
Correct Answer
Your Answer
Exit any loop
Break
Break, continue, return
If
Else
Else
Loop
While
While
Jump
Break, continue, return
Goto

Select The Blank
Question
A ________can implement more than one interface.
Correct Answer
Class
Your Answer
Method

Select The Blank
Question
The most commonly used ________eger type is int.
Correct Answer
int
Your Answer
int

Select The Blank
Question
In ________ statement the value of the expression is compared with each of the literal values in case statements.
Correct Answer
Switch
Your Answer
Switch

Multiple Choice Single Answer
Question
Which statement used inside a set of nested loops, will only break out of the innermost loop?
Correct Answer
Break
Your Answer
Jump

Multiple Choice Multiple Answer
Question
Main thread is important for which two reasons?
Correct Answer
It is thread from which other "child" thread will be swapped , Often it must be the last thread to finish execution because It performs various shutdown actions
Your Answer
It is thread from which other "child" thread will be swapped , Often it must be the last thread to finish execution because It performs various shutdown actions

True/False
Question
There is no Global Variable in Java.
Correct Answer
True
Your Answer
False

Multiple Choice Multiple Answer
Question
Which are keywords in Java?
Correct Answer
Extends , Synchronized , Sizeof
Your Answer
Synchronized , Sizeof

Select The Blank
Question
There are ________ kinds of Floating point type
Correct Answer
Two
Your Answer
One

Multiple Choice Single Answer
Question
How to change the values of the elements of the array?
Correct Answer
By using array subscript expression
Your Answer
By specifying index number

Multiple Choice Multiple Answer
Question
Which loops can be nested in java?
Correct Answer
While , Do-while , For
Your Answer
While , Do-while , For , Jump

Multiple Choice Multiple Answer
Question
Which are the keywords use in switch statement?
Correct Answer
Case , Default
Your Answer
Case , Default , Exit

Multiple Choice Single Answer
Question
What is a string?
Correct Answer
A combination of characters called as string
Your Answer
A combination of characters called as string

True/False
Question
All the methods declared inside an Interface are abstract.
Correct Answer
True
Your Answer
True

Multiple Choice Single Answer
Question
Which Control Statements allow the program to choose different paths of execution?
Correct Answer
Selection
Your Answer
Jump

Multiple Choice Single Answer
Question
What are primitive data types?
Correct Answer
byte, short, int, long
Your Answer
byte, short, int, long

Select The Blank
Question
The explicit drop of an object reference by setting the value of a variable, whose data type is a reference type of ________.
Correct Answer
Null
Your Answer
Instance

True/False
Question
A suspended thread can then be resumed allowing it to pick up where it left off.
Correct Answer
True
Your Answer
True

Multiple Choice Multiple Answer
Question
Java's multithreading system is built upon :-
Correct Answer
Thread class , Its methods , Companion interface
Your Answer
Thread class , Its methods , Method

Multiple Choice Single Answer
Question
How array is defined?
Correct Answer
int arr[];
Your Answer
arr[10];

Multiple Choice Single Answer
Question
How do you assign values to variables?
Correct Answer
By using the assignment operator =.
Your Answer
By using the assignment operator =.

True/False
Question
Byte can be Cast to Double Value.
Correct Answer
True
Your Answer
False

Select The Blank
Question
Anything declared ________ can be accessed from anywhere within program.
Correct Answer
Public
Your Answer
Public

Multiple Choice Single Answer
Question
What are the kinds of variables in Java?
Correct Answer
Instance, local, class variables
Your Answer
Varchar, rawtype

True/False
Question
Is it necessary to implement all the methods of an interface while implementing the interface
Correct Answer
False
Your Answer
False