Java Programming - 7

LIST OF ATTEMPTED QUESTIONS AND ANSWERS

Multiple Choice Single Answer
Question
Java's which system allows a thread to enter a synhcronized method on an object, and then wait there until some other thread explicitly notifies it to come out :-
Correct Answer
Messaging
Your Answer
Run time

Multiple Choice Multiple Answer
Question
Packages act as containers for :-
Correct Answer
Classes , Subordinate packages
Your Answer
Subordinate packages , Classes

True/False
Question
Threads priorities are not integers that specify the relative priority of one thread to another.
Correct Answer
False
Your Answer
False

Multiple Choice Single Answer
Question
When java program starts up, which thread begins running immediately?
Correct Answer
Main thread
Your Answer
Main thread

Multiple Choice Single Answer
Question
Java provides built-in support for which programming?
Correct Answer
Multithreaded
Your Answer
Multithreaded

Select The Blank
Question
The ________ is similar to break, except that instead of halting the execution of the loop, it starts the next iteration.
Correct Answer
Continue
Your Answer
Continue

Multiple Choice Single Answer
Question
When can a constructor be called without specifying arguments?
Correct Answer
When there are no constructors for the class
Your Answer
When the default constructor is not called

Match The Following
Question
Correct Answer
Your Answer
Memory deallocation
Garbage Collection
Garbage Collection
This
Current Object
Current Object
Constructor
Initialization object
Initialization object
Parameters
Method Generalized
Method Generalized

Select The Blank
Question
The mechanism which binds together the code and data and keeps both safe is ________.
Correct Answer
Encapsulation
Your Answer
Encapsulation

Select The Blank
Question
________ is an instance of a class that implements the runnable interface.
Correct Answer
threadOb
Your Answer
threadO

Multiple Choice Multiple Answer
Question
Expression must be of the data types :-
Correct Answer
Byte , Short , Int
Your Answer
Byte , Short , Int , Boolean

True/False
Question
Java define eight simple types of data byte, short, int, long, char, float, double, boolean.
Correct Answer
True
Your Answer
True

Multiple Choice Multiple Answer
Question
What modifiers may be used with top-level class?
Correct Answer
Public , Abstract , Final
Your Answer
Public , Abstract , Final

Multiple Choice Single Answer
Question
Syntax to declare a variable in java is :-
Correct Answer
type identifier [=value][,identifier[=value]…]
Your Answer
type identifier [=value][,identifier[=value]…]

Select The Blank
Question
________ statement in java is conditional branch statement.
Correct Answer
If
Your Answer
If

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
Break

Select The Blank
Question
In ________ statement condition is true, then statement 1 is executed.
Correct Answer
If
Your Answer
If

Multiple Choice Multiple Answer
Question
The source for the frist package defines three classes
Correct Answer
Protection , Derived , SamePackage
Your Answer
Protection , Derived , SamePackage

True/False
Question
Java compiler stores the .class files in the path specified in CLASSPATH environmental variable.
Correct Answer
False
Your Answer
True

True/False
Question
Interface can be extended.
Correct Answer
True
Your Answer
True

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

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

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

True/False
Question
Float data type is useful when we need fractional values.
Correct Answer
True
Your Answer
True

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 , Create object

True/False
Question
Variable in an interface are implicitly final and static.
Correct Answer
True
Your Answer
True

Multiple Choice Single Answer
Question
Which of the following operators are used in conjunction with the this and super references?
Correct Answer
The dot operator
Your Answer
The dot operator

Select The Blank
Question
The ________ keyword halts the execution of the current loop and forces control out of the loop.
Correct Answer
Break
Your Answer
Break

Multiple Choice Single Answer
Question
What is a data structure that controls the state of a collection of threads as a whole?
Correct Answer
Thread group
Your Answer
Thread group

Multiple Choice Multiple Answer
Question
By Providing the interface keyword, Java allows you to fully utilize the which aspect of polymorphism?
Correct Answer
One interface , Multiple methods
Your Answer
One interface , Multiple methods , Derived

Select The Blank
Question
For externalizable objects the ________ is solely responsible for the external format of its contents.
Correct Answer
Class
Your Answer
Objects

Multiple Choice Multiple Answer
Question
Which are the java's control statements?
Correct Answer
For , If , Switch
Your Answer
For , Switch , Continue

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

Multiple Choice Multiple Answer
Question
Java Operators can be divided into these groups :-
Correct Answer
Arithmetic , Bitwise , Relational
Your Answer
Arithmetic , Bitwise , Relational

Match The Following
Question
Correct Answer
Your Answer
Interface
Abtract method
Abtract method
Pacakge declaration
Package pkg
Package pkg
Java.applet.Applet
Class Applet
Class Applet
Java.applet
Java.applet package
Java.applet package

Multiple Choice Single Answer
Question
What is an array?
Correct Answer
It is value collection of same type of data type
Your Answer
It is value collection of same type of data type

Multiple Choice Multiple Answer
Question
Modulus operator % can be applied to these data types :-
Correct Answer
floating Point , Integer , Character
Your Answer
floating Point , Integer

Select The Blank
Question
Start( )executes a call to ________.
Correct Answer
run( )
Your Answer
run( )

Select The Blank
Question
________ is an instance of the class.
Correct Answer
Object
Your Answer
Object

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

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

Multiple Choice Single Answer
Question
Which Control Statements enable program execution to repeat one or more statements?
Correct Answer
Iteration
Your Answer
Iteration

True/False
Question
The switch statement does not require a break.
Correct Answer
False
Your Answer
True

True/False
Question
In Interface we need not use the keyword abstract for the methods.
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(^)

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

Multiple Choice Multiple Answer
Question
Which thread is created automatically when the program is started?
Correct Answer
Main thread
Your Answer
Main thread , Current thread