Java Programming - 2

LIST OF ATTEMPTED QUESTIONS AND ANSWERS

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
How can class be imported from a package to a program?
Correct Answer
import java.packagename.classname
Your Answer
import java.package.class

Multiple Choice Single Answer
Question
Which keyword is used to create an instance of a class?
Correct Answer
new
Your Answer
new

Multiple Choice Single Answer
Question
Multiple Choice Single Response
Correct Answer
Object oriented programming.
Your Answer
Object oriented programming.

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

Multiple Choice Single Answer
Question
How multidimensional array is declared?
Correct Answer
int[4] [5];
Your Answer
int[4] [5];

Multiple Choice Multiple Answer
Question
What returns a reference to the thread in which it is called?
Correct Answer
Method , Class , Object
Your Answer
Method , Class , Object

True/False
Question
Casting occurs commonly between numeric types
Correct Answer
True
Your Answer
True

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

True/False
Question
Running threads can be suspended, which temporarily suspends its activity.
Correct Answer
True
Your Answer
True

Select The Blank
Question
A ________ is a subclass of itself.
Correct Answer
Class
Your Answer
Class

Multiple Choice Single Answer
Question
How many concrete classes can you have inside an interface?
Correct Answer
none
Your Answer
none

Multiple Choice Single Answer
Question
Java Applets are intelligent programs means :-
Correct Answer
They can react to user input and dynamically change.
Your Answer
They can react to user input and dynamically change.

Multiple Choice Single Answer
Question
Which of the following can be referenced by 'this' variable?
Correct Answer
The instance variables and methods of a class
Your Answer
The instance variables of a class only

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

True/False
Question
Object oriented programming organizes a program around processes acting on data.
Correct Answer
False
Your Answer
False

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
________ are stored in hierarchical manner.
Correct Answer
Packages
Your Answer
Packages

Multiple Choice Multiple Answer
Question
What are different data types in java?
Correct Answer
char , double , byte
Your Answer
char , double , byte

Multiple Choice Single Answer
Question
Select the facility provided along with JVM which enhances speed of execution :-
Correct Answer
Just-In-Time (JIT) compiler.
Your Answer
Just-In-Time (JIT) compiler.

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
Short-Circuit Logical Operators

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 , Character

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

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

Multiple Choice Single Answer
Question
Using which keyword we can fully abstract a class?
Correct Answer
interface
Your Answer
interface

Select The Blank
Question
The ________ repeat a set of code while the condition is false.
Correct Answer
While loop
Your Answer
While loop

Multiple Choice Multiple Answer
Question
Which of the following are mathematical Expressions?
Correct Answer
(+ +) , (+ =) , (- =)
Your Answer
(+ +) , (+ =) , (- =)

Multiple Choice Single Answer
Question
Which method is used to determine the class of an object?
Correct Answer
getClass( ) method
Your Answer
getClass( ) method

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

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

Multiple Choice Single Answer
Question
Java was developed at :-
Correct Answer
Sun Microsystems
Your Answer
Sun Microsystems

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

True/False
Question
If the break statement is omited in switch statement, then execution will continue on into the next case.
Correct Answer
True
Your Answer
True

Multiple Choice Multiple Answer
Question
Java defines two ways when instantiating an object, such as :-
Correct Answer
Can implement the runnable interface , Can extend the thread class
Your Answer
Can implement the runnable interface , Can extend the thread class

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

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

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

Multiple Choice Single Answer
Question
What are the possible access modifiers while implementing interface methods?
Correct Answer
public
Your Answer
public

Multiple Choice Multiple Answer
Question
Which is a public static member of thread?
Correct Answer
currenthread( ) , mainthread( )
Your Answer
currenthread( ) , mainthread( )

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

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

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

True/False
Question
Boolean values can be cast into any other primitive type.
Correct Answer
False
Your Answer
False

True/False
Question
Constructors can be overloaded like regular methods.
Correct Answer
True
Your Answer
True

Select The Blank
Question
The name of the new thread is specified by ________.
Correct Answer
threadName
Your Answer
threadName

Multiple Choice Single Answer
Question
A Java application can execute anywhere on the network, this implements that Java is :-
Correct Answer
Architecture neutral
Your Answer
Architecture neutral

Match The Following
Question
Correct Answer
Your Answer
It can have only one of two possible values
Boolean type
Boolean type
Float hightemp, lowtemp
Float variable declarations
Float variable declarations
Smallest int type
Byte
Byte
Floating point numbers are also known as
Real Numbers
Real Numbers