Wednesday, August 21, 2013

Java Programming - 8

LIST OF ATTEMPTED QUESTIONS AND ANSWERS

True/False
Question
Nested if is less efficient then switch statement.
Correct Answer
True
Your Answer
True

Select The Blank
Question
________ are stored in hierarchical manner.
Correct Answer
Packages
Your Answer
Packages

Select The Blank
Question
The mechanism by which java frees the memory occupied by unused objects is ________.
Correct Answer
Garbage Collection
Your Answer
Garbage Collection

Multiple Choice Single Answer
Question
When you implement an interface method, it must be declared as :-
Correct Answer
Public
Your Answer
Public

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

True/False
Question
In While loop condition can be any Boolean expression
Correct Answer
True
Your Answer
True

Select The Blank
Question
Long makes it useful when big ________ numbers are needed.
Correct Answer
Whole
Your Answer
Real

Multiple Choice Single Answer
Question
Which Control Statement allow the program to execute in a non-linear fashion?
Correct Answer
Jump
Your Answer
Break

True/False
Question
With java Type Casts are checked at both compile-time and runtime.
Correct Answer
True
Your Answer
False

Multiple Choice Multiple Answer
Question
Which of the following assignments are valid?
Correct Answer
short s = 28; , double d = 2.3; , int I = '1';
Your Answer
short s = 28; , float f = 2.3;

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

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

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

Multiple Choice Multiple Answer
Question
What are the programming constructs?
Correct Answer
Sequential , Selection -- if and switch statements , Iteration -- for loop, while loop and do-while loop
Your Answer
Sequential , Selection -- if and switch statements , Iteration -- for loop, while loop and do-while loop

Multiple Choice Single Answer
Question
What can be created by instantiating an object type thread?
Correct Answer
Thread
Your Answer
Thread

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
How to declare an interface example?
Correct Answer
access class classname implements interface.
Your Answer
access interface name

True/False
Question
Integer can Cast to byte value.
Correct Answer
False
Your Answer
False

True/False
Question
Transient variable is variable that may not be serialized.
Correct Answer
True
Your Answer
True

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 ________ loop repeats a set of statements a certain number of times until a condition is matched.
Correct Answer
For
Your Answer
For

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

True/False
Question
By default, all program import the java.lang package.
Correct Answer
True
Your Answer
True

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

True/False
Question
Do while loop always executes its body at least once, because its conditional expression is at the bottom of the loop.
Correct Answer
True
Your Answer
True

Multiple Choice Multiple Answer
Question
Which statements can be used with the java's loop?
Correct Answer
Jump , Continue , Break
Your Answer
Continue , Break

Match The Following
Question
Correct Answer
Your Answer
start( )
thread
child thread
main thread
child thread
main
NewThread
this
new
sleep( )
milliseconds
milliseconds

Select The Blank
Question
________ are containers for classes.
Correct Answer
Packages
Your Answer
Packages

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

Select The Blank
Question
The default encoding of objects supports the ________ of the classes.
Correct Answer
Evolution
Your Answer
Encoding

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

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
Distributed

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

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

Multiple Choice Multiple Answer
Question
Which one does not extend java.lang.Number?
Correct Answer
Boolean , Character
Your Answer
Character

Select The Blank
Question
The smallest integer type is ________.
Correct Answer
Byte
Your Answer
Byte

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

True/False
Question
Casting does not affect the original object or value.
Correct Answer
True
Your Answer
True

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

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

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 , List of parameters

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

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

Multiple Choice Single Answer
Question
Which statement defines a name space in which classes are stored?
Correct Answer
package
Your Answer
package

Multiple Choice Single Answer
Question
Which statement is used to explicitly return from a method?
Correct Answer
Return
Your Answer
Return

Multiple Choice Multiple Answer
Question
There are two distinct types of multitasking. Which are those?
Correct Answer
Process based , Thread-base
Your Answer
Process based , Thread-base

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

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