Java Quiz

JAVA Quiz

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Question 1

Which class can access all public and protected methods and fields of its super class?

A	Inner class
B	outer class
C	sub-class
D	Super class

Question 2

Method,Field can be accessed from the same class to which they belong.

A	Public
B	Protected
C	Default
D	Private

Question 3

In java, float takes _________ bytes in memory.

A	8
B	4
C	2
D	16

Question 4

What will be the output of following piece of code? ? public class operatorExample { public static void main(String args[]) { int x=4; System.out.println(x++); } }

A	output=0
B	output=6
C	output=5
D	output=4

Question 5

Can variables be used in Java without initialization?

A	NO
B	YES

Question 6

Can a class in java be inherited from more than one class?

A	YES
B	NO

Question 7

What will be the output of Round(3.7).

A	4
B	3.7
C	3
D	0

Question 8

Does Java supports goto?

A	NO
B	YES

Question 9

In JAVA can a dead thread be started again?

A	YES
B	NO

Question 10

Is JDK required on each machine to run a Java program?

A	YES
B	NO

Question 11

Which tool is required on each machine to run a Java program?

A	JDK
B	SDK
C	JRE
D	CVS

Question 12

Is it possible to define a method in Java class but provide it’s implementation in the code of another language like C?

A	NO
B	YES

Question 13

Can a variable be local and static at the same time?

A	NO
B	YES

Question 14

Can we have any other return type than void for main method in java class?

A	YES
B	NO

Question 15

Which method of the Runnable interface that must be implemented by all threads?

A	Run()
B	Start()
C	Sleep()
D	Wait()

Question 16

Which Keyword is used If a class has multiple constructors defined,it's possible to call a constructor from another constructor’s body?

A	super()
B	constant()
C	this()

Question 17

Can we compare string and stringBuffer in Java?

A	YES
B	NO

Question 18

Can we cast any other type to boolean type with type casting?

A	YES
B	NO

Question 19

Base class for all exceptions

A	Java.throwable
B	Java.Lang.throwable
C	Java.Lang.Exception
D	Java.Lang.throwables

Question 20

Environment variable that stores the location of bin folder

A	PATH
B	CLASSPATH
C	PATHS
D	BIN

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