Java Quiz

1

Instructions For Quiz

This Mock Test has 20 Questions
Each Question is of 1 marks so total 20 marks
Multiple Choice Questions(MCQ) with only ONE valid answer

2

1) Which class can access all public and protected methods and fields of its super class?* This field is required.

Inner class

outer class

sub-class

Super class

3

2) Method,Field can be accessed from the same class to which they belong.* This field is required.

Public

Protected

Default

Private

4

3) In java, float takes _________ bytes in memory.* This field is required.

8

4

2

16

5

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

output=0

output=6

output=5

output=4

6

5) Can variables be used in Java without initialization?* This field is required.

No

Yes

7

6) Can a class in java be inherited from more than one class?* This field is required.

Yes

No

8

7) What will be the output of Round(3.7).* This field is required.

4

3.7

3

0

9

8) Does Java supports goto?* This field is required.

No

Yes

10

9) In JAVA can a dead thread be started again?* This field is required.

Yes

No

11

10) Is JDK required on each machine to run a Java program?* This field is required.

Yes

No

12

11) Which tool is required on each machine to run a Java program?* This field is required.

JDK

SDK

JRE

CVS

13

12) Is it possible to define a method in Java class but provide it’s implementation in the code of another language like C?* This field is required.

No

Yes

14

13) Can a variable be local and static at the same time?* This field is required.

No

Yes

15

14) Can we have any other return type than void for main method in java class?* This field is required.

Yes

No

16

15) Which method of the Runnable interface that must be implemented by all threads?* This field is required.

Run()

Start()

Sleep()

Wait()

17

16) Which Keyword is used If a class has multiple constructors defined,it's possible to call a constructor from another constructor’s body?* This field is required.

super()

constant()

this()

18

17) Can we compare string and stringBuffer in Java?* This field is required.

Yes

No

19

18) Can we cast any other type to boolean type with type casting?* This field is required.

Yes

No

20

19) Base class for all exceptions* This field is required.

Java.throwable

Java.Lang.throwable

Java.Lang.Exception

Java.Lang.throwables

21

20) Environment variable that stores the location of bin folder* This field is required.

PATH

CLASSPATH

PATHS

BIN