Java 60 MCQS Question paper Online Test Series 5251

Java MCQ question Paper Basic To Advanced

1 / 60

Increment operator is:

inc

2 / 60

Which method prints a line and moves to the next line?

println()

print()

output()

write()

3 / 60

Strings are ______ in Java.

Mutable

Immutable

4 / 60

Comments are used for:

Errors

Debugging only

Documentation

Execution

5 / 60

Which of these is correct syntax?

System.out.println("Hi");

system.out.println("Hi");

echo("Hi");

println("Hi");

6 / 60

switch works with:

int, char, String

double

boolean only

float

7 / 60

Java is ______ typed.

Statically

Loosely

Dynamically

Weakly

8 / 60

Java is a ______ language.

Both

None

Interpreted

Compiled

9 / 60

Type of Margin in notepad ?

10 / 60

Math.pow(2,4) equals:

11 / 60

Array index starts from:

12 / 60

Which declares an integer variable correctly?

num int;

int num;

integer num;

var int;

13 / 60

Static variables are shared by ______.

One object only

None

All objects

One method

14 / 60

Every case label must end with:

;

break;

exit;

stop;

15 / 60

Which is the assignment operator?

16 / 60

default case in switch is:

Optional

Mandatory

17 / 60

Nested if means:

Multiple ifs inside another if

Only one if

18 / 60

Math.abs(-8) returns:

-8

Error

19 / 60

Which is widening conversion?

float → byte

double → int

int → double

long → short

20 / 60

Which requires explicit cast?

Widening

Narrowing

21 / 60

Boolean can store:

Yes/No

T/F

1/0

true/false

22 / 60

To get array length:

arr.size()

arr.length

Alm(544)

length(arr)

23 / 60

Infinite loop example:

while(true)

for(;;)

24 / 60

Default value of an int variable is:

undefined

null

25 / 60

Converting one data type into another is called:

Conversion

Evaluation

Promotion

Typecasting

26 / 60

Correct declaration:

new array[3];

arr int[] = {1,2,3};

array arr[] = new int;

int arr[] = {1,2,3};

27 / 60

String class belongs to package:

java.string

java.util

java.lang

java.io

28 / 60

Which loop executes fixed number of times?

while

for

All of the above

do-while

29 / 60

To compare two strings:

equals()

match()

compare()

30 / 60

The entry point of any Java program is the ______ method.

start()

main()

run()

init()

31 / 60

Who is known as the father of Java?

Guido van Rossum

Dennis Ritchie

James Gosling

Bjarne Stroustrup

32 / 60

double x = 9.8; int y = (int)x;

Valid

Invalid

33 / 60

Java was developed by ______.

Microsoft

Sun Microsystems

Oracle

Apple

34 / 60

Syntax of for loop:

All Of the above

for(init; update; condition)

for(init; condition; update)

for(condition; init; update)

35 / 60

Variables store ______.

Operators

Keywords

Classes

Data values

36 / 60

What does System.out.print() do?

Reads input

Prints with newline

Stops program

Prints without newline

37 / 60

!(5 == 5) results in:

false

true

38 / 60

(10 > 5) && (2 < 4) returns:

true/false

false/true

false

true

39 / 60

Single-line comments use:

/* */

<!– –>

40 / 60

Which keyword defines a class?

Class

define

object

class

41 / 60

To find length of a String:

str.length()

str.count()

size(str)

str.size()

42 / 60

Which performs multiplication?

mul

43 / 60

Identifiers in Java are ______.

Case-sensitive

Numeric

Non-sensitive

Case-insensitive

44 / 60

Syntax of if statement:

if:condition

if{condition}( )

if(condition){ }

None

45 / 60

Logical AND is:

46 / 60

for loop repeats until:

Condition is true

Condition is false

47 / 60

Which package is required for Scanner?

java.util.*

java.io.*

java.lang.*

java.scanner.*

48 / 60

Random number function:

Math.random()

random.Math()

rand()

Math.rand()

49 / 60

The extension of Java source files is ______.

.class

.java

.jav

.jar

50 / 60

System.out.println(“A”+”B”); prints:

Error

A B

A+B

51 / 60

What executes when if condition is false?

if block

else block

52 / 60

The modulus operator is:

53 / 60

Size of double type is:

16 bytes

2 bytes

4 bytes

8 bytes

54 / 60

Which is not a primitive type?

float

int

char

String

55 / 60

Boolean type holds:

Yes or No

1 or 0

‘T’ or ‘F’

true or false

56 / 60

Output of System.out.println(5+5+”Java”);

Java10

Error

10Java

55Java

57 / 60

Math.sqrt(25) returns:

Error

58 / 60

Default value of boolean is:

false

true

null

59 / 60

Java statements end with a ______.

Period

Semicolon

Colon

Comma

60 / 60

Multi-line comments start with:

/**

Your score is

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