Java 60 MCQS Question paper Online Test Series 5251

Java MCQ question Paper Basic To Advanced

1 / 60

The extension of Java source files is ______.

.jar

.class

.java

.jav

2 / 60

Which requires explicit cast?

Narrowing

Widening

3 / 60

default case in switch is:

Optional

Mandatory

4 / 60

Which package is required for Scanner?

java.lang.*

java.scanner.*

java.io.*

java.util.*

5 / 60

Java is ______ typed.

Statically

Weakly

Loosely

Dynamically

6 / 60

To get array length:

length(arr)

arr.size()

arr.length

Alm(544)

7 / 60

Which performs multiplication?

mul

8 / 60

Java is a ______ language.

Compiled

Both

Interpreted

None

9 / 60

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

true/false

true

false

false/true

10 / 60

Who is known as the father of Java?

James Gosling

Dennis Ritchie

Guido van Rossum

Bjarne Stroustrup

11 / 60

String class belongs to package:

java.string

java.io

java.util

java.lang

12 / 60

switch works with:

int, char, String

float

boolean only

double

13 / 60

The modulus operator is:

14 / 60

Static variables are shared by ______.

None

One method

One object only

All objects

15 / 60

Array index starts from:

16 / 60

Logical AND is:

17 / 60

Boolean can store:

1/0

T/F

Yes/No

true/false

18 / 60

What executes when if condition is false?

if block

else block

19 / 60

Identifiers in Java are ______.

Case-sensitive

Case-insensitive

Numeric

Non-sensitive

20 / 60

Every case label must end with:

exit;

break;

stop;

;

21 / 60

Syntax of for loop:

All Of the above

for(init; update; condition)

for(condition; init; update)

for(init; condition; update)

22 / 60

What does System.out.print() do?

Reads input

Prints without newline

Stops program

Prints with newline

23 / 60

Which keyword defines a class?

object

define

class

Class

24 / 60

Java statements end with a ______.

Period

Comma

Colon

Semicolon

25 / 60

Infinite loop example:

while(true)

for(;;)

26 / 60

Default value of boolean is:

true

false

null

27 / 60

Strings are ______ in Java.

Immutable

Mutable

28 / 60

Boolean type holds:

‘T’ or ‘F’

1 or 0

Yes or No

true or false

29 / 60

for loop repeats until:

Condition is false

Condition is true

30 / 60

!(5 == 5) results in:

true

false

31 / 60

Which declares an integer variable correctly?

var int;

num int;

int num;

integer num;

32 / 60

Type of Margin in notepad ?

33 / 60

Random number function:

rand()

Math.random()

Math.rand()

random.Math()

34 / 60

Syntax of if statement:

if{condition}( )

if:condition

if(condition){ }

None

35 / 60

Nested if means:

Multiple ifs inside another if

Only one if

36 / 60

Math.pow(2,4) equals:

37 / 60

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

start()

run()

main()

init()

38 / 60

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

Java10

55Java

10Java

Error

39 / 60

Variables store ______.

Data values

Operators

Keywords

Classes

40 / 60

Math.sqrt(25) returns:

Error

41 / 60

Comments are used for:

Debugging only

Errors

Execution

Documentation

42 / 60

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

output()

println()

print()

write()

43 / 60

Multi-line comments start with:

/**

44 / 60

Java was developed by ______.

Apple

Microsoft

Oracle

Sun Microsystems

45 / 60

Correct declaration:

new array[3];

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

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

array arr[] = new int;

46 / 60

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

Invalid

Valid

47 / 60

System.out.println(“A”+”B”); prints:

Error

A B

A+B

48 / 60

To compare two strings:

compare()

match()

equals()

49 / 60

Which is the assignment operator?

50 / 60

Math.abs(-8) returns:

-8

Error

51 / 60

Single-line comments use:

/* */

<!– –>

52 / 60

Which is widening conversion?

double → int

float → byte

long → short

int → double

53 / 60

Increment operator is:

inc

54 / 60

Default value of an int variable is:

undefined

null

55 / 60

To find length of a String:

size(str)

str.size()

str.count()

str.length()

56 / 60

Which loop executes fixed number of times?

do-while

while

All of the above

for

57 / 60

Which of these is correct syntax?

system.out.println("Hi");

println("Hi");

System.out.println("Hi");

echo("Hi");

58 / 60

Which is not a primitive type?

char

String

int

float

59 / 60

Size of double type is:

4 bytes

2 bytes

8 bytes

16 bytes

60 / 60

Converting one data type into another is called:

Typecasting

Promotion

Evaluation

Conversion

Your score is

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