Java 60 MCQS Question paper Online Test Series 5251

Java MCQ question Paper Basic To Advanced

1 / 60

Correct declaration:

array arr[] = new int;

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

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

new array[3];

2 / 60

Array index starts from:

3 / 60

String class belongs to package:

java.util

java.lang

java.string

java.io

4 / 60

Random number function:

random.Math()

rand()

Math.random()

Math.rand()

5 / 60

Which declares an integer variable correctly?

integer num;

var int;

int num;

num int;

6 / 60

Boolean can store:

T/F

Yes/No

true/false

1/0

7 / 60

Syntax of if statement:

None

if{condition}( )

if(condition){ }

if:condition

8 / 60

The modulus operator is:

9 / 60

Which package is required for Scanner?

java.util.*

java.lang.*

java.scanner.*

java.io.*

10 / 60

To compare two strings:

match()

equals()

compare()

11 / 60

Every case label must end with:

exit;

;

break;

stop;

12 / 60

The extension of Java source files is ______.

.java

.jar

.class

.jav

13 / 60

Who is known as the father of Java?

Dennis Ritchie

Guido van Rossum

James Gosling

Bjarne Stroustrup

14 / 60

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

true/false

false/true

true

false

15 / 60

Nested if means:

Multiple ifs inside another if

Only one if

16 / 60

switch works with:

boolean only

double

int, char, String

float

17 / 60

Variables store ______.

Data values

Classes

Operators

Keywords

18 / 60

Java is ______ typed.

Statically

Loosely

Dynamically

Weakly

19 / 60

To get array length:

Alm(544)

length(arr)

arr.length

arr.size()

20 / 60

To find length of a String:

size(str)

str.count()

str.length()

str.size()

21 / 60

Default value of an int variable is:

undefined

null

22 / 60

Type of Margin in notepad ?

23 / 60

What executes when if condition is false?

if block

else block

24 / 60

Boolean type holds:

1 or 0

Yes or No

true or false

‘T’ or ‘F’

25 / 60

Default value of boolean is:

null

false

true

26 / 60

Infinite loop example:

for(;;)

while(true)

27 / 60

for loop repeats until:

Condition is false

Condition is true

28 / 60

System.out.println(“A”+”B”); prints:

A+B

A B

Error

29 / 60

Single-line comments use:

/* */

<!– –>

30 / 60

Math.sqrt(25) returns:

Error

31 / 60

Syntax of for loop:

for(init; condition; update)

All Of the above

for(init; update; condition)

for(condition; init; update)

32 / 60

default case in switch is:

Optional

Mandatory

33 / 60

Increment operator is:

inc

34 / 60

Multi-line comments start with:

/**

35 / 60

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

Valid

Invalid

36 / 60

Java statements end with a ______.

Comma

Period

Semicolon

Colon

37 / 60

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

output()

print()

println()

write()

38 / 60

Strings are ______ in Java.

Immutable

Mutable

39 / 60

Which loop executes fixed number of times?

for

while

do-while

All of the above

40 / 60

Java is a ______ language.

Interpreted

Compiled

None

Both

41 / 60

Which is the assignment operator?

42 / 60

Converting one data type into another is called:

Evaluation

Conversion

Promotion

Typecasting

43 / 60

Identifiers in Java are ______.

Numeric

Case-insensitive

Case-sensitive

Non-sensitive

44 / 60

Which requires explicit cast?

Widening

Narrowing

45 / 60

Which is widening conversion?

int → double

long → short

float → byte

double → int

46 / 60

What does System.out.print() do?

Stops program

Prints with newline

Prints without newline

Reads input

47 / 60

Logical AND is:

48 / 60

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

10Java

55Java

Java10

Error

49 / 60

Math.abs(-8) returns:

Error

-8

50 / 60

Java was developed by ______.

Apple

Oracle

Sun Microsystems

Microsoft

51 / 60

Static variables are shared by ______.

One object only

One method

None

All objects

52 / 60

Math.pow(2,4) equals:

53 / 60

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

start()

main()

init()

run()

54 / 60

Which keyword defines a class?

define

object

Class

class

55 / 60

Comments are used for:

Debugging only

Execution

Documentation

Errors

56 / 60

Which of these is correct syntax?

System.out.println("Hi");

println("Hi");

echo("Hi");

system.out.println("Hi");

57 / 60

Size of double type is:

16 bytes

8 bytes

2 bytes

4 bytes

58 / 60

Which performs multiplication?

mul

59 / 60

Which is not a primitive type?

char

int

float

String

60 / 60

!(5 == 5) results in:

false

true

Your score is

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