Java 60 MCQS Question paper Online Test Series 5251

Java MCQ question Paper Basic To Advanced

1 / 60

Comments are used for:

Documentation

Execution

Errors

Debugging only

2 / 60

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

false

true/false

true

false/true

3 / 60

Every case label must end with:

stop;

;

break;

exit;

4 / 60

Which loop executes fixed number of times?

do-while

for

while

All of the above

5 / 60

!(5 == 5) results in:

false

true

6 / 60

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

output()

write()

print()

println()

7 / 60

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

Valid

Invalid

8 / 60

Multi-line comments start with:

/**

9 / 60

Default value of an int variable is:

undefined

null

10 / 60

default case in switch is:

Mandatory

Optional

11 / 60

Array index starts from:

12 / 60

Single-line comments use:

/* */

<!– –>

13 / 60

String class belongs to package:

java.io

java.lang

java.util

java.string

14 / 60

Size of double type is:

8 bytes

16 bytes

4 bytes

2 bytes

15 / 60

What executes when if condition is false?

else block

if block

16 / 60

Nested if means:

Only one if

Multiple ifs inside another if

17 / 60

Java is a ______ language.

None

Interpreted

Both

Compiled

18 / 60

Default value of boolean is:

true

null

false

19 / 60

Math.sqrt(25) returns:

Error

20 / 60

switch works with:

double

boolean only

int, char, String

float

21 / 60

Which performs multiplication?

mul

22 / 60

Logical AND is:

23 / 60

Variables store ______.

Data values

Operators

Classes

Keywords

24 / 60

Which is widening conversion?

long → short

int → double

double → int

float → byte

25 / 60

Random number function:

rand()

random.Math()

Math.rand()

Math.random()

26 / 60

Which is the assignment operator?

27 / 60

To get array length:

length(arr)

arr.size()

arr.length

Alm(544)

28 / 60

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

start()

run()

main()

init()

29 / 60

Infinite loop example:

for(;;)

while(true)

30 / 60

Who is known as the father of Java?

Bjarne Stroustrup

Guido van Rossum

James Gosling

Dennis Ritchie

31 / 60

Which keyword defines a class?

class

define

object

Class

32 / 60

To find length of a String:

str.count()

str.length()

str.size()

size(str)

33 / 60

Increment operator is:

inc

34 / 60

To compare two strings:

equals()

compare()

match()

35 / 60

Boolean can store:

Yes/No

1/0

true/false

T/F

36 / 60

Math.abs(-8) returns:

-8

Error

37 / 60

Java statements end with a ______.

Colon

Semicolon

Comma

Period

38 / 60

Static variables are shared by ______.

All objects

None

One object only

One method

39 / 60

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

55Java

10Java

Java10

Error

40 / 60

Strings are ______ in Java.

Immutable

Mutable

41 / 60

Which declares an integer variable correctly?

num int;

integer num;

var int;

int num;

42 / 60

for loop repeats until:

Condition is true

Condition is false

43 / 60

Which of these is correct syntax?

println("Hi");

system.out.println("Hi");

System.out.println("Hi");

echo("Hi");

44 / 60

Which is not a primitive type?

char

float

int

String

45 / 60

Math.pow(2,4) equals:

46 / 60

Syntax of if statement:

if:condition

if(condition){ }

None

if{condition}( )

47 / 60

What does System.out.print() do?

Prints without newline

Stops program

Prints with newline

Reads input

48 / 60

Syntax of for loop:

for(condition; init; update)

for(init; update; condition)

All Of the above

for(init; condition; update)

49 / 60

Type of Margin in notepad ?

50 / 60

The extension of Java source files is ______.

.jav

.class

.jar

.java

51 / 60

Java is ______ typed.

Loosely

Statically

Dynamically

Weakly

52 / 60

Identifiers in Java are ______.

Numeric

Case-sensitive

Non-sensitive

Case-insensitive

53 / 60

Which package is required for Scanner?

java.lang.*

java.scanner.*

java.util.*

java.io.*

54 / 60

Which requires explicit cast?

Narrowing

Widening

55 / 60

The modulus operator is:

56 / 60

Correct declaration:

array arr[] = new int;

new array[3];

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

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

57 / 60

System.out.println(“A”+”B”); prints:

Error

A+B

A B

58 / 60

Boolean type holds:

true or false

1 or 0

Yes or No

‘T’ or ‘F’

59 / 60

Converting one data type into another is called:

Typecasting

Conversion

Evaluation

Promotion

60 / 60

Java was developed by ______.

Apple

Oracle

Microsoft

Sun Microsystems

Your score is

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