Java 60 MCQS Question paper Online Test Series 5251

Java MCQ question Paper Basic To Advanced

1 / 60

Converting one data type into another is called:

Promotion

Conversion

Typecasting

Evaluation

2 / 60

Increment operator is:

inc

3 / 60

Which declares an integer variable correctly?

integer num;

var int;

num int;

int num;

4 / 60

Java is a ______ language.

Compiled

None

Both

Interpreted

5 / 60

Infinite loop example:

for(;;)

while(true)

6 / 60

Boolean type holds:

true or false

1 or 0

Yes or No

‘T’ or ‘F’

7 / 60

Comments are used for:

Documentation

Execution

Debugging only

Errors

8 / 60

Which is the assignment operator?

9 / 60

for loop repeats until:

Condition is false

Condition is true

10 / 60

switch works with:

int, char, String

boolean only

float

double

11 / 60

Nested if means:

Multiple ifs inside another if

Only one if

12 / 60

Which is not a primitive type?

String

float

int

char

13 / 60

The modulus operator is:

14 / 60

Identifiers in Java are ______.

Non-sensitive

Case-sensitive

Numeric

Case-insensitive

15 / 60

Array index starts from:

16 / 60

Math.abs(-8) returns:

-8

Error

17 / 60

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

55Java

Java10

10Java

Error

18 / 60

Variables store ______.

Keywords

Data values

Operators

Classes

19 / 60

To find length of a String:

size(str)

str.count()

str.size()

str.length()

20 / 60

Which is widening conversion?

int → double

long → short

double → int

float → byte

21 / 60

Math.sqrt(25) returns:

Error

22 / 60

Strings are ______ in Java.

Mutable

Immutable

23 / 60

Syntax of if statement:

if:condition

if(condition){ }

None

if{condition}( )

24 / 60

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

output()

write()

println()

print()

25 / 60

default case in switch is:

Mandatory

Optional

26 / 60

Which loop executes fixed number of times?

while

All of the above

for

do-while

27 / 60

What executes when if condition is false?

else block

if block

28 / 60

Who is known as the father of Java?

Bjarne Stroustrup

Guido van Rossum

James Gosling

Dennis Ritchie

29 / 60

The extension of Java source files is ______.

.jar

.class

.jav

.java

30 / 60

Type of Margin in notepad ?

31 / 60

Static variables are shared by ______.

One object only

None

All objects

One method

32 / 60

Default value of an int variable is:

undefined

null

33 / 60

Logical AND is:

34 / 60

Which keyword defines a class?

Class

define

class

object

35 / 60

Which requires explicit cast?

Widening

Narrowing

36 / 60

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

Valid

Invalid

37 / 60

To compare two strings:

match()

compare()

equals()

38 / 60

To get array length:

length(arr)

arr.length

Alm(544)

arr.size()

39 / 60

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

init()

main()

run()

start()

40 / 60

Which package is required for Scanner?

java.lang.*

java.io.*

java.scanner.*

java.util.*

41 / 60

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

false

false/true

true/false

true

42 / 60

Java statements end with a ______.

Semicolon

Period

Comma

Colon

43 / 60

Single-line comments use:

<!– –>

/* */

44 / 60

Which of these is correct syntax?

println("Hi");

echo("Hi");

System.out.println("Hi");

system.out.println("Hi");

45 / 60

System.out.println(“A”+”B”); prints:

A B

Error

A+B

46 / 60

Correct declaration:

new array[3];

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

array arr[] = new int;

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

47 / 60

Java was developed by ______.

Apple

Sun Microsystems

Oracle

Microsoft

48 / 60

Java is ______ typed.

Loosely

Statically

Dynamically

Weakly

49 / 60

What does System.out.print() do?

Reads input

Prints with newline

Stops program

Prints without newline

50 / 60

!(5 == 5) results in:

false

true

51 / 60

Size of double type is:

16 bytes

2 bytes

4 bytes

8 bytes

52 / 60

Default value of boolean is:

true

null

false

53 / 60

Syntax of for loop:

for(condition; init; update)

for(init; update; condition)

All Of the above

for(init; condition; update)

54 / 60

Which performs multiplication?

mul

55 / 60

Boolean can store:

true/false

T/F

1/0

Yes/No

56 / 60

String class belongs to package:

java.string

java.lang

java.io

java.util

57 / 60

Multi-line comments start with:

/**

58 / 60

Every case label must end with:

;

exit;

stop;

break;

59 / 60

Random number function:

rand()

Math.random()

Math.rand()

random.Math()

60 / 60

Math.pow(2,4) equals:

Your score is

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