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Java Multiple Choice Questions For Beginners - 25

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Question: 25

Arrays is a group of similar type of datatype

(A) True
(B) False

Level: Beginner Category of MCQ: other

Question: 26

Java supports single-line and multi-line comments very similar to C and C++

(A) True
(B) False

Level: Beginner Category of MCQ: other

Question: 27

public class Main
{
public static void main(String[] args) {

               int arr[] = {1,2,3,4,5};
	    
		for(int i = 0 ; i<5; i++){ 
                   System.out.print(arr[i++]);
		}
	}
}

(A) 12345
(B) 123
(C) 124
(D) 135

Level: Beginner Category of MCQ: arrays

Question: 28

public class Main
{
public static void main(String[] args) {
	    int arr[] = {1,2,3,4,5};
	    
		for(int i = 0 ; i<5; ){
		    System.out.print(arr[i]);
		}
	}
}

(A) 12345
(B) Nothing is printed
(C) 1
(D) Infinite times

Level: Beginner Category of MCQ: arrays

Question: 29

public class Main
{
public static void main(String[] args) {

	    int arr[] = {1,2,3,4,5};

	    int count = 0;

		for(int i = 0 ; i<5; i++ ){
		    if(arr[i]%2==0)
		        count++;
		}
		System.out.print(count);
	}
}

(A) 3
(B) 2
(C) 1
(D) 0

Level: Beginner Category of MCQ: arrays

Question: 30

public class Main
{
public static void main(String[] args) {
	    
            int arr[] = {1,2,3,4,5};
	    int count = 0;

		for(int i = 0 ; i<5; i++ ){
		    if(arr[i]%2==0)
		        arr[i] *= 2;
		    System.out.print(arr[i]);      
		}
		
	}
}

(A) 12345
(B) 135
(C) 22222
(D) 14385

Level: Beginner Category of MCQ: arrays

Question: 31

public class Main
{
public static void main(String[] args) {
   
     int arr[] = {'a','b','c','d','e'};
   
    System.out.print(arr);
}
}

(A) abcde
(B) 6566676869
(C) Compilation Error
(D) Some Garbage Value

Level: Beginner Category of MCQ: arrays

Question: 32

public class Main
{
private int a;
public Main(){
            a = -10;
        }
  
public static void main(String[] args) {
	Main obj = new Main();
 	System.out.println(obj.a);
	}
}

(A) 0
(B) Compilation Error
(C) -10
(D) Garbage Value

Level: Beginner Category of MCQ: classesAndobjects

Question: 33

What is default value of variable a in following code?

public class Main
{
private int a;

public static void main(String[] args) {
    Main obj = new Main();
	System.out.println(obj.a);
}
}

(A) Garbage Value
(B) Code has compilation error
(C) null
(D) 0

Level: Beginner Category of MCQ: variables

Question: 34

What should be value of variable a?
 public class Main
{
public static void main(String[] args) {
    int a;
    System.out.println(a);
}
}

(A) Garbage Value
(B) 0
(C) Undefind
(D) Compilation Error

Level: Beginner Category of MCQ: variables

Question: 35

public class Main
{
private int a;    

public Main(){
    a = 10;
}

public static void main(String[] args) {
    Main obj = new Main();
    obj.a = -10;
    System.out.println(obj.a);
}
}

(A) 0
(B) 10
(C) -10
(D) Compilation Error

Level: Beginner Category of MCQ: classesAndobjects

Question: 36

public class Main
{

public static void main(String[] args) {
    final int a = 5;
    a = 10;
    System.out.println(a);
}

}

(A) 5
(B) 10
(C) Error: Can't assign a value to final variable a
(D) None of the above

Level: Beginner Category of MCQ: variables

Question: 37

public class Main
{
public static void main(String[] args) {
    final int a;
    a = 10;
    System.out.println(a);
}
}

(A) 0
(B) 10
(C) Undefind
(D) Error: Can't modify final variable a

Level: Beginner Category of MCQ: variables

Question: 38

public class Main
{
public static void main(String[] args) {
    final int a;
    a = 5;
    a = 10;
    System.out.println(a);
}
}

(A) 5
(B) 10
(C) 0
(D) Error: variable a might already have been assigned

Level: Beginner Category of MCQ: variables

Question: 39

How many times 'cppbuzz' is printed?
public class Main
{
public static void main(String[] args) {
	while(true){
	    System.out.println("cppbuzz");
		}
	}
}

(A) 1
(B) 2
(C) Compilation Error
(D) Infinite times

Level: Beginner Category of MCQ: loops

Question: 40

How many times 'cppbuzz' is printed?

public class Main
{
public static void main(String[] args) {
	while(false){
	    System.out.println("cppbuzz");
	}
}
}

(A) 0
(B) 1
(C) Infinite Times
(D) Error: Unreachable Statement

Level: Beginner Category of MCQ: loops

Question: 41

How many time 'cppbuzz' is printed?

public class Main
{
public static void main(String[] args) {
	while(true);{
        System.out.println("cppbuzz");
	}
	}
}

(A) Infinite times
(B) 0 times
(C) 1 time
(D) error: unreachable statement

Level: Beginner Category of MCQ: loops

Question: 42

How many times 'cppbuzz' is printed?

public class Main
{
public static void main(String[] args) {
     while(true){
       System.out.println("cppbuzz");
     break;
    }
}
}

(A) Infinite times
(B) 0
(C) 1
(D) error: unreachable statement

Level: Beginner Category of MCQ: loops

Question: 43

How many times 'cppbuzz' is printed?

public class Main
{
public static void main(String[] args) {
        do{
	    System.out.println("cppbuzz");
	}while(false);
	}
}

(A) 0
(B) 1
(C) Infinite Times
(D) Compilation Error

Level: Beginner Category of MCQ: loops

Question: 44

public class Main
{

public static void sum(int a, int b){
        System.out.print(a+b);
    }

public static void main(String[] args) {
		sum(0,0);
		sum(-1,-1);
	}
}

(A) 00
(B) 0-1
(C) 0-2
(D) -2

Level: Beginner Category of MCQ: methods

Question: 45

public class Main
{
    public static int sum(int a, int b){
       System.out.print(a+""+b);
       return a+b;
    }
    
   public static void main(String[] args) {
     System.out.println(sum(3, sum(1,2)));
  }
}

(A) 32136
(B) 33126
(C) 12336
(D) 63321

Level: Beginner Category of MCQ: methods

Question: 46

public class Main
{
    public static int sum(int a, int b){
       if(a+b>1)
         return 0;
       System.out.print(a+b);
       return a+b;
    }
    
    public static void main(String[] args) {
        System.out.println(sum(1, sum(0,1)));
	}
}

(A) 12
(B) 01
(C) 11
(D) 10

Level: Beginner Category of MCQ: methods

Question: 47

Can we call non static methods of a class by static methods of a class without creating object?

(A) Yes
(B) No

Level: Beginner Category of MCQ: methods

Question: 48

public class Main
{   
public static void main(String[] args) {
		String str = "1234";
		int a = Integer.parseInt(str);
		System.out.println(a);
	}
}

(A) 123
(B) 1234
(C) 12340
(D) Compilation Error

Level: Beginner Category of MCQ: typecasting

Question: 49

public class Main
{   
public static void main(String[] args) {
	String str = "1234.34";
	int a = Integer.parseInt(str);
	System.out.println(a);
}
}

(A) 1234.34
(B) 1234
(C) .1234.00
(D) NumberFormatException

Level: Beginner Category of MCQ: typecasting

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Java Multiple Choice Questions For Beginners - 25

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