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Java Interview Questions on Methods - 25

Question: 1

Java program processing always starts with main() method

(A) True
(B) False

Level: Beginner Category of MCQ: methods

Question: 2

The main() method of an application has to be public. Otherwise, it could not be called by a Java interpreter. Is that true?

(A) True
(B) False

Level: Beginner Category of MCQ: methods

Question: 3

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: 4

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

(A) -2
(B) 0-1
(C) 0-2
(D) error: non-static method can't be called

Level: Practitioner Category of MCQ: methods

Question: 5

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

(A) Compilation Error
(B) 3
(C) 5
(D) 6

Level: Practitioner Category of MCQ: methods

Question: 6

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(sum(1,2),3));		
    }
}

(A) 63321
(B) 36
(C) 33
(D) 12336

Level: Expert Category of MCQ: methods

Question: 7

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: 8

public class Main
{
    public static int sum(int a, int b){
       if(a+b>10)
       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) 123456789
(B) 12345678
(C) 122
(D) None of the above

Level: Expert Category of MCQ: methods

Question: 9

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: 10

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: 11

public class Main
{
public static void main(String[] args) {
    String input = " ";
    System.out.println("-"+input.trim()+"-");
}
}

(A) Compilation Error
(B) Exception
(C) - -
(D) --

Level: Practitioner Category of MCQ: methods

Question: 12

public class Main
{
public static void main(String[] args) {
    String input = null;
    System.out.println("-"+input.trim()+"-");
}
}

(A) -null-
(B) - -
(C) --
(D) java.lang.NullPointerException

Level: Expert Category of MCQ: methods

Question: 13

public class Main
{
public static void main(String[] args) {
    String input = "";
    System.out.println("-"+input.trim().trim()+"-");
}
}

(A) Compilation Error
(B) Exception
(C) --
(D) - -

Level: Expert Category of MCQ: methods

Question: 14

public class Main
{
public static void main(String[] args) {
    String input = " cpp buzz chicago ";
    input = input.trim();
    System.out.println(input.length());
}
}

(A) 3
(B) 5
(C) 18
(D) 16

Level: Practitioner Category of MCQ: methods

Question: 15

public class Main
{
public static void main(String[] args) {
    String input = " cppbuzz ";
    input = input.trim();
    System.out.print(input.length());
    input= input + " ";
    input= input + " ";
    System.out.print(input.length());
}
}

(A) 77
(B) 78
(C) 79
(D) 710

Level: Expert Category of MCQ: methods

Question: 16

public class Main
{
public static void main(String[] args) {
    String input = "
cppbuzz
";
    input = input.trim();
    System.out.print(input.length());
}
}

(A) 7
(B) 8
(C) 9
(D) 10

Level: Expert Category of MCQ: methods

Question: 17

public class Main
{
public static void main(String[] args) {
    String input = "the cppbuzz";
    input = input.replace("the", " ");
    input = input.trim();
    System.out.print(input.length());
}
}

(A) 7
(B) 8
(C) 9
(D) 10

Level: Practitioner Category of MCQ: methods

Question: 18

public class Main
{
public static int i = 5;  

public static void main(String[] args) {
 decrement();
 decrement();
 decrement();
}
	
public static void decrement()
{
 System.out.print(i);
 i--;
}

}

(A) 555
(B) 544
(C) 554
(D) 543

Level: Practitioner Category of MCQ: methods

Question: 19

What is the output of below program if nothing is passed as argument to main()?

public class Main
{
	public static void main(String[] args) {
		System.out.println(args[1]);
	}
}

(A) null
(B) Nothing is printed
(C) Compilation Error
(D) ArrayIndexOutOfBoundsException

Level: Practitioner Category of MCQ: methods

Question: 20

Find the output of Java program -

public class Main
{   
    public static int a(){
        
        return 65;
    }
    
    public int b(){
        
        return a();
    }
	public static void main(String[] args) {
		System.out.print("AT&T Lab");
	}
}

(A) AT&T Lab65
(B) AT&T Lab 65
(C) AT&T Lab
(D) Compilation Error

Level: Practitioner Category of MCQ: methods

Question: 21

Find the output of below Java program-

public class Main
{   
    public static int a(){
        
        return 65;
    }
    
    public static int b(){
        
        return a();
    }
	public static void main(String[] args) {
		System.out.print(""+b());
	}
}

(A) 6565
(B) 65
(C) "65"
(D) None of the above

Level: Practitioner Category of MCQ: methods

Question: 22

Find the output of below Java program -

public class Main
{   
    static int i = 0;
    
    public static int a(){
        String [] arr = null;
        main(arr);
        return 65;
    }
    
    public static int b(){
        
        return a();
    }
	public static void main(String[] args) {
	    
	    if(i>0) return;
	    i++;    
		System.out.print(""+b());
		
	
	}
}

(A) 65 & Infinite loop
(B) 65
(C) Nothing is printed
(D) Compilation Error

Level: Expert Category of MCQ: methods

Question: 23

public class Main
{

public static void main(String[] args) {
     
    System.out.print(2>4?"Hi":"Hello");
    
     }

(A) Compilation Error
(B) Exception
(C) Hi
(D) Hello

Level: Practitioner Category of MCQ: methods

Question: 24

public class Main
{
    public static void function(int temp){
        temp*=2;
    }
    public static void main(String[] args) {
        int a = 10;
	function(a);
	System.out.print(a);
    }
	
}

(A) 20
(B) 10
(C) Compilation Error
(D) None of the above

Level: Practitioner Category of MCQ: methods

Question: 25

public class Main {
 String name;
 
 Main(String n) {
 name = n;
 }
 
 public static void main(String[] args) {
 Main ref1 = new Main("laptop");
 Main ref2 = new Main("tv");
 System.out.println(ref2.equals(ref1));
 }
 
 public boolean equals(Object o) {
 Main m = (Main) o;
 if (m.name != null) {
 return true;
 }
 return false;
 }
 
}

(A) true
(B) false
(C) Compilation Error
(D) None of the above

Level: Practitioner Category of MCQ: methods

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Java Interview Questions on Methods - 25

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