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Java Interview Questions on Datat ypes - 8

Question: 1

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

(A) 10
(B) 11
(C) 12
(D) Compilation Error

Level: Expert Category: datatype
[Posted by: Admin | Chicago, USA]

Question: 2

Java supports both Primitive & Non-Primitive(User Defined) datatypes. Which one of the following is not a primitive datatype?

(A) byte
(B) short
(C) long
(D) class

Level: Beginner Category: datatype
[Posted by: Admin | Chicago, USA]

Question: 3

In Java every data type requires some bytes of memory, How many bytes void data type requires?

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

Level: Beginner Category: datatype
[Posted by: Admin | Chicago, USA]

Question: 4

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

(A) 'a'
(B) a
(C) 65
(D) 97

Level: Practitioner Category: datatype
[Posted by: Admin | Chicago, USA]

Question: 5

Find the output of below Java program:

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

}

(A) 10
(B) 0
(C) Error in Code
(D) Nothing is printed

Level: Beginner Category: datatype
[Posted by: Admin | Chicago, USA]

Question: 6

import java.util.*;

public class Main {
 public static void main(String[] args) {
 List p = new ArrayList();
 p.add(7);
 p.add(1);
 p.add(5);
 p.add(1);
 p.remove(1);
 System.out.println(p);
 }
}

(A) [7,1,5]
(B) [7,5,1]
(C) [7, 1, 5, 1]
(D) None of the above

Level: Beginner Category: datatype
[Posted by: Admin | Chicago, USA]

Question: 7

import java.util.*;
public class Main {
 public static void main(String[] args) {
 List<String> items = new ArrayList<>();
 items.add("Pen");
 items.add("Pencil");
 items.add("Box");
 for (String i : items) {
 if (i.indexOf("P") == 0) {
 continue;
 } else {
 System.out.print(i+" ");
 }
 }
 }
}

(A) Pen Pencil Box
(B) Pen Pencil
(C) Box
(D) Compilation Error

Level: Beginner Category: datatype
[Posted by: Admin | Chicago, USA]

Question: 8

What is the output of the program?
public class Main{
public static void main(String[] args){
int j;
System.out.println(j);
}
}

(A) 0
(B) Garbage Value
(C) Compiler Error
(D) Runtime Error

Level: Beginner Category: datatype
[Posted by: Jagroop Singh | India]

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Java Interview Questions on Datat ypes - 8

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