Javaquiz

Which one of the following is not a Java feature?

• Object-oriented

• Use of pointers

• Portable

• Dynamic and Extensible

What is the extension of byte code files?

• .java

• .class

• .byte

• .js

The Output of below code

int a=10;

int b=a++;

System.out.println(b);

• 10

• 11

• 12

The Output of below code

int a=10;

int b=++a;

System.out.println(b);

• 10

• 11

• 12

Output of the below statement

public static void main(String[] args) {

int x=5;

{

int y = 6;

System.out.print(x + " " + y);

}

System.out.println(x + " " + y);

}

• Runtime error

• Compilation error

• 5656

• 565

Output of the below code

class Box{

int width;

int height;

int length;

}

public class Day1 {

public static void main(String[] args) {

Box obj = new Box();

obj.width = 10;

obj.height = 2;

obj.length = 10;

int y = obj.width * obj.height *obj.length;

System.out.print(y);

}

• 400

• 100

• 200

• Runtime Error

Which of these keywords is used to define interfaces in Java?

• interface

• Interface

• InterFace

Output of the below code

Integer i = 257;

byte x = i.byteValue();

System.out.print(x);

• 257

• 1

• 0

• 256

Output of below code

ArrayList obj = new ArrayList();

obj.add("A");

obj.add("B");

obj.add("C");

obj.add(1, "D");

System.out.println(obj);

• [C, D, B, A]

• [D, A, B, C]

• [A, B, C, D]

• [A, D, B, C]

Which is the parent class of all exceptions?

• Throwable

• Exception

• Error