JAVA

Which component is used to compile, debug, and execute the Java programs?

• JRE

• JIT

• JDK

• JVM

Which one of the following is not a Java feature?

• Use of Pointers

• Object Oriented

• Portable

• Dynamic and executable

Which of these cannot be used for a variable name in Java?

• identifier

• & keyword identifier

• keyword

• none of the mentioned

What is the extension of java code files?

• .js

• .txt

• .class

• .java

What will be the output of the following Java code?

class increment

{

public static void main(String args[])

{

int g = 3;

System.out.print(++g * 8);

}

}

• 33

• 32

• 23

• 45

Which of the following is not an OOPS concept in Java?

• Polymorphism

• Inheritance

• Compilation

• Encapsulation

What will be the error in the following Java code?

byte b = 50;

b = b * 50;

• b cannot contain value 50

• b cannot contain value 100, limited by its range

• No error in this code

• * operator has converted b 50 into int, which can not be converted to byte without casting

What will be the output of the following Java program?

class leftshift_operator

{

public static void main(String args[])

{

byte x = 64;

int i;

byte y;

i = x << 2;

y = (byte) (x << 2);

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

}

}

• 256 0

• 0 256

• 64 0

• 0 64

What will be the output of the following Java code?

class box

{

int width;

int height;

int length;

}

class main

{

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);

}

}

• 100

• 200

• 300

• 400

What will be the output of the following Java program?

class Output

{

public static void main(String args[])

{

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

for ( int i = 0; i < arr.length - 2; ++i)

System.out.println(arr[i] + " ");

}

}

• 1 2

• 1 2 3 4

• 1 2 3

• 1