Java Data Types and Variables - MCQ - Quiz

Q: Determine output:

class A{
        public static void main(String args[]){
	        int x;
 	        x = 10;
	        if(x == 10){
		        int y = 20;
		        System.out.print("x and y: "+ x + " " + y);
		        y = x*2;
	        }
	        y = 100;
	        System.out.print("x and y: " + x + " " + y);
        }
}

A. 10 20 10 100
B. 10 20 10 20
C. 10 20 10 10
D. Error

Correct Option: D
Remarks:

Explanation: Error

Q: Determine output:

public class Test {
        static void test(float x){
                System.out.print("float");
        }

        static void test(double x){
                System.out.print("double");
        }

        public static void main(String[] args){
                test(99.9);
        }
}

A. float
B. double
C. Compilation Error
D. Exception is thrown at runtime

Correct Option: B
Remarks:

Explanation: double

Q: What is the output of the following program?

public class Test{
	static int x  = 10 ;
       	public static void main(String[] a){
		 Test test = new Test( ) ; 
		 Test test1 = new Test( ) ;
		 test.x  +=  1 ;
		 System.out.println(  test.x + test1.x ) ;    
	}
}

A. 20
B. 21
C. 22
D. Compilation Error

Correct Option: C
Remarks:

Explanation: 22

Q: In Java, the word true is ................

A. A Java keyword
B. A Boolean literal
C. Same as value 1
D. Same as value 0

Correct Option: B
Remarks:

Explanation: A Boolean literal

Q: What will the output of the following program?

public class Test{
      public static void main(String args[]){
            float f = (1 / 4) * 10;
            int i = Math.round(f);
            System.out.println(i);
      }
}

A. 2
C. 3
D. 2.5

Correct Option: B
Remarks:

Explanation: 0

Q: Range of Byte Data Type is ____________.

A. -128 to 256
B. -127 to 128
C. -128 to 255
D. -128 to 127

Correct Option: D
Remarks:

Explanation: -128 to 127

Q: Primitive data type 'long' is having size _______ byte(s) in Java Programming.

A. 2
B. 4
C. 8
D. 1

Correct Option: C
Remarks:

Explanation: 8

Q: Default value of "double" data type is ___________.

B. 0.0
C. null
D. 0.0d

Correct Option: D
Remarks:

Explanation: 0.0d

Q: Default value of character data type in Java Programming is ___________________.

A. '\u0000'
B. undefine
C. null

Correct Option: A
Remarks:

Explanation: '\u0000'

Q: Which of the following Class is used to wrap boolean value?

A. None of these
B. java.lang.Boolean
C. java.util.Boolean
D. java.io.Boolean

Correct Option: B
Remarks:

Explanation: java.lang.Boolean

Java Data Types and Variables - MCQ - Quiz

Determine output:
class A{ public static void main(String args[]){ int x; x = 10; if(x == 10){ int y = 20; System.out.print("x and y: "+ x + " " + y); y = x*2; } y = 100; System.out.print("x and y: " + x + " " + y); } }

Determine output:
public class Test { static void test(float x){ System.out.print("float"); } static void test(double x){ System.out.print("double"); } public static void main(String[] args){ test(99.9); } }

What is the output of the following program?
public class Test{ static int x = 10 ; public static void main(String[] a){ Test test = new Test( ) ; Test test1 = new Test( ) ; test.x += 1 ; System.out.println( test.x + test1.x ) ; } }

In Java, the word true is ................

What will the output of the following program?
public class Test{ public static void main(String args[]){ float f = (1 / 4) * 10; int i = Math.round(f); System.out.println(i); } }

Range of Byte Data Type is ____________.

Primitive data type 'long' is having size _______ byte(s) in Java Programming.

Default value of "double" data type is ___________.

Default value of character data type in Java Programming is ___________________.

Which of the following Class is used to wrap boolean value?

Java Data Types and Variables - MCQ - Quiz

Determine output: class A{ public static void main(String args[]){ int x; x = 10; if(x == 10){ int y = 20; System.out.print("x and y: "+ x + " " + y); y = x*2; } y = 100; System.out.print("x and y: " + x + " " + y); } }

Determine output: public class Test { static void test(float x){ System.out.print("float"); } static void test(double x){ System.out.print("double"); } public static void main(String[] args){ test(99.9); } }

What is the output of the following program? public class Test{ static int x = 10 ; public static void main(String[] a){ Test test = new Test( ) ; Test test1 = new Test( ) ; test.x += 1 ; System.out.println( test.x + test1.x ) ; } }

In Java, the word true is ................

What will the output of the following program? public class Test{ public static void main(String args[]){ float f = (1 / 4) * 10; int i = Math.round(f); System.out.println(i); } }

Range of Byte Data Type is ____________.

Primitive data type 'long' is having size _______ byte(s) in Java Programming.

Default value of "double" data type is ___________.

Default value of character data type in Java Programming is ___________________.

Which of the following Class is used to wrap boolean value?

Determine output:
class A{ public static void main(String args[]){ int x; x = 10; if(x == 10){ int y = 20; System.out.print("x and y: "+ x + " " + y); y = x*2; } y = 100; System.out.print("x and y: " + x + " " + y); } }

Determine output:
public class Test { static void test(float x){ System.out.print("float"); } static void test(double x){ System.out.print("double"); } public static void main(String[] args){ test(99.9); } }

What is the output of the following program?
public class Test{ static int x = 10 ; public static void main(String[] a){ Test test = new Test( ) ; Test test1 = new Test( ) ; test.x += 1 ; System.out.println( test.x + test1.x ) ; } }

What will the output of the following program?
public class Test{ public static void main(String args[]){ float f = (1 / 4) * 10; int i = Math.round(f); System.out.println(i); } }