Java Data Types and Variables - MCQ - Quiz

Q: Determine output:

public class Test{
	int i = 34;
	public static void main(String args[]){
		Test t1 = new Test();
		Test t2 = new Test();
		t1.i = 65;
		System.out.print(t1.i);
		System.out.print(t2.i);
	}
}

A. 34 34
B. 65 34
C. 65 65
D. 34 65

Correct Option: B
Remarks:

Explanation: 65 34

Q: What is the output for the below code?

public class Test{
      int _$;
      int $7;
      int do;

      public static void main(String argv[]){
            Test test = new Test();
            test.$7=7;
            test.do=9;
            System.out.println(test.$7);
            System.out.println(test.do);
            System.out.println(test._$);
      }
}

A. 7 9 0
B. Compile error - $7 is not valid identifier.
C. 7 0 0
D. Compile error - do is not valid identifier.

Correct Option: D
Remarks:

Explanation: Compile error - do is not valid identifier.

Q: Which of the following is smallest integer data type?

A. long
B. int
C. short
D. byte

Correct Option: D
Remarks:

Explanation: byte

Q: Which of the following is not a primitive data type?

A. int
B. short
C. byte
D. enum

Correct Option: D
Remarks:

Explanation: enum

Q: Byte variables are declared by use of the ____________ keyword (Using Primitive Data Type).

A. Bytes
B. byte
C. Byte
D. bytes

Correct Option: B
Remarks:

Explanation: byte

Q: What is size of integer in Java Programming.

A. 3 Bytes
B. 4 Bytes
C. 2 Bytes
D. 8 Bytes

Correct Option: B
Remarks:

Explanation:

In Java programming, the primitive data type int has a size of 4 bytes. This means it occupies 32 bits of memory. The int data type is a signed integer type, and it can represent values in the range from -2,147,483,648 to 2,147,483,647 (inclusive). The range is calculated as

-2³¹ to 2³¹ -1

The default value for an int variable is 0.

Q: Default value of variable having boolean data type is ___________.

A. 1
B. true
D. false

Correct Option: D
Remarks:

Explanation: false

Q: Default value of String (or any object) in Java Programming is _____________.

B. false
C. '\u0000'
D. null

Correct Option: D
Remarks:

Explanation: null

Q: Compiler never assigns a default value to an uninitialized local variable in Java Programming !!

A. True Statement
B. False Statement

Correct Option: A
Remarks:

Explanation: True Statement

Q: is used to construct the __________ .

public Boolean (boolean value)

A. None of these
B. Boolean Object
C. Floating Object
D. Integer Object

Correct Option: B
Remarks:

Explanation: Boolean Object

Java Data Types and Variables - MCQ - Quiz

Determine output:
public class Test{ int i = 34; public static void main(String args[]){ Test t1 = new Test(); Test t2 = new Test(); t1.i = 65; System.out.print(t1.i); System.out.print(t2.i); } }

What is the output for the below code?
public class Test{ int _$; int $7; int do; public static void main(String argv[]){ Test test = new Test(); test.$7=7; test.do=9; System.out.println(test.$7); System.out.println(test.do); System.out.println(test._$); } }

Which of the following is smallest integer data type?

Which of the following is not a primitive data type?

Byte variables are declared by use of the ____________ keyword (Using Primitive Data Type).

What is size of integer in Java Programming.

Default value of variable having boolean data type is ___________.

Default value of String (or any object) in Java Programming is _____________.

Compiler never assigns a default value to an uninitialized local variable in Java Programming !!

is used to construct the __________ .
public Boolean (boolean value)

Java Data Types and Variables - MCQ - Quiz

Determine output: public class Test{ int i = 34; public static void main(String args[]){ Test t1 = new Test(); Test t2 = new Test(); t1.i = 65; System.out.print(t1.i); System.out.print(t2.i); } }

What is the output for the below code? public class Test{ int _$; int $7; int do; public static void main(String argv[]){ Test test = new Test(); test.$7=7; test.do=9; System.out.println(test.$7); System.out.println(test.do); System.out.println(test._$); } }

Which of the following is smallest integer data type?

Which of the following is not a primitive data type?

Byte variables are declared by use of the ____________ keyword (Using Primitive Data Type).

What is size of integer in Java Programming.

Default value of variable having boolean data type is ___________.

Default value of String (or any object) in Java Programming is _____________.

Compiler never assigns a default value to an uninitialized local variable in Java Programming !!

is used to construct the __________ . public Boolean (boolean value)

Determine output:
public class Test{ int i = 34; public static void main(String args[]){ Test t1 = new Test(); Test t2 = new Test(); t1.i = 65; System.out.print(t1.i); System.out.print(t2.i); } }

What is the output for the below code?
public class Test{ int _$; int $7; int do; public static void main(String argv[]){ Test test = new Test(); test.$7=7; test.do=9; System.out.println(test.$7); System.out.println(test.do); System.out.println(test._$); } }

is used to construct the __________ .
public Boolean (boolean value)