Primitive Types Practice Questions

AP (Advanced Placement) · AP Computer Science A · 148 free MCQs with instant results and detailed explanations.

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Sample Questions from Primitive Types

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Easy

What is the default value of a boolean variable in Java?

A. true

B. false

C. null

D. 0

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Correct Answer: B

In Java, the default value of a boolean variable when declared but not initialized is 'false'.

Easy

Which of the following statements correctly assigns an integer value to a variable?

A. int num = '5';

B. int num = 5.0;

C. int num = 5;

D. int num = 5.5;

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Correct Answer: C

The statement 'int num = 5;' correctly assigns an integer value to the variable 'num'. Other options are invalid assignments for an integer type.

Easy

What will be the result of the following expression: 10 / 3 in Java?

A. 3.0

B. 3

C. 3.33

D. 10/3

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Correct Answer: B

In Java, the expression '10 / 3' uses integer division, which results in 3, discarding any fractional part.

Medium

What will be the output of the following code snippet? int x = 5; System.out.println(x * 2 + x / 2);

A. 10

B. 12

C. 15

D. 13

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Correct Answer: B

The expression evaluates as follows: x * 2 is 10, x / 2 is 2 (integer division), so 10 + 2 equals 12.

Medium

If int a = 10 and int b = 3, what will be the result of a % b?

A. 1

B. 3

C. 0

D. 10

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Correct Answer: A

The modulus operator (%) returns the remainder of the division. 10 divided by 3 gives a remainder of 1.

Medium

Which of the following statements about the primitive type 'char' is true?

A. It can store any Unicode character.

B. It can only store lowercase letters.

C. It is 2 bytes in size.

D. It cannot represent numerical values.

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Correct Answer: C

In Java, the char type is a 16-bit Unicode character, which means it is 2 bytes in size.

Medium

What will be the value of 'y' after executing the code: int x = 5; double y = 2 * x + 1;

A. 10

B. 11.0

C. 11

D. 12

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Correct Answer: B

The expression 2 * x evaluates to 10, and adding 1 gives 11. When assigned to a double, it retains its decimal representation.

Hard

Consider the following Java code: boolean x = true; boolean y = false; boolean z = false; boolean result = x && (y || z); System.out.println(result); What will be the output of this code?

A. true

B. false

C. null

D. Compilation error

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Correct Answer: B

The expression 'y || z' evaluates to false because both y and z are false. Therefore, 'x && false' evaluates to false, which is the value of result.

Hard

What will be the result of the following code? ```java boolean a = true; boolean b = false; boolean c = a && b; System.out.println(c); ``` A) true B) false C) null D) Compilation Error

A. true

B. false

C. null

D. Compilation Error

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Correct Answer: B

The logical AND operator (&&) returns true only if both operands are true. Since 'a' is true and 'b' is false, the result c will be false.

Q10

Hard

Consider the following code snippet: ```java byte x = 10; byte y = 20; int z = x * y; System.out.println(z); ``` What will be the output of this code?

A. 200

B. 30

C. 10

D. Error

Show Answer & Explanation

Correct Answer: A

In Java, when performing arithmetic operations, byte values are promoted to int. Therefore, multiplying x (10) and y (20) results in 200, which is stored in the int variable z. The output will be 200.

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Primitive Types — AP (Advanced Placement) AP Computer Science A Practice Questions Online

This page contains 148 practice MCQs for the chapter Primitive Types in AP (Advanced Placement) AP Computer Science A. The questions are organized by difficulty — 47 easy, 79 medium, 22 hard — so you can choose the right level for your preparation.

Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit.