Intro: Arithmetic Expressions

Which operator returns the remainder after integer division?

• /

• *

• -

• %

Answer explanation

The % operator is the modulus operator; it returns the leftover remainder after dividing two integers. The / operator returns the quotient, not the remainder.

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Blooms Level: Remember

What is the result of 7 / 2 in Java when both values are int?

• 3.5 (decimal result)

• 4 (rounded up)

• 3 (truncated)

• 2 (remainder only)

Answer explanation

Integer division in Java truncates toward zero, so 7 / 2 produces 3. To get 3.5, at least one operand must be a float or double.

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Blooms Level: Apply

Which compound assignment operator subtracts a value from a variable?

• =-

• -=

• --=

• -%

Answer explanation

The -= operator subtracts the right operand from the variable and stores the result. The -- operator decrements by one but is not a compound assignment operator.

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Blooms Level: Remember

What does x *= 3; do when x is currently 4?

• Sets x to 3

• Sets x to 7

• Sets x to 1

• Sets x to 12

Answer explanation

The *= operator multiplies the variable by the right operand and stores the result; 4 * 3 equals 12. A common mix-up is reading *= as addition rather than multiplication.

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Blooms Level: Apply

In Java, which operation is evaluated first in the expression 2 + 3 * 4?

• 2 + 3 (left to right)

• 3 * 4 (precedence)

• 2 + 12 (addition first)

• All operations equally

Answer explanation

Multiplication has higher precedence than addition, so 3 * 4 is evaluated first, giving a final result of 14, not 20.

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Blooms Level: Remember

What is the value of result after: int result = 10 + 2 * 5 - 3;

• 20

• 57

• 15

• 17

Answer explanation

Multiplication runs first: 2 * 5 = 10, then left to right: 10 + 10 - 3 = 17. Evaluating strictly left to right without precedence gives the wrong answer of 57.

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Blooms Level: Apply

Which expression correctly uses the addition compound assignment operator?

• Total + = price

• Total =+ price

• Total => price

• Total += price

Answer explanation

The += operator adds the right operand to the variable in one step. Writing =+ is a common mistake; it assigns a positive value rather than adding to the existing one.

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Blooms Level: Remember

What is the result of 15 % 4 in Java?

• 2

• 3

• 4

• 1

Answer explanation

15 divided by 4 is 3 with a remainder of 3, so 15 % 4 equals 3. The % operator returns the remainder, not the quotient.

Tags

Blooms Level: Apply