Answer: 2 When both operands are int, Java performs integer division and truncates toward zero, so 7 / 3 evaluates to 2.

Answer: 2 17 % 5 returns the remainder of 17 / 5, which is 2 (since 5 3 = 15 and 17 - 15 = 2).

What is wrong with this method?

Answer: Integer division truncates; cast at least one operand to double n / 2 performs integer division because both operands are int, so half(3) returns 1.0. Use (double) n / 2 or n / 2.0 to retain the fractional part.

AP Computer Science A · Topic 1.3

Expressions and Assignment Statements Practice

Part of Primitive Types.

Practice questions

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Sample questions

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Sample 1difficulty 2/5
```
int x = 7;
int y = 3;
System.out.println(x / y);
```
$What is printed?$
- A
  $2$
  check_circle
- B
  $2.33$
- C
  $2.0$
- D
  $2.333333$
Why
$When both operands are int, Java performs integer division and truncates toward zero, so 7 / 3 evaluates to 2.$
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Sample 2difficulty 2/5
```
int a = 17;
int b = 5;
System.out.println(a % b);
```
$What is printed?$
- A
  $2$
  check_circle
- B
  $3$
- C
  $3.4$
- D
  $0$
Why
$17 % 5 returns the remainder of 17 / 5, which is 2 (since 5 * 3 = 15 and 17 - 15 = 2).$
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Sample 3difficulty 2/5
```
public static double half(int n) {
    return n / 2;
}
```
$What is wrong with this method?$
- A
  $Division by 2 is undefined for negatives$
- B
  $Integer division truncates; cast at least one operand to double$
  check_circle
- C
  $The return type should be int$
- D
  $Nothing is wrong$
Why
$n / 2 performs integer division because both operands are int, so half(3) returns 1.0. Use (double) n / 2 or n / 2.0 to retain the fractional part.$
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Sample 4difficulty 2/5
$<code> -3 + 2 * -2 </code> evaluates to$
- A
  $-1$
- B
  $1$
- C
  $-7$
  check_circle
- D
  $-10$
Why
$2 * -2 = -4; -3 + (-4) = -7.$
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Sample 5difficulty 2/5
```
int result = (2 + 3) * 4;
System.out.println(result);
```
$What is printed?$
- A
  $20$
  check_circle
- B
  $14$
- C
  $24$
- D
  $9$
Why
$Parentheses force 2 + 3 = 5 to be evaluated first, then 5 * 4 = 20.$
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