Which evaluates to <codetrue</code?

Answer: 5 <= 5 <code<=</code is "less than or equal"; 5 ≤ 5 is true.

Answer: yes a <= b means "a less than or equal to b". 5 <= 5 is true, so "yes" prints.

Which assigns <codetrue</code to <codeb</code?

Answer: boolean b = 5 3; <code</code is comparison; 5 3 evaluates to <codetrue</code. <code=</code is assignment, not comparison.

AP Computer Science A · Topic 3.1

Boolean Expressions Practice

Q: Which evaluates to <codetrue</code?

Answer: 5 <= 5 <code<=</code is "less than or equal"; 5 ≤ 5 is true.

Q: What is printed?

Answer: yes a <= b means "a less than or equal to b". 5 <= 5 is true, so "yes" prints.

Q: Which assigns <codetrue</code to <codeb</code?

Answer: boolean b = 5 3; <code</code is comparison; 5 3 evaluates to <codetrue</code. <code=</code is assignment, not comparison.

Part of Boolean Expressions and if Statements.

Practice questions

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Sample questions

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Sample 1difficulty 1/5
$Which evaluates to <code> true </code> ?$
- A
  $5 != 5$
- B
  $5 <= 5$
  check_circle
- C
  $5 > 7$
- D
  $5 == 6$
Why
$<code> <= </code> is "less than or equal"; 5 \leq 5 is true.$
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Sample 2difficulty 1/5
```
int a = 5;
int b = 5;
if (a <= b) {
  System.out.println("yes");
} else {
  System.out.println("no");
}
```
$What is printed?$
- A
  $true$
- B
  $false$
- C
  $no$
- D
  $yes$
  check_circle
Why
$a <= b means "a less than or equal to b". 5 <= 5 is true, so "yes" prints.$
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Sample 3difficulty 2/5
$Which assigns <code> true </code> to <code> b </code> ?$
- A
  $boolean b = 5 > 3;$
  check_circle
- B
  $boolean b = 5 = 3;$
- C
  $boolean b = 5;$
- D
  $boolean b = (5 = 3);$
Why
$<code> > </code> is comparison; 5 > 3 evaluates to <code> true </code> . <code> = </code> is assignment, not comparison.$
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Sample 4difficulty 2/5
```
int x = 3;
int y = 3;
if (x == y) {
  System.out.println("equal");
} else {
  System.out.println("not equal");
}
```
$What is printed?$
- A
  $not equal$
- B
  $equal$
  check_circle
- C
  $compile error$
- D
  $true$
Why
$== is the equality comparison operator. x and y both equal 3, so the condition is true and "equal" is printed.$
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Sample 5difficulty 2/5
```
int a = 5;
int b = 5;
if (a != b) {
  System.out.println("X");
} else {
  System.out.println("Y");
}
```
$What is printed?$
- A
  $Y$
  check_circle
- B
  $X$
- C
  $true$
- D
  $false$
Why
$a and b are equal, so a != b is false, and the else branch prints "Y".$
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