In a weather alert system, what will be the output if the input is temperatureF = 32?
// Freeze warning when temperature is at or below freezing
int temperatureF = 32;
String message = "OK";
if (temperatureF <= 32) {
message = "FREEZE";
}
System.out.println(message);
- OK
- FREEZE (correct answer)
- 32
- ERROR
Explanation: This question tests understanding of if statements in AP Computer Science A, specifically less-than-or-equal-to comparisons. If statements allow a program to make decisions based on conditions, executing certain blocks of code when conditions are true. In this scenario, the code checks if temperatureF is at or below 32 degrees (freezing point) to issue a freeze warning. Choice B is correct because when temperatureF is 32, the condition (32 <= 32) evaluates to true, so message is changed from "OK" to "FREEZE", which is then printed. Choice A is incorrect because it assumes the condition is false at the boundary value, not understanding that <= includes equality. To help students: Use real-world examples like freezing point to make boundary conditions memorable. Practice with values at, above, and below thresholds to understand inclusive operators. Watch for: confusing <= with < or assuming the temperature value itself gets printed.