Difficulty: Easy
Correct Answer: Hi
Explanation:
Introduction / Context:
This question checks knowledge of switch control flow. Statements inside a switch that precede any case label are not “default prelude” statements; control transfers directly to the matching case label, skipping earlier statements.
Given Data / Assumptions:
i = 1.printf("Hello\n"); placed before the case labels.switch semantics apply: jump to the matching label and execute from there.
Concept / Approach:
When switch (i) is executed, the implementation looks for a matching case label (here case 1) and transfers control directly to that label. No statement before that label will run. Therefore, only the statements under case 1 (up to the break) execute.
Step-by-Step Solution:
switch (1) → jump to case 1.Execute: printf("Hi\n");.Encounter break → exit the switch.
Verification / Alternative check:
Move printf("Hello\n"); after case 1: and before the printf("Hi\n");. Then both lines will print; this confirms the role of label placement.
Why Other Options Are Wrong:
case 2, which does not match.“No output” contradicts the executed printf in case 1.
Common Pitfalls:
Assuming topmost statements run before label dispatch; forgetting that code before the first case is dead unless jumped to.
Final Answer:
Hi.
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