Exam-style question
Try this first
What does the pop operation do to a stack?.
- A.Adds a value to the bottom without changing the top
- B.Removes and returns the top value
- C.Returns the top value but leaves it in place
- D.Checks whether the stack has reached maximum size
Model answer
What a good answer should say
- Removes and returns the top value
Explanation
Why this works
Pop removes the top element from the stack and returns its value.
Common mistake
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