Select the correct answerChoose correct output for the following sequence of operations.push(5) push(8) pop push(2) push(5) pop pop pop push(1) popOptions8 5 2 5 18 5 5 2 18 2 5 5 18 1 2 5 5
Question
Select the correct answerChoose correct output for the following sequence of operations.push(5) push(8) pop push(2) push(5) pop pop pop push(1) popOptions8 5 2 5 18 5 5 2 18 2 5 5 18 1 2 5 5
Solution
The correct answer is 8 5 2 1.
Here's the step by step process:
- push(5): Stack is {5}
- push(8): Stack is {5,8}
- pop: Removes 8. Stack is {5}
- push(2): Stack is {5,2}
- push(5): Stack is {5,2,5}
- pop: Removes 5. Stack is {5,2}
- pop: Removes 2. Stack is {5}
- pop: Removes 5. Stack is {}
- push(1): Stack is {1}
- pop: Removes 1. Stack is {}
So, the sequence of removed elements is 8 5 2 1.
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