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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

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Solution

The correct answer is 8 5 2 1.

Here's the step by step process:

  1. push(5): Stack is {5}
  2. push(8): Stack is {5,8}
  3. pop: Removes 8. Stack is {5}
  4. push(2): Stack is {5,2}
  5. push(5): Stack is {5,2,5}
  6. pop: Removes 5. Stack is {5,2}
  7. pop: Removes 2. Stack is {5}
  8. pop: Removes 5. Stack is {}
  9. push(1): Stack is {1}
  10. pop: Removes 1. Stack is {}

So, the sequence of removed elements is 8 5 2 1.

This problem has been solved

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