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The five items: A, B, C, D, and E are pushed in a stack, one after other starting from A. The stack is popped four items and each element is inserted in a queue. The two elements are deleted from the queue and pushed back on the stack. Now one item is popped from the stack. The popped item is
  • a)
    A
  • b)
    B
  • c)
    C
  • d)
    D
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
The five items: A, B, C, D, and E are pushed in a stack, one after oth...
When five items: A, B, C, D, and E are pushed in a stack: Order of stack becomes: A, B, C, D, and E (A at the bottom and E at the top.) stack is popped four items and each element is inserted in a queue: Order of queue: B, C, D, E (B at rear and E at the front) Order of stack after pop operations = A Two elements deleted from the queue and pushed back on the stack: New order of stack = A, E, D(A at the bottom, D at the top) As D is on the top so when pop operation occurs D will be popped out.
So, correct option is (D).
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Community Answer
The five items: A, B, C, D, and E are pushed in a stack, one after oth...
Given Information:
- Five items A, B, C, D, and E are pushed in a stack in the order A -> B -> C -> D -> E.
- The stack is then popped four times, and each popped item is inserted into a queue.
- Two elements are deleted from the queue.
- The two deleted elements from the queue are pushed back onto the stack.
- Finally, one item is popped from the stack.

Step-by-Step Explanation:

Step 1: Initial Stack and Queue State
- Stack: A -> B -> C -> D -> E
- Queue: Empty

Step 2: Popping Four Items from the Stack and Inserting into Queue
- Stack: E (top)
- Queue: A -> B -> C -> D

Step 3: Deleting Two Elements from the Queue
- Queue: C -> D

Step 4: Pushing the Deleted Elements back onto the Stack
- Stack: E -> D -> C (top)

Step 5: Popping One Item from the Stack
- Stack: C (top)

Conclusion:
The popped item from the stack is 'C'. Therefore, the correct answer is option 'C'.
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The five items: A, B, C, D, and E are pushed in a stack, one after other starting from A. The stack is popped four items and each element is inserted in a queue. The two elements are deleted from the queue and pushed back on the stack. Now one item is popped from the stack. The popped item isa)Ab)Bc)Cd)DCorrect answer is option 'D'. Can you explain this answer?
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The five items: A, B, C, D, and E are pushed in a stack, one after other starting from A. The stack is popped four items and each element is inserted in a queue. The two elements are deleted from the queue and pushed back on the stack. Now one item is popped from the stack. The popped item isa)Ab)Bc)Cd)DCorrect answer is option 'D'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about The five items: A, B, C, D, and E are pushed in a stack, one after other starting from A. The stack is popped four items and each element is inserted in a queue. The two elements are deleted from the queue and pushed back on the stack. Now one item is popped from the stack. The popped item isa)Ab)Bc)Cd)DCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The five items: A, B, C, D, and E are pushed in a stack, one after other starting from A. The stack is popped four items and each element is inserted in a queue. The two elements are deleted from the queue and pushed back on the stack. Now one item is popped from the stack. The popped item isa)Ab)Bc)Cd)DCorrect answer is option 'D'. Can you explain this answer?.
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