Given a Stack with elements 5, 10, 15 (top is 15), and a Queue with elements 20, 25, 30 (front is 20), what will be the content of the Queue after moving all Stack elements into it by popping from Stack and enqueuing into Queue?

hard🚀 Application Q9 of 15

C Sharp (C#) - Collections

A5, 10, 15, 20, 25, 30

B15, 10, 5, 20, 25, 30

C20, 25, 30, 5, 10, 15

D20, 25, 30, 15, 10, 5

Step-by-Step Solution

Solution:

Step 1: Understand Stack pop order
Popping from Stack removes 15, then 10, then 5.
Step 2: Enqueue popped items to Queue
Queue adds these items at the end, so after 20, 25, 30, the items 15, 10, 5 are added in that order.
Final Answer:
20, 25, 30, 15, 10, 5 -> Option D
Quick Check:
Stack pop order appended to Queue end [OK]

Quick Trick: Popped Stack items enqueue at Queue's end in pop order [OK]

Common Mistakes:

MISTAKES

Reversing order incorrectly
Adding Stack items to front of Queue

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Given a Stack with elements 5, 10, 15 (top is 15), and a Queue with elements 20, 25, 30 (front is 20), what will be the content of the Queue after moving all Stack elements into it by popping from Stack and enqueuing into Queue?

Step 1: Understand Stack pop order

Step 2: Enqueue popped items to Queue

Final Answer:

Quick Check:

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