[Problems] Summary of Problems on Stacks and Queues for Interviews and Self Assessments

Below are some of the problems based on stacks and queues. You will also find applications of stacks and queues in other sections such as Trees and Graphs.

 

Important Points to Remember 

  1. Stack uses the LIFO (Last In First Out) ordering.

  2. Queue uses the FIFO (First In First Out) ordering.

 

Important Points to Revise

  1. Arrays, Linked Lists

 

Problems

  1. Implement a stack

  2. Implement a queue

  3. Add a getMinimum() function to a Stack class of integers.

    • Assumptions and requirements:

      • Stack has push() and pop() method

      • push(), pop() and getMinimum() should operate in O(1)

 

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