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46 Stacks interview questions

Only coding challenges

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Stack Fundamentals

1.
What is a Stack?
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2.
Why Stack is considered a Recursive data structure?
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3.
What are the primary operations performed on a Stack and their time complexities?
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Stack Usage and Applications

4.
When should I use Stack or Queue data structures instead of Arrays/Lists?
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5.
What are Infix, Prefix, and Postfix notations?
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6.
Explain how Stacks are used in Function Call management in programming languages.
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7.
Describe an application where Stacks are naturally suited over other data structures.
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Stack Implementation Details

8.
Compare Array-based vs Linked List stack implementations.
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9.
Implement a Dynamic Stack that automatically resizes itself.
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10.
What are the performance implications of a Fixed-size Array Stack Implementation?
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Stack Design Challenges

11.
Design a Stack that supports Retrieving the min element in O(1).
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12.
How can you design a Stack to be thread-safe?
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13.
Implement a Stack with a Find-Middle operation in O(1) time.
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Stack and Other Data Structures

14.
Implement a Linked List using Stack.
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15.
Implement Doubly Linked List using Stacks with min complexity.
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16.
Implement a Queue using Two Stacks.
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17.
Implement a Queue using only One Stack.
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18.
Implement Stack using Two Queues with efficient push.
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19.
Implement Three Stacks with One Array.
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Stack Manipulation and Variation

20.
Reverse a String using Stack.
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21.
Reverse a Stack without using any additional data structure.
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22.
Sort a Stack using Recursion.
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23.
Sort a Stack using another Stack.
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24.
Implement a Shuffling Algorithm using a Stack.
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Stack in Parsing and Expression Evaluation

25.
Check if parentheses are Balanced using Stack.
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26.
Find Duplicate Parenthesis in an expression.
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27.
How can a Stack be used to evaluate Postfix expressions?
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28.
Convert an Infix expression to Postfix using a Stack.
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29.
Build a Binary Expression Tree for the given expression.
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Handling Large Datasets with Stack

30.
Given an Extremely Large File that doesn’t fit into memory, check if the parentheses are Balanced.
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31.
Check for Braces Balance in a really large (1T) file in Parallel.
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32.
Design a script to process large-scale, real-time Undo Operations using Stacks.
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33.
How would a Stack handle Memory Allocation in large data scenarios?
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Advanced Stack Problems

34.
Solve the Stock Span Problem using a Stack.
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35.
Design an algorithm to Calculate Rainwater Trapped between towers using a Stack.
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Stack Performance Optimization

36.
Explain how to minimize Stack Overflow in programming with limited memory.
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37.
What techniques can be used to improve the Locality of reference for a Stack?
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Stacks in Multithreading and Concurrency

38.
Describe a Lock-free Stack and where it may be used.
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39.
Illustrate how a Stack can be used in implementing Producer-Consumer scenarios.
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Stack Invariants and Monitoring

40.
Propose a method to maintain a History of Operations on a Stack.
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41.
How might you design a monitoring system for Capacity Thresholds of a Stack?
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Stack Error Handling and Exceptions

42.
Explain how a Stack Trace is used in debugging and exception handling.
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43.
What methods exist to handle Stack Overflow Exceptions in memory-constrained environments?
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Stack Algorithm Challenges

44.
Create an algorithm to Normalize Pathnames using a Stack.
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45.
Implement a function that finds the Next Greater Element using a Stack.
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46.
Develop an algorithm to check for Cycles in a Directed Graph using Stack-based DFS.
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