Stack Interview Questions: From Basics to Advanced Problem-Solving

#datastructures #algorithms #webdev #interview

Comprehensive Stack Interview Questions: From Basics to Advanced Problem-Solving.

1. Stack Basics

Implementing a Stack Using Arrays
Implementing a Stack Using Linked Lists
Implementing a Stack Using Two Queues
Implementing a Stack Using a Single Queue
Stack Operations (Push, Pop, Peek)
Implementing a Min Stack (Get Minimum in O(1) Time)
Implementing a Max Stack (Get Maximum in O(1) Time)
Implementing a Stack Using Two Stacks
Implementing a Stack Using Recursion
Stack Implementation Using Dynamic Arrays

2. Infix, Prefix, and Postfix Expressions

Converting Infix to Postfix
Converting Infix to Prefix
Converting Postfix to Infix
Evaluating a Postfix Expression
Evaluating a Prefix Expression
Validating an Infix Expression
Parenthesis Matching (Balanced Parentheses)
Implementing Shunting Yard Algorithm for Expression Parsing
Converting Infix to Postfix with Associativity and Precedence Handling

3. Advanced Stack Operations

Design a Stack that Supports GetMin, GetMax, and GetMedian
Implementing a Two-Stack Queue
Design a Stack with Increment Operation
Implementing a Stack Using Deque
Implementing Special Stack Operations (Double Push, Double Pop)
Building a Stack from Scratch Without Using Built-In Data Structures
Implement a Stack with Dynamic Resizing
Implement a Stack That Supports Middle Element Access
Implement Stack Sorting Using Recursion
Implement a Custom Stack with Customized Push/Pop Rules

4. Stack-Based Problem-Solving

Next Greater Element to the Right
Next Greater Element to the Left
Next Smaller Element to the Right
Next Smaller Element to the Left
Stock Span Problem
Trapping Rain water Problem
Simplify Directory Path (Unix Style Path Simplification)
Evaluate Reverse Polish Notation
Validating Stack Sequences

5. Stack and Recursion

Reverse a Stack Using Recursion
Sort a Stack Using Recursion
Insert an Element at the Bottom of a Stack Using Recursion
Finding Maximum Depth of Nested Parentheses
Decode a String with Nested Patterns (e.g., "3[a2[c]]" → "accaccacc")
Checking Redundant Parentheses in an Expression
Flattening Nested Lists (Nested List Weight Sum)
Recursive Depth Calculation Using Stack
Implement an Algorithm for the Nearest Smaller Values (Monotonic Stack )

6. Real-World Stack Applications

Implement Browser Back/Forward Functionality Using Stacks
Design Undo/Redo Operations Using Stacks
Evaluate Mathematical Expressions Using Stacks
Simulating Call Stack in Function Execution
Implement a Text Editor with Parentheses Matching Feature
Balancing Chemical Equations Using Stacks

7. Stack Variants and Custom Implementations

Design a Thread-Safe Stack
Implement a Circular Stack
Implement a Persistent Stack (Immutable Data Structures)
Create a Lock-Free Stack Using Atomic Operations

🔗 Connect with me on LinkedIn:

Let’s dive deeper into the world of software engineering together! I regularly share insights on JavaScript, Node.js, React, Next.js, data structures, algorithms, web development, and much more. Whether you're looking to enhance your skills or collaborate on exciting topics, I’d love to connect and grow with you.

Follow me: Nozibul Islam