Most Asked MAANG Interview Questions

Ace Your Interview

Are you preparing for a job interview at a MAANG company (Meta, Apple, Amazon, Netflix, Google)? The rigorous screening process could make it challenging.

Here is the list of most frequently asked questions -

1. Algorithms and Data Structures Questions

Common Topics:

• Arrays
• Strings
• Linked Lists
• Trees and Graphs
• Dynamic Programming (DP)
• Sorting and Searching
• Backtracking

Sample Questions:

1. Two Sum: Given an array of integers, return the indices of two numbers such that they add up to a specific target.
   (Hint: Use a hashmap for O(n) complexity.)
2. Longest Substring Without Repeating Characters: Find the length of the longest substring without repeating characters in a string.
   Input: “ABCDAB”
   Output: 4
3. Merge K-Sorted Lists: Merge k-sorted linked lists into one sorted list.
   (Hint: Use a min-heap for efficiency.)
4. Binary Tree Level Order Traversal: Traverse a binary tree level by level.
5. Knapsack Problem: Solve the 0/1 Knapsack problem using dynamic programming.

2. System Design Questions

Common Topics

• High-level system architecture
• Database design
• Load balancing
• Caching strategies
• Scalability

Sample Questions

1. Design a URL Shortener: How would you design a system like Bitly?
   (Hint: Discuss hashing techniques and database schema.)
2. Design an E-commerce Website: Discuss the architecture, database, and scaling techniques.
3. Design a Chat Application: Build a system like WhatsApp or Slack, focusing on real-time messaging and scalability.
4. Design a Rate Limiter: Implement a system to limit the number of API requests from a single user.
5. Design a News Feed System: Build a scalable news feed system like Facebook or Twitter.

3. Behavioral Questions

Common Topics

• Problem-solving mindset
• Collaboration and teamwork
• Conflict resolution
• Leadership skills
• Handling failures

Sample Questions

1. Tell me about a time you had to resolve a conflict within your team.
   (Hint: Use the STAR method (Situation, Task, Action, Result).)
2. Describe a challenging project you worked on and how you handled it.
3. Have you ever had to deal with an uncooperative teammate? How did you handle it?
4. What’s your biggest professional failure, and what did you learn from it?
5. How do you prioritize tasks when faced with multiple deadlines?

4. SQL and Database Questions

Common Topics

• Writing complex SQL queries
• Indexing and optimization
• ACID properties
• Normalization and denormalization

Sample Questions

1. Find the Second Highest Salary: Write a query to find the second highest salary in a table.
2. Join Operations: Explain the difference between INNER JOIN, LEFT JOIN, and RIGHT JOIN.
3. Count Duplicate Records: Write a query to count duplicates in a table.
4. Database Indexing: Explain indexing and how it improves query performance.
5. Design a Schema: Create a schema for a ride-sharing app like Uber.

5. Coding Concepts

Common Topics

• Bit Manipulation
• Recursion
• Object-Oriented Programming (OOP)
• Memory Management
• Threading and Concurrency

Sample Questions

1. Reverse a Linked List: Implement an iterative and recursive solution.
2. Find Missing Number: Given an array of integers where one number is missing, find the missing number.
3. Detect a Cycle in a Graph: Use Depth-First Search (DFS) to detect cycles.
4. Implement Singleton Pattern: Write code to demonstrate the singleton design pattern.
5. Thread Synchronization: Write code to solve the producer-consumer problem.

6. Frontend Development Questions

Common Topics

• HTML, CSS, JavaScript
• React/Angular/Vue
• Browser Rendering
• Performance Optimization

Sample Questions

1. Debounce vs Throttle: Explain the difference and write an implementation.
2. Virtual DOM: What is the Virtual DOM, and how does React use it?
3. Cross-Origin Resource Sharing (CORS): What is CORS, and how is it implemented?
4. CSS Specificity: Explain how CSS specificity works with an example.
5. Web Performance: How would you optimize a web page for performance?

7. Miscellaneous Questions

1. What is the difference between REST and GraphQL?
2. How does garbage collection work in JavaScript or Java?
3. Explain the CAP Theorem in distributed systems.
4. How does DNS work?
5. What is the difference between TCP and UDP?

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