IIInsiderInterview

Technology and Engineering · #9 in series

Full Stack Engineer interview prep

Top 100 interview questions for Full Stack Engineer — modeled on real FAANG loops.

100

Questions

14

Topics

20

Free

Practise this role →

General Programming Concepts Data Structures and Algorithms Front-End Development Back-End Development Databases DevOps and Deployment Security Testing System Design Problem Solving and Coding Challenges Behavioral Questions Miscellaneous Advanced Topics Emerging Trends and Technologies

General Programming Concepts

7 questions

Explain the concept of object-oriented programming and its four main principles.

What is functional programming, and how does it differ from object-oriented programming?

Discuss the differences between synchronous and asynchronous programming.

What are design patterns, and why are they important?

Explain the concept of immutability in programming.

What is recursion, and how does it differ from iteration?

Discuss the trade-offs between using a compiled language versus an interpreted language.

Data Structures and Algorithms

8 questions

Explain the differences between arrays and linked lists.

How would you implement a stack using a queue?

Describe the quicksort algorithm and its time complexity.

What is a hash table, and how does it work?

Explain the difference between depth-first search and breadth-first search.

How would you detect a cycle in a linked list?

Discuss the trade-offs between using a binary search tree versus a hash table.

Explain the concept of dynamic programming with an example.

Front-End Development

8 questions

What are the main differences between React and Angular?

Explain the virtual DOM and its benefits.

How does CSS specificity work?

What is the box model in CSS?

How would you optimize a web page for performance?

Explain the concept of responsive design and how you would implement it.

What are CSS preprocessors, and why would you use them?

Discuss the differences between server-side rendering and client-side rendering.

Back-End Development

8 questions

Explain the differences between REST and GraphQL.

What is middleware in the context of web development?

How would you handle authentication and authorization in a web application?

What is a microservices architecture?

Explain the concept of load balancing.

How do you ensure data consistency in a distributed system?

Discuss the role of a reverse proxy in web development.

What are the differences between SQL and NoSQL databases?

Databases

7 questions

Explain the concept of normalization in relational databases.

What are indexes, and how do they improve query performance?

How would you design a database schema for an e-commerce platform?

Discuss the differences between ACID and BASE transactions.

What is a database transaction, and why is it important?

How do you handle database migrations in a production environment?

Explain the concept of sharding in databases.

DevOps and Deployment

7 questions

What is continuous integration, and why is it important?

How do containers work, and what are their benefits?

Explain the differences between Docker and Kubernetes.

What is Infrastructure as Code (IaC), and why is it useful?

How do you monitor the performance of a web application?

What are the benefits of using cloud computing platforms like AWS or Azure?

Discuss the differences between a blue-green deployment and a canary release.

Security

7 questions

What are the OWASP Top Ten security risks?

How do you prevent SQL injection attacks?

Explain the concept of Cross-Site Scripting (XSS) and how to prevent it.

What is Cross-Site Request Forgery (CSRF), and how can it be mitigated?

How do you secure sensitive data in a web application?

Discuss the importance of HTTPS and how it works.

What is two-factor authentication, and how does it improve security?

Testing

6 questions

What is unit testing, and why is it important?

How do you perform integration testing in a web application?

Explain the differences between manual and automated testing.

What is a test-driven development (TDD) approach?

How do you use mocks and stubs in testing?

Discuss the differences between black-box and white-box testing.

System Design

7 questions

How would you design a URL shortening service like Bitly?

What are the key considerations in designing a scalable web application?

How do you design a caching system for a web application?

Explain the CAP theorem and its implications for distributed systems.

How would you design a notification system for a social media platform?

What are the challenges in designing a real-time chat application?

How do you ensure high availability in a distributed system?

Problem Solving and Coding Challenges

8 questions

Write a function to reverse a string in place.

How would you find the longest palindrome in a given string?

Write a function to merge two sorted arrays.

How do you determine if a binary tree is balanced?

Write a function to perform a binary search on a sorted array.

How would you implement a least recently used (LRU) cache?

Write a function to find the nth Fibonacci number using dynamic programming.

How do you solve the "Two Sum" problem in an optimal way?

Behavioral Questions

7 questions

Describe a challenging project you worked on and how you overcame the obstacles.

How do you prioritize tasks when working on multiple projects?

Discuss a time when you had to learn a new technology quickly.

How do you handle disagreements with team members?

Describe a situation where you had to work under pressure and how you managed it.

How do you stay updated with the latest trends in technology?

Discuss a time when you took the lead on a project.

Miscellaneous

7 questions

What are the key differences between HTTP/1.1 and HTTP/2?

Explain the role of a Content Delivery Network (CDN).

What is WebAssembly, and why is it significant?

Discuss the differences between MVC and MVVM architectures.

How do you handle real-time data updates in a web application?

What are the benefits and drawbacks of using serverless architectures?

Explain the concept of event-driven programming.

Advanced Topics

7 questions

What is a monorepo, and what are its advantages and disadvantages?

Discuss the differences between monolithic and microservices architectures.

How do you handle distributed transactions across microservices?

Explain the concept of eventual consistency in distributed systems.

How would you implement a rate limiter for an API?

Discuss the role of message brokers in distributed systems.

How do you design a failover system for cloud services?

Emerging Trends and Technologies

6 questions

What is the role of AI and machine learning in modern web applications?

How do you integrate blockchain technology into a web application?

What are the benefits of using GraphQL over REST for APIs?

Discuss the impact of edge computing on web development.

How do you implement Progressive Web Apps (PWAs)?

What are the key considerations for developing applications for the Internet of Things (IoT)?

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