Master Your Technology Interview: 1,000+ Real-World Questions & Coding Guides
Expert-curated interview questions with STAR-method answers, hands-on coding guides, and learning paths for MERN, MEAN, .NET, Azure, AI/ML, and more.
Interview Preparation by Technology
Deep‑dive into curated STAR‑method Q&A sets. Each pillar covers real questions asked at top tech companies with production‑grade answers.
React
Hooks architecture, performance optimization, Server Components, state management, testing patterns, and design system architecture for 4+ years experience.
Start Preparing →JavaScript
Closures, event loop, prototypal inheritance, async/await, TypeScript integration, memory management, design patterns, and security for senior roles.
Start Preparing →Python
Generators, decorators, GIL, concurrency, Django vs FastAPI, pytest, data processing with pandas/numpy, and production deployment patterns.
Start Preparing →System Design
URL shortener, rate limiter, chat system, notification service, distributed cache, payment processing — step-by-step with back-of-envelope calculations.
Start Preparing →SQL
Query optimization, indexing strategies, window functions, CTEs, transactions, database scaling with sharding, and PostgreSQL/MySQL performance tuning.
Start Preparing →MERN Stack
MongoDB, Express, React & Node.js — full-stack interview questions covering hooks, aggregation pipelines, middleware patterns, and production scaling.
Start Preparing →MEAN Stack
MongoDB, Express, Angular & Node.js — change detection, RxJS, dependency injection, schema design, and event-loop internals.
Start Preparing →SQL / .NET Full Stack
SQL Server, Azure SQL, .NET 10 & React — query optimization, Entity Framework, REST API security, and cloud deployment.
Start Preparing →AI / ML Engineering
Azure AI, RAG, LangChain, Vertex AI & prompt engineering — production ML pipelines, grounding techniques, and vector-search architecture.
Start Preparing →Generative AI & LLMs
RAG pipelines, prompt engineering, fine-tuning, safety guardrails, and system design for LLM-powered apps.
Start Preparing →Top-Searched Technical Hard Skills
Master the interview topics that top tech companies ask most. Each silo links to in-depth guides with real questions and STAR-method answers.
System Design Interview Questions
Frontend & React Interview Questions
Backend & Database Interview Questions
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Latest Questions & Trending Guides
Freshly added content — filtered by the companies that ask these topics most.
SQL Interview Questions & Answers 2026 — Real-World Guide for 4+ Years
Top 20 SQL interview questions with real-world answers for 4+ years experience. Query optimization, indexing, window functions, CTEs, transactions, sharding, and performance tuning.
System Design Interview Questions & Answers 2026 — Step-by-Step for 4+ Years
Top 20 system design interview questions with step-by-step solutions for 4+ years experience. URL shortener, rate limiter, chat system, notification service, distributed cache.
Python Interview Questions & Answers 2026 — STAR Format for 4+ Years
Top 20 Python interview questions with STAR answers for 4+ years experience. Generators, decorators, GIL, async/await, Django/FastAPI, testing, and production patterns.
JavaScript Interview Questions & Answers 2026 — STAR Format for 4+ Years
Top 20 JavaScript interview questions with STAR answers for 4+ years experience. Closures, event loop, prototypes, async/await, TypeScript, memory management, security.
React Interview Questions & Answers 2026 — STAR Format for 4+ Years
Top 20 React interview questions with STAR answers for 4+ years experience. Hooks architecture, performance optimization, Server Components, state management, testing.
MERN Stack Interview Questions & Answers (MongoDB, Express, React, Node.js) — 4+ Years
Top 20 MERN stack interview questions with STAR answers for 4+ years experience. React hooks & performance, MongoDB aggregation, Express middleware, Node.js scaling.
MEAN Stack Interview Questions & Answers (MongoDB, Express, Angular, Node.js) — 3+ Years
Top 20 MEAN stack interview questions with STAR answers for 3+ years experience. MongoDB schema design, Express middleware, Angular change detection, Node.js event loop.
SQL Full Stack Developer Interview Questions & Answers (SQL Server, Azure SQL, .NET 10, React)
Top 20 senior SQL full stack interview questions with STAR answers. SQL Server, Azure SQL Database, .NET 10 REST API, React, security, performance tuning — 8+ years.
Learning Paths — Beginner to Pro
Follow a structured roadmap to master each stack. Every step links to real guides and interview prep on this site.
Frontend Developer
Beginner → Pro- 1HTML / CSS / JS
- 2React or Angular
- 3State Management
- 4Testing & CI/CD
Backend Developer
Beginner → Pro- 1Node.js / .NET Core
- 2REST & GraphQL APIs
- 3Databases & ORM
- 4Auth, Caching & Scaling
Full Stack (MERN / MEAN)
Intermediate → Senior- 1Pick Your Stack
- 2Build a Full CRUD App
- 3Deploy to Cloud
- 4System Design & Performance
AI / ML Engineer
Intermediate → Pro- 1Python & ML Basics
- 2Model Training & Eval
- 3RAG & LLM Apps
- 4Azure AI & Production
Cloud & DevOps
Beginner → Senior- 1Azure Fundamentals
- 2IaC & Terraform
- 3Kubernetes & Docker
- 4Monitoring & Cost Mgmt
Curated by Surya Singh
Senior Software Engineer & Technical Interviewer
Every question on this site is written from hands-on production experience across MERN, MEAN, .NET, Azure, and AI/ML stacks. Answers follow the STAR method with real metrics so you can adapt them to your own interviews.
Connect on LinkedInFrequently Asked Questions
Quick answers to the career and technology questions developers ask most.
Start by mastering data structures, algorithms, and system design fundamentals. Then practice with real STAR‑method questions for your target stack (MERN, MEAN, .NET, etc.). Use our curated guides to study 20+ questions per technology, review production‑level code examples, and rehearse behavioral answers with measurable outcomes.
JavaScript/TypeScript (React, Angular, Node.js), Python (AI/ML, data engineering), C#/.NET, and Go remain the most sought‑after. Cloud skills in Azure, AWS, and Kubernetes are equally critical. Generative AI and LLM tooling (LangChain, RAG) are the fastest‑growing categories in job postings.
With focused daily study, most people reach a job‑ready level in 6–12 months. A typical path covers HTML/CSS/JS (4–6 weeks), a front‑end framework like React (4–6 weeks), back‑end with Node.js or .NET (6–8 weeks), databases (4 weeks), and deployment & DevOps basics (2–4 weeks). Our Learning Paths break this down step by step.
STAR stands for Situation, Task, Action, Result. It structures your answer so interviewers can quickly evaluate scope, ownership, technical decisions, and measurable impact. Every behavioral and scenario‑based question on this site uses the STAR format with concrete metrics, making it easy to adapt answers to your own experience.
Yes — even if you don't become an ML engineer. Understanding prompt engineering, RAG architectures, and how to integrate LLM APIs into existing apps is now a baseline expectation for senior roles. Our AI/ML interview guides and GenAI question banks cover exactly what hiring managers test for, without requiring a PhD.
Browse All Articles & Guides
Filter by topic, search by keyword, or scroll to discover everything we've published.
SQL Interview Questions & Answers 2026 — Real-World Guide for 4+ Years
Top 20 SQL interview questions with real-world answers for 4+ years experience. Query optimization, indexing, window functions, CTEs, transactions, sharding, and performance tuning.
SQLDatabasePostgreSQLMySQLSystem Design Interview Questions & Answers 2026 — Step-by-Step for 4+ Years
Top 20 system design interview questions with step-by-step solutions for 4+ years experience. URL shortener, rate limiter, chat system, notification service, distributed cache.
System DesignArchitectureScalabilityInterviewPython Interview Questions & Answers 2026 — STAR Format for 4+ Years
Top 20 Python interview questions with STAR answers for 4+ years experience. Generators, decorators, GIL, async/await, Django/FastAPI, testing, and production patterns.
PythonDjangoFastAPIInterviewJavaScript Interview Questions & Answers 2026 — STAR Format for 4+ Years
Top 20 JavaScript interview questions with STAR answers for 4+ years experience. Closures, event loop, prototypes, async/await, TypeScript, memory management, security.
JavaScriptTypeScriptES6+InterviewReact Interview Questions & Answers 2026 — STAR Format for 4+ Years
Top 20 React interview questions with STAR answers for 4+ years experience. Hooks architecture, performance optimization, Server Components, state management, testing.
ReactJavaScriptTypeScriptInterviewMERN Stack Interview Questions & Answers (MongoDB, Express, React, Node.js) — 4+ Years
Top 20 MERN stack interview questions with STAR answers for 4+ years experience. React hooks & performance, MongoDB aggregation, Express middleware, Node.js scaling.
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MEAN Stack Interview Questions & Answers (MongoDB, Express, Angular, Node.js) — 3+ Years
Top 20 MEAN stack interview questions with STAR answers for 3+ years experience. MongoDB schema design, Express middleware, Angular change detection, Node.js event loop.
MongoDBExpressAngularNode.jsSQL Full Stack Developer Interview Questions & Answers (SQL Server, Azure SQL, .NET 10, React)
Top 20 senior SQL full stack interview questions with STAR answers. SQL Server, Azure SQL Database, .NET 10 REST API, React, security, performance tuning — 8+ years.
SQL Server.NETReactAzure SQLAI/ML Engineer Interview Questions and Answers (Azure AI, RAG, LangChain, Vertex AI)
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