JavaScript
Master core JS concepts, ES6+, closures, and asynchronous programming.
120+ QuestionsStart →
Master Technical Interviews
Scale your career with curated interview questions, interactive MCQs, and deep-dive explanations for top-tier tech roles.
1500+
Questions
4
Difficulty Levels
100%
Free
MNC
Ready
Choose Your Interview Technology
Select a track to start your journey.
React
In-depth hooks, state management, performance optimization, and patterns.
120+ QuestionsStart →
TypeScript
Advanced types, generics, configuration, and interface design.
120+ QuestionsStart →
Node.js
Event loop, streams, buffering, authentication, and API architecture.
120+ QuestionsStart →
SQL
Complex joins, indexing, transactions, and database optimization.
120+ QuestionsStart →
Next.js
App router, server components, data fetching, and SSR strategies.
120+ QuestionsStart →
More technologies like Angular, Vue, Python, Java, C++, Docker, AWS, MongoDB, and System Design are being added regularly.
Technical Interview Preparation Guide
Everything you need to master your next software engineering interview.
The Process
- • Online Assessment: Coding filters
- • MCQ Round: Core fundamentals
- • Coding Round: Live problem solving
- • Technical Discussion: Architecture deep-dives
- • System Design: Scalability focus
- • HR Round: Behavioral & culture fit
Roadmap & Prep
Start with HTML, CSS, and JS foundations. Move to React/Next.js, then master TypeScript and SQL. Advanced roles require deep knowledge in Performance, Security, and Scalability.
Focus: Design Patterns
Pro Tips
- • Communicate: Narrate your logic.
- • Resume: Keep it clean and relevant.
- • Setup: Test mic/video for remote.
- • Clarify: Ask questions first.
- • Practice: Standard algorithms daily.
Top Companies
Prepare for Interviews at Leading Tech Companies
Our interview questions are inspired by real interview experiences shared by candidates from leading product-based companies and multinational organizations.
Practice company-inspired interview questions covering coding, JavaScript, React, SQL, system design, debugging, and frontend/backend concepts.
Company-Level Practice
Microsoft
Practice company-inspired interview questions covering coding, JavaScript, React, SQL, system design, debugging, and frontend/backend concepts.
Company-Level Practice
Amazon
Practice company-inspired interview questions covering coding, JavaScript, React, SQL, system design, debugging, and frontend/backend concepts.
Company-Level Practice
Meta
Practice company-inspired interview questions covering coding, JavaScript, React, SQL, system design, debugging, and frontend/backend concepts.
Company-Level Practice
Adobe
Practice company-inspired interview questions covering coding, JavaScript, React, SQL, system design, debugging, and frontend/backend concepts.
Company-Level Practice
Oracle
Practice company-inspired interview questions covering coding, JavaScript, React, SQL, system design, debugging, and frontend/backend concepts.
Company-Level Practice
Netflix
Practice company-inspired interview questions covering coding, JavaScript, React, SQL, system design, debugging, and frontend/backend concepts.
Company-Level Practice
Uber
Practice company-inspired interview questions covering coding, JavaScript, React, SQL, system design, debugging, and frontend/backend concepts.
Company-Level Practice
Flipkart
Practice company-inspired interview questions covering coding, JavaScript, React, SQL, system design, debugging, and frontend/backend concepts.
Company-Level Practice
Atlassian
Practice company-inspired interview questions covering coding, JavaScript, React, SQL, system design, debugging, and frontend/backend concepts.
Company-Level Practice
TCS
Practice company-inspired interview questions covering coding, JavaScript, React, SQL, system design, debugging, and frontend/backend concepts.
Company-Level Practice
Infosys
Practice company-inspired interview questions covering coding, JavaScript, React, SQL, system design, debugging, and frontend/backend concepts.
Company-Level Practice
More Companies Coming Soon
We are continuously adding interview questions inspired by hiring processes from startups, unicorns, FAANG companies, fintech, e-commerce, SaaS, and enterprise organizations.
Why DevCalc?
Why Choose DevCalc for Interview Preparation?
Prepare smarter with structured interview learning, interactive MCQ tests, detailed explanations, real-world coding questions, and a complete beginner-to-MNC roadmap for frontend and backend developers.
Interactive MCQ Tests
Practice technology-specific interview questions with interactive multiple-choice quizzes and instant scoring.
Code Examples
Understand every concept through practical code snippets and real-world interview examples.
Detailed Explanations
Every question includes explanations that help you understand why an answer is correct.
Progress Tracking
Track completed stages, quiz scores, best attempts, and continue from where you stopped.
Stage Unlock System
Complete Beginner before Intermediate, Intermediate before Advanced, and finally unlock the MNC stage.
Real Interview Scenarios
Questions are inspired by interviews from leading technology companies including Google, Microsoft, Amazon, Adobe, Oracle, and more.
Randomized Practice
Questions are shuffled every time you retry, providing a fresh interview experience on every attempt.
Practice Anywhere
Prepare for interviews seamlessly on desktop, tablet, and mobile devices with a fully responsive interface.
Start Your Interview Preparation Today
Practice JavaScript, React, Next.js, SQL, Node.js, TypeScript, HTML, CSS and many more technologies through structured interview stages and improve your confidence before your next technical interview.
Frequently Asked Questions
What are technical interview questions?
Technical interview questions assess your problem-solving skills, language proficiency, and architectural knowledge across various programming stacks.
How do beginners prepare?
Beginners should focus on core fundamentals (HTML/CSS/JS) before moving to framework-specific questions and basic data structures.
Are these questions suitable for MNC interviews?
Yes, our MNC-tier questions focus on system design, optimization, and complex architectural trade-offs.
Are explanations included?
Every question on DevCalc comes with a detailed explanation to help you understand the 'why' behind the answer.
Do I need an account?
You can browse most resources freely, but creating an account helps track your progress across different stages.
Can I practice on mobile?
Our platform is fully responsive and optimized for a seamless mobile experience.
How many questions should I solve daily?
Consistency is key. Aim for 5-10 high-quality questions per day to build long-term retention.
Which technologies are covered?
We cover a wide range including JavaScript, React, Next.js, TypeScript, Node.js, SQL, and more.
Are coding questions included?
Yes, our platform includes a blend of theory, MCQs, and practical coding challenges.
Difference between MCQ and coding interview?
MCQs test theoretical breadth and syntax knowledge, while coding interviews test logic, algorithmic efficiency, and implementation skills.
Is DevCalc free?
Yes, our core interview preparation resources are free to help every developer succeed.
Will new questions be added?
We regularly update our database with the latest industry-standard questions.
Can experienced developers use this?
Absolutely. Our advanced and system design modules are curated for senior-level engineering roles.
How are stages unlocked?
Stages are unlocked as you master fundamental concepts and demonstrate proficiency in previous levels.
How should I revise before interview?
Focus on our 'Final Preparation Checklist' and revisit your bookmarked questions and weak areas.