Coding Game
357 questions
Fill in the blank in real code, one question at a time. Three tracks: TypeScript + React, Python from zero to DSA, and Data + AI. Every answer explains the why.
For developers preparing for technical interviews
Be ready for your next interview, one question at a time.
Drill real code, review 1,100+ interview flashcards, and practise with an AI interviewer that gets harder as you get better. Then see exactly how ready you are.
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- 357 coding questions
- 1,103 flashcards
- 35 interview topics
Three ways to practise
Use one, or all three. Everything feeds the same dashboard.
Study Cards
1,103 cards · 11 decks
Interview questions with clear answers across React, JS/TS, backend, databases, system design, AI, DevOps, security, testing, DSA and 100 Python coding problems.
AI Interview Prep
35 topics · AI interviewer
An AI interviewer asks one question at a time, from basics to expert. Each answer gets a score out of 10, feedback and a model answer, and the next question adapts.
AI Interview Prep covers DSA · System Design · Machine Learning · GenAI & LLMs · CS Fundamentals · Python · JavaScript · TypeScript · React · Node.js · Java · Go · Rust · C++ · SQL · PostgreSQL · MongoDB · Redis · and more
Popular interview topics
Interview questions with clear answers. Open a deck to try the first cards.
- React & Frontend interview questionsHooks, rendering, state and performance
- JavaScript & TypeScript interview questionsClosures, the event loop, types and generics
- Backend Engineering interview questionsAPIs, auth, queues, caching and scaling
- Databases interview questionsSQL, indexes, transactions and NoSQL
- System Design interview questionsLoad balancers, sharding and trade-offs
- AI & Agentic AI interview questionsLLMs, RAG, embeddings and agents
- DevOps & Cloud interview questionsDocker, Kubernetes, CI/CD and AWS
- Security interview questionsOWASP, auth, encryption and XSS
- Testing interview questionsUnit, integration, mocking and TDD
- DSA interview questionsArrays, trees, graphs and dynamic programming
- Coding Problems (Python) interview questions100 classic problems with solutions
How it works
- 1
Sign in with Google
No forms or passwords. Your account is created the first time.
- 2
Pick what your interview is on
Choose languages, databases and topics. Start at your level: beginner, intermediate or advanced.
- 3
Practise, then check your readiness
Questions step up from simple to hard. Your dashboard shows what is solid and what to work on.
Built for real practice
One dashboard
See progress in every section and topic at a glance, and jump straight back in.
Readiness score
Know when you are interview-ready: it rewards acing hard questions in every topic.
Listen and speak
Hear questions read aloud and answer by voice instead of typing.
Saved to your account
Pick up on any device. Progress syncs when you sign in.
Choose your topics
Focus on the decks and languages your next interview is about.
A duck that cheers
Small wins add up, and a duck pops in to celebrate them.
Frequently asked questions
What is HyperTransformer AI?
HyperTransformer AI is an interview preparation platform for developers. It has a Coding Game with 357 fill-in-the-blank questions, 1,103 interview flashcards in 11 decks, and an AI interviewer that asks one question at a time across 35 topics. A dashboard and readiness score show how ready you are.
Which topics can I practise?
Data structures and algorithms, system design, machine learning, generative AI and LLMs, CS fundamentals, Python, JavaScript, TypeScript, React, Node.js, Java, Go, Rust, C++, SQL, PostgreSQL, MongoDB, Redis, DevOps, security, testing and more.
How does the AI interviewer work?
It asks one question at a time, starting at your level. You answer by typing or by voice, and each answer gets a score out of 10, written feedback, the points you missed and a model answer. Questions get harder as you improve.
How is the readiness score worked out?
It rewards doing well on hard questions in every topic you chose, so a high score means you are strong across your whole interview, not just on easy questions.
Do I need an account?
You can browse the first cards of every Study Cards deck without one. Sign in with Google to practise everything and save your progress to your account, so you can pick up on any device.
Does it work on my phone?
Yes. Everything works in a phone browser, including reading questions aloud and answering by voice.