Question 1

How many Node.js quiz questions are there?

Accepted Answer

There are 30 questions in total — 10 Beginner, 10 Intermediate, and 10 Advanced. Each level is shuffled on every playthrough so you get a fresh experience each time.

Question 2

What topics does the Node.js quiz cover?

Accepted Answer

The quiz covers the single-threaded model, require() module caching, callbacks and the error-first convention, process.env, the fs module, npm scripts, event loop phases (timers, poll, check), setImmediate vs process.nextTick, streams and backpressure, the cluster module, V8 heap structure, EventEmitter, V8 garbage collection algorithms, CPU profiling, memory leak patterns, the --max-old-space-size flag, hidden classes, and PM2.

Question 3

Does the quiz show runtime output examples?

Accepted Answer

Yes. Most questions include a "Runtime Output" tab that shows Node.js code snippets with their console output or execution order — so you can see exactly what the runtime produces for event loop ordering, stream behaviour, and V8 optimisations.

Question 4

Is this quiz suitable for backend Node.js interview preparation?

Accepted Answer

Yes. The questions are drawn from the Node.js documentation, the V8 engineering blog, and common senior backend engineer interview topics. Each answer includes a best-practice note explaining what experienced engineers do in production.

Question 5

Can I use keyboard shortcuts in the quiz?

Accepted Answer

Yes. Press 1–4 to select an answer, Enter or → to advance to the next question, and Tab to cycle through the explanation tabs (Why This Answer / Runtime Output / Best Practice).

Question 6

Do I need to sign up to take the quiz?

Accepted Answer

No. The Node.js quiz is completely free with no account, login, or download required. Everything runs client-side in your browser.

Node.js Fundamentals Quiz