Agents and Tool Calling: What Could Go Wrong?
Forty-two questions on how tool-using agents break. Covers schema and description design, the agent loop and when it stops, parallel versus sequential calls, idempotency under...
With Quizbun, every choice comes with an explanation, so you learn something new with each try. Browse the Catalog, bring your own quizzes, or ask your AI to write one for you.
Learn, don’t grade
Learning before testing
This is not an exam. Pick an answer (right or wrong) and the explanation opens immediately. The score is a side effect; the “aha” is the point.
- Pick an answer
- Explanation opens
- The “aha”
Local-first
Private by design
Your own quizzes and your progress stay on your device. There’s no account and no backend, so your data has nowhere else to go.
- On your device
- In your browser
- Never uploaded
How it works, technically
Quizbun bakes the public Catalog into the site at build time; your private quizzes and progress live in your browser’s IndexedDB. What happens in IndexedDB stays in IndexedDB.
Featured quizzes
Data Structures Hiding in Your Codebase: A Field Guide for Frontend Engineers
Algorithms feel abstract until you spot them in the code you already ship. This quiz is for frontend engineers who want to understand algorithms by recognising the data...
Why Buildings Don't Fall Down
A beginner-friendly structural engineering Quiz about forces, load paths, and design trade-offs. It focuses on mental models: how bridges, towers, arches, floors, columns, and...
English for Code Reviews
Practical English for pull requests and code reviews, organized as a small curriculum: commit subjects and PR titles, PR descriptions, the grammar that trips up non-native...
Recently added
Color on the Web: Gamut, Gamma & Why Your Gradient Goes Gray
#808080 is not half as bright as white, a 50%-lightness yellow and a 50%-lightness blue are nothing alike, and a blue-to-yellow gradient turns gray in the middle for a reason....
Compression: What Actually Shrinks
Compression is the cheapest performance win on the web and the one most often applied to the wrong bytes. This Quiz covers what makes data compressible, how Huffman and LZ77...
How Mechanisms Work: What Happens When This Turns?
Rotation goes in; something surprising comes out. A differential lets two wheels turn at different speeds while both are driven, a Geneva drive turns smooth rotation into...
Infrastructure You Walk Past
A photo-based field guide to the machinery on every street corner: transformers, cutouts, cell sites, hydrants, backflow preventers, cathodic protection posts, manhole covers,...
p50, p95, p99: What Averages Hide
Your average response time is 120 ms and your users are angry. This Quiz is about the gap between those two facts: how latency distributions really look, which statistics...
Read the Git Graph: Commits, Parents & What Rewriting Really Does
Git is a graph, not a timeline. Almost every confusing thing it does makes sense the moment you can see the parent pointers. This quiz gives you the graph before a command and...
Read the Network Waterfall
The network panel already knows why your page is slow. It just says so in a language most people never learned to read. This quiz teaches the bars: what each segment of a...
Read the Trace: Spans, Waterfalls & What They Confess
A distributed trace is a picture of one request's life across every service it touched. Once you can read the shape, the bug is often obvious before you open a single log line....
Why That Building Looks Like That
The gap in the sidewalk, the little holes along the bottom of a brick wall, the groove under a window ledge: buildings are covered in details that look like sloppiness and are...
Copyright & Licenses for People Who Ship Code
What MIT's one condition actually obliges you to do, why Apache-2.0's patent grant is the reason big companies prefer it, what really triggers AGPL section 13, and why "no...