the table of contents ✎

Chapters

Each chapter has the most-asked interview questions with model answers, a quiz, flashcards and a mock interview to practice with, and deep-dive notes where it matters most.

Frontend

The browser, the language and the frameworks.
JSCh. 01

JavaScript

Closures, hoisting, prototypes & the event loop.

99 Qs · 7 notes0%
TSCh. 02

TypeScript

Generics, narrowing, utility & mapped types.

84 Qs · 3 notes0%
ReactCh. 03

React

Hooks, rendering, memoization & state.

103 Qs · 3 notes0%
AngularCh. 04

Angular

Change detection, DI, signals & RxJS.

94 Qs · 3 notes0%
HTML/CSSCh. 05

HTML & CSS

Semantics, the box model, layout & a11y.

85 Qs · 1 note0%
{ }Bonus

Coding round

Debounce, Promise.all, LRU cache… write it, run the tests.

14 challenges0 solved

Backend

Servers, services and the languages behind them.
NodeCh. 06

Node.js

Event loop phases, streams & modules.

87 Qs · 1 note0%
JavaCh. 07

Java

OOP, collections, JVM, concurrency & streams.

20 Qs · 0 notes0%
PythonCh. 08

Python

Data model, generators, decorators & the GIL.

20 Qs · 0 notes0%
MicroCh. 09

Microservices

Service design, messaging, resilience & sagas.

10 Qs · 0 notes0%

Databases

Relational and document stores, queries and design.
SQLCh. 10

SQL & PostgreSQL

Joins, indexes, transactions & query tuning.

20 Qs · 0 notes0%

Fundamentals

Algorithms and architecture: asked everywhere.
DSACh. 11

Data Structures & Algorithms

Big-O, arrays, trees, graphs & DP patterns.

10 Qs · 0 notes0%
DesignCh. 12

System Design

Feeds, autocomplete, caching & performance.

90 Qs · 1 note0%
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