JavaScript Interview Study Note PDF

Topics Covered

1. 1JavaScript Runtime Basics

   Language vs engine vs runtime, browser APIs, Node APIs, and event loop fundamentals.
   1

   JavaScript Runtime Basics

   Language vs engine vs runtime, browser APIs, Node APIs, and event loop fundamentals.

2. 2Data Types And Memory

   Primitives, objects, references, shallow copy, deep copy, NaN, null, undefined, and special values.
   2

   Data Types And Memory

   Primitives, objects, references, shallow copy, deep copy, NaN, null, undefined, and special values.

3. 3Equality And Coercion

   Truthy/falsy values, == vs ===, Object.is, and safe comparison habits.
   3

   Equality And Coercion

   Truthy/falsy values, == vs ===, Object.is, and safe comparison habits.

4. 4Scope, Hoisting, Closures, And this

   var, let, const, temporal dead zone, closures, call/apply/bind, and arrow functions.
   4

   Scope, Hoisting, Closures, And this

   var, let, const, temporal dead zone, closures, call/apply/bind, and arrow functions.

5. 5Objects, Prototypes, And Classes

   Prototype chain, class syntax, inheritance, methods, destructuring, spread, and optional chaining.
   5

   Objects, Prototypes, And Classes

   Prototype chain, class syntax, inheritance, methods, destructuring, spread, and optional chaining.

6. 6Arrays, Modules, And Error Handling

   map, filter, reduce, Set, Map, imports, exports, fetch, try/catch, and async errors.
   6

   Arrays, Modules, And Error Handling

   map, filter, reduce, Set, Map, imports, exports, fetch, try/catch, and async errors.

7. 7Promises And Event Loop

   promises, async/await, microtasks, tasks, timers, queueMicrotask, and Node.js event-loop notes.
   7

   Promises And Event Loop

   promises, async/await, microtasks, tasks, timers, queueMicrotask, and Node.js event-loop notes.

8. 8Browser JS And Performance

   DOM, events, event delegation, fetch behavior, memory leaks, debounce, and throttle.
   8

   Browser JS And Performance

   DOM, events, event delegation, fetch behavior, memory leaks, debounce, and throttle.

9. 9Coding Round Helpers

   debounce, throttle, memoize, once, groupBy, curry, and common implementation mistakes.
   9

   Coding Round Helpers

   debounce, throttle, memoize, once, groupBy, curry, and common implementation mistakes.

What You Will Get

• 11-page detailed PDF guide
• JavaScript interview explanations
• Code snippets and examples
• Comparison tables
• Common coding-round utilities
• Browser and Node.js notes
• Interview Q&A and cheat sheet

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