TypeScript Interview Questions

Type system, generics, utility types, type guards, declaration merging, and advanced patterns.

30 questions in this section

Type System Fundamentals (Beginner)
Generics & Utility Types (Intermediate)
Type Guards & Narrowing (Intermediate)
Why TypeScript? JS vs TS (Beginner)
Basic Types & Annotations (Beginner)
Arrays, Tuples & Enums (Beginner)
Functions & Overloads (Beginner)
Object Types & Optional Props (Beginner)
Union & Intersection Types (Intermediate)
Literal Types & const Assertions (Intermediate)
unknown vs any vs never (Beginner)
Type Assertions & Non-Null (Intermediate)
Discriminated Unions (Intermediate)
Mapped Types (Advanced)
Conditional Types & infer (Advanced)
Template Literal Types (Advanced)
Utility Types (Partial, Pick, etc.) (Intermediate)
keyof & typeof Operators (Intermediate)
Index Signatures & Record (Intermediate)
Class Types & Interfaces (Intermediate)
Abstract Classes & Implements (Intermediate)
Declaration Files (.d.ts) (Advanced)
Module Augmentation (Advanced)
Decorators (Experimental) (Advanced)
TypeScript with React (Intermediate)
TypeScript with Node/Express (Intermediate)
Generic Constraints & Defaults (Intermediate)
Recursive Types (Advanced)
tsconfig Deep Dive (Beginner)
Migration: JS to TS (Intermediate)

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