TypeScript quiz

TypeScript adds static types to JavaScript. This quiz hits interfaces, generics, narrowing, and how types help large codebases scale.

This run has 10 questions. Each item may have 1 to 4 correct answers - mark all that apply. You have 20 seconds per question.

Select every answer that applies (1-4 may be correct).

TypeScript interviews probe generics, narrowing, and how types scale in large codebases. Run this quiz before senior front-end or full-stack loops where static typing is non-negotiable.

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