Type system / Q201-Q205

TypeScript Type System Foundations

TypeScript strict mode, compiler configuration, structural typing, assignability, type compatibility, type inference, literal types, widening, discriminated unions, narrowing, exhaustiveness, generics, constraints, and reusable type API design.

Practicing strict TypeScript configuration, structural typing, inference, narrowing, and reusable generic APIs.

Revision Sheet

Fast review notes for this batch of senior frontend topics.

Cheat Sheet

Compact definitions, warnings, and senior-level anchors.

Mock Interview

A realistic interviewer-led sequence across the batch.

PDF Export

Printable batch pack for offline revision.

Questions Covered

Q201TypeScript Strict Mode and Compiler ConfigurationOpen the full chapter, then return here for revision.Q202Structural Typing, Assignability and Type CompatibilityOpen the full chapter, then return here for revision.Q203Type Inference, Literal Types and WideningOpen the full chapter, then return here for revision.Q204Union Types, Narrowing and ExhaustivenessOpen the full chapter, then return here for revision.Q205Generics, Constraints and Reusable Type APIsOpen the full chapter, then return here for revision.