TypeScript Technology & Digital Tools 3

Question 1

What does the `paths` option in `tsconfig.json` allow you to configure?

Accepted Answer

Module path aliases for cleaner imports

Answer

The `paths` option maps import aliases to real file paths, enabling imports like `@utils/helper` instead of relative paths.

Question 2

Which npm package provides TypeScript type definitions for Node.js built-in modules?

Accepted Answer

@types/node

Answer

`@types/node` ships declaration files for Node.js APIs like `fs`, `path`, and `http`.

Question 3

What is the purpose of the `declaration` compiler option in `tsconfig.json`?

Accepted Answer

Generates `.d.ts` type declaration files alongside JavaScript output

Answer

Setting `declaration: true` instructs `tsc` to emit `.d.ts` files so library consumers get full type information.

Question 4

Which Prettier configuration file format is commonly used in TypeScript projects to enforce consistent code formatting?

Accepted Answer

.prettierrc

Answer

`.prettierrc` is the standard Prettier configuration file where you define formatting rules like print width and tab width.

Question 5

What happens when you set `noEmit: true` in `tsconfig.json`?

Accepted Answer

The compiler performs type checking but does not produce any output files

Answer

`noEmit: true` runs the type checker without writing JavaScript or declaration files, useful for CI type-checking pipelines.

TypeScript Practice Test