21 interview questions for developers (2025)

13 votes1269 runs0 comment

12 votes1258 runs0 comment

10 votes1202 runs0 comment

8 votes1313 runs

8 votes1180 runs

7 votes728 runs1 comment

6 votes1228 runs0 comment

type-inference

5 votes1218 runs0 comment

5 votes1209 runs0 comment

5 votes1169 runs0 comment

configuration

4 votes1209 runs0 comment

4 votes1175 runs0 comment

3 votes1203 runs0 comment

3 votes1182 runs

configuration

tsconfig.json

3 votes1181 runs1 comment

2 votes286 runs1 comment

1 vote708 runs0 comment

Jakeat Nov 3, 2023

1 vote531 runs2 comments

1 vote173 runs0 comment

0 vote1181 runs2 comments

21 interview questionsfor developers (2025)

Test your developer skills before an interview with 21 corrected questions on 80+ topics. Beginner, Intermediate or Expert level.

21 interview questionsfor developers (2025)

Test your developer skills before an interview with 21 corrected questions on 80+ topics. Beginner, Intermediate or Expert level.

Which of the following utility types makes all properties of a given type optional?

Define a custom type that represents a coordinate with an x and y property of type number in Typescript

Typescript: What is the type of result?

Create a generic identity function that returns the passed value in Typescript

Write a generic interface in Typescript

Import an add function from a TypeScript module math.ts

Typescript: What is the inferred type of the result variable?

Typescript: What is the resulting type of MyType in the following TypeScript code?

Find the error in the following TypeScript code:

What file is used to configure TypeScript?

Explain the difference between the `any` and `unknown` types in TypeScript.

What is the result of compiling the following TypeScript code?

Create a utils namespace that contains a Logger class for handling logging.

Which configuration option in tsconfig.json allows specifying files to include in the compilation?

What is the main purpose of generics in TypeScript?

What is the resulting type of Exclude<string | number | boolean, number>?

What is a tuple in TypeScript?

Declare a string type variable in TypeScript

Write a function in TypeScript that takes a number as input and returns its square.

How to apply a class decorator to a TypeScript class?