21 interview questions for developers (2025)

13 votes1326 runs0 comment

12 votes1313 runs0 comment

10 votes1251 runs0 comment

8 votes1368 runs

8 votes1230 runs

7 votes777 runs1 comment

6 votes1281 runs0 comment

type-inference

5 votes1271 runs0 comment

5 votes1262 runs0 comment

5 votes1218 runs0 comment

configuration

4 votes1258 runs0 comment

4 votes1225 runs0 comment

3 votes1252 runs0 comment

3 votes1231 runs

configuration

tsconfig.json

3 votes1230 runs1 comment

2 votes335 runs1 comment

1 vote757 runs0 comment

Jakeat Nov 3, 2023

1 vote574 runs2 comments

1 vote180 runs0 comment

0 vote1230 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?