21 interview questions for developers (2026)

13 votes1409 runs0 comment

12 votes1397 runs0 comment

11 votes1331 runs0 comment

8 votes1451 runs

8 votes1305 runs

7 votes851 runs1 comment

6 votes1364 runs0 comment

type-inference

5 votes1353 runs0 comment

5 votes1345 runs0 comment

5 votes1294 runs0 comment

configuration

4 votes1332 runs0 comment

4 votes1299 runs0 comment

3 votes1331 runs0 comment

3 votes1305 runs

configuration

tsconfig.json

3 votes1304 runs1 comment

2 votes408 runs1 comment

1 vote830 runs0 comment

Jakeat Nov 3, 2023

1 vote638 runs2 comments

1 vote194 runs0 comment

0 vote1305 runs2 comments

21 interview questionsfor developers (2026)

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

21 interview questionsfor developers (2026)

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?