21 interview questions for developers (2026)

13 votes1464 runs0 comment

13 votes1451 runs0 comment

11 votes1383 runs0 comment

8 votes1505 runs

8 votes1354 runs

7 votes900 runs1 comment

6 votes1418 runs0 comment

type-inference

6 votes1402 runs0 comment

5 votes1406 runs0 comment

5 votes1343 runs0 comment

configuration

4 votes1381 runs0 comment

4 votes1347 runs0 comment

3 votes1381 runs0 comment

3 votes1354 runs

configuration

tsconfig.json

3 votes1353 runs1 comment

2 votes456 runs1 comment

1 vote880 runs0 comment

Jakeat Nov 3, 2023

1 vote681 runs2 comments

1 vote203 runs0 comment

0 vote1354 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?

Find the error in the following TypeScript code:

Typescript: What is the resulting type of MyType 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?