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23 interview questionsfor developers (2024)

Test your developer skills before an interview with 23 corrected questions on 80+ topics. Beginner, Intermediate or Expert level.

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23 questions
Easy
5 votes606 runs0 comment

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

Web developer
functions
typescript
Vincent Cotroat Mar 31, 2023
Easy
5 votes229 runs1 comment

Import an add function from a TypeScript module math.ts

Web developer
import
module
Lucasat May 30, 2023
Easy
4 votes603 runs0 comment

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

Web developer
typescript
types
Vincent Cotroat Mar 29, 2023
Easy
4 votes599 runs0 comment

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

Web developer
typescript
type
Vincent Cotroat Mar 31, 2023
Easy
4 votes256 runs0 comment

Create a generic reverseArray function to reverse the elements of an array while maintaining type safety.

Web developer
arrays
functions
type-safety
Enguerranat Sep 6, 2023
Easy
3 votes571 runs0 comment

Typescript: What is the type of result?

Web developer
typescript
type
Vincent Cotroat Mar 29, 2023
Easy
2 votes594 runs0 comment

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

Web developer
typescript
type
Vincent Cotroat Mar 31, 2023
Easy
2 votes582 runs0 comment

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

Web developer
type-inference
typescript
Vincent Cotroat Mar 29, 2023
Easy
2 votes567 runs1 comment

What is the main purpose of generics in TypeScript?

Web developer
generics
type-safety
Vincent Cotroat Mar 29, 2023
Easy
2 votes565 runs0 comment

Write a generic interface in Typescript

Web developer
interfaces
generics
Vincent Cotroat Mar 29, 2023
Easy
2 votes555 runs0 comment

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

Web developer
configuration
tsconfig.json
Vincent Cotroat Mar 29, 2023
Easy
1 vote662 runs0 comment

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

Web developer
functions
generics
Vincent Cotroat Mar 31, 2023
Easy
1 vote596 runs0 comment

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

Web developer
typescript
type
Vincent Cotroat Mar 29, 2023
Easy
1 vote578 runs0 comment

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

Web developer
typescript
type
Vincent Cotroat Mar 29, 2023
Easy
1 vote575 runs0 comment

Find the error in the following TypeScript code:

Web developer
typescript
interfaces
classes
Vincent Cotroat Mar 29, 2023
Easy
1 vote567 runs0 comment

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

Web developer
classes
namespaces
Vincent Cotroat Mar 29, 2023
Easy
1 vote560 runs0 comment

What file is used to configure TypeScript?

Web developer
configuration
typescript
Vincent Cotroat Mar 29, 2023
Easy
1 vote547 runs0 comment

What is the result of compiling the following TypeScript code?

Web developer
Vincent Cotroat Jan 9, 2024
Easy
1 vote171 runs2 comments

Declare a string type variable in TypeScript

Web developer
typescript
variables
Lucasat May 30, 2023
Easy
0 vote565 runs1 comment

How to apply a class decorator to a TypeScript class?

Web developer
decorators
typescript
Vincent Cotroat Nov 7, 2023