Test Your TypeScript Skills

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Questions and Answers

What is TypeScript?

A free and open-source programming language developed by Microsoft (correct)
A paid programming language developed by Microsoft
A programming language developed by Google
An open-source programming language developed by Apple

What is TypeScript?

A closed-source programming language developed by Google that adds dynamic typing to JavaScript.
A free and open-source programming language developed by Microsoft that adds static typing with optional type annotations to JavaScript. (correct)
A markup language used for styling websites.
A programming language developed by Apple that adds machine learning capabilities to JavaScript.

What does TypeScript add to JavaScript?

Static typing with optional type annotations (correct)
Dynamic typing
Functional programming
Object-oriented programming

What is the purpose of TypeScript?

To develop large applications (C) Signup and view all the answers

What are definition files in TypeScript?

Files that contain type information of existing JavaScript libraries (D) Signup and view all the answers

What is a definition file in TypeScript?

A file that contains type information of existing JavaScript libraries (C) Signup and view all the answers

Is TypeScript a superset or subset of JavaScript?

Superset (C) Signup and view all the answers

Is TypeScript a superset or subset of JavaScript?

Superset (C) Signup and view all the answers

What is TypeScript designed for?

The development of large applications (C) Signup and view all the answers

Can TypeScript be used for both client-side and server-side execution?

Yes (B) Signup and view all the answers

Can TypeScript be used for both client-side and server-side execution?

Yes (A) Signup and view all the answers

What is the TypeScript compiler written in?

TypeScript (C) Signup and view all the answers

When was TypeScript released to the public?

October 2012 (C) Signup and view all the answers

What is the TypeScript compiler written in?

TypeScript (B) Signup and view all the answers

When was TypeScript 5.0 released?

16 March 2023 (A) Signup and view all the answers

When was TypeScript 5.0 released?

March 16, 2023 (D) Signup and view all the answers

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Study Notes

TypeScript is a free and open-source programming language developed by Microsoft that adds static typing with optional type annotations to JavaScript. TypeScript supports definition files that can contain type information of existing JavaScript libraries. TypeScript is a superset of JavaScript, so all JavaScript programs are syntactically valid TypeScript. TypeScript is designed for the development of large applications and transpiles to JavaScript. TypeScript may be used to develop JavaScript applications for both client-side and server-side execution. The TypeScript compiler is itself written in TypeScript and compiled to JavaScript. TypeScript was released to the public in October 2012, with version 0.8, after two years of internal development at Microsoft. TypeScript 5.0 was released on 16 March 2023.