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TypeScript Interview Questions and Answers

Related differences

JavaScript vs TypeScript

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Ques 1. What is TypeScript?

TypeScript is a superset of JavaScript that adds static typing and other features to the language.

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Ques 2. Explain the difference between 'let' and 'const' in TypeScript.

'let' is used to declare variables with block scope, while 'const' is used to declare constants with block scope that cannot be reassigned.

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Ques 3. What are the basic data types in TypeScript?

The basic data types in TypeScript are number, string, boolean, null, undefined, and object.

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Ques 4. How do you define an interface in TypeScript?

Interfaces in TypeScript are defined using the 'interface' keyword, followed by the interface name and a set of property declarations.

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Ques 5. Explain the concept of static typing in TypeScript.

Static typing in TypeScript involves specifying the data types of variables at compile time, which helps catch type-related errors early in the development process.

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