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TypeScript Interview Questions and Answers

Related differences

JavaScript vs TypeScript

Ques 21. What are type guards in TypeScript?

Type guards are expressions that help TypeScript narrow down the type of a variable within a certain code block.

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Ques 22. How do you declare and use a class in TypeScript?

Classes in TypeScript are declared using the 'class' keyword, and objects are created using the 'new' keyword.

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Ques 23. What is the 'for...of' loop in TypeScript?

The 'for...of' loop in TypeScript is used to iterate over the values of an iterable object, such as an array or a string.

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Ques 24. What is the 'keyof' operator in TypeScript?

The 'keyof' operator in TypeScript is used to obtain the union type of all possible keys of an object type.

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Ques 25. How do you use the 'import' statement in TypeScript?

The 'import' statement in TypeScript is used to import modules or exports from other files.

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