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TypeScript interview questions

TypeScript interview questions.

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1.

What is Typescript and why one should use it?

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2.

What are the benefits of TypeScript?

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3.

What is TypeScript and why would I use it in place of JavaScript?

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4.

Explain generics in TypeScript

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5.

What are Modules in Typescript?

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6.

List the built-in types in Typescript

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7.

How to call base class constructor from child class in TypeScript?

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8.

Do we need to compile TypeScript files and why?

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9.

What is TypeScript and why do we need it?

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10.

What is "Decorators" in TypeScript?

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11.

What is Interface in TypeScript?

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12.

What is the difference between Classes and Interfaces in Typescript?

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13.

How to implement class constants in TypeScript?

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14.

What is getters/setters in TypeScript?

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15.

Does TypeScript support all object oriented principles?

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16.

When to use interfaces and when to use classes in TypeScript?

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17.

How could you check null and undefined in TypeScript?

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18.

Which object oriented terms are supported by TypeScript?

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19.

What are the difference beetween Typescript and JavaScript?

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20.

What is a TypeScript Map file?

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21.

Could we use TypeScript on backend and how?

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22.

What is Typings in Typescript?

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23.

What is the default access modifier for members of a class in TypeScript?

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24.

Is that TypeScript code valid? Explain why.

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25.

How TypeScript is optionally statically typed language?

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26.

How To Use external plain JavaScript Libraries in TypeScript?

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27.

Does TypeScript supports function overloading?

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28.

Explain how and why we could use property decorators in TS?

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29.

What are different components of TypeScript?

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30.

How can you allow classes defined in a module to accessible outside of the module?

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31.

What's wrong with that code?

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32.

Are strongly-typed functions as parameters possible in TypeScript?

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33.

What is the difference between "interface vs type" statements?

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34.

What is one thing you would change about TypeScript?

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35.

Explain when to use "declare" keyword in TypeScript

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36.

Is it possible to generate TypeScript declaration files from JS library?

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37.

What are Ambients in TypeScripts and when to use them?

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38.

Explain why that code is marked as WRONG?

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39.

How would you overload a class constructor in TypeScript?

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