Typescript

Question 1

What is TypeScript?

Answer 1

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

Question 2

True or False: TypeScript helps catch errors at compile time.

Answer 2

True

Question 3

What is one major benefit of using TypeScript in large-scale applications?

Answer 3

Improved maintainability and scalability of the codebase.

Question 4

Fill in the blank: TypeScript provides _____ typing, which helps in identifying type-related errors early.

Answer 4

static

Question 5

What feature of TypeScript allows for better documentation and understanding of code?

Answer 5

Type annotations

Question 6

Multiple Choice: Which of the following is a benefit of TypeScript?
A) Dynamic typing

B) Improved IDE support

C) Slower performance

Answer 6

B) Improved IDE support

An integrated development environment (IDE) is a software application that helps programmers write, test, and build software.
IDEs can help programmers be more efficient and productive by combining tools into a single application.

Question 7

How does TypeScript enhance team collaboration in large projects?

Answer 7

By providing clear contracts through interfaces and types.

Question 8

True or False: TypeScript can be gradually adopted in existing JavaScript projects.

Answer 8

True

Question 9

What is the role of interfaces in TypeScript?

Answer 9

Interfaces define the shape of objects and enforce type checking.

Question 10

Fill in the blank: TypeScript’s _____ feature allows developers to define custom types.

Answer 10

union

For context, unions look something like this: function printId(id: number | string) {}

Question 11

What advantage does TypeScript provide for refactoring code?

Answer 11

Type checking helps ensure that changes do not introduce new errors.

Question 12

Multiple Choice: Which feature helps TypeScript provide better autocompletion in IDEs? A) Type inference B) Dynamic types C) Loose typing

Answer 12

A) Type inference

Question 13

True or False: TypeScript can only be used with React applications.

Answer 13

False

Question 14

What is ‘type inference’ in TypeScript?

Answer 14

Type inference is the ability of TypeScript to automatically deduce types based on the assigned values.

Question 15

What benefit does TypeScript offer regarding third-party libraries?

Answer 15

TypeScript provides type definitions for many popular libraries, improving integration and type safety.