typescript

Which of the following statements about TypeScript is true?

• TypeScript is a superset of JavaScript.

• TypeScript is a programming language developed by Microsoft.

• TypeScript code is directly executed by the browser.

• TypeScript is only used for front-end development.

Which TypeScript feature allows you to define a new type based on an existing type?

• Classes

• Generics

• Interfaces

• Enums

Which keyword is used to indicate that a parameter in a TypeScript function is optional?

• optional

• required

• maybe

• ?

Which operator is used for type assertion in TypeScript?

• like

• type

• as

• <>

What is the purpose of the "strictNullChecks" compiler flag in TypeScript?

• It enables strict type checking for null and undefined values.

• It allows null and undefined to be used interchangeably.

• It is not a valid compiler flag in TypeScript.

• It disables type checking for null and undefined values.

Which TypeScript feature allows you to specify multiple types for a variable?

• Optional Types

• Union Types

• Intersection Types

• Tuple Types

What does the "readonly" modifier do in TypeScript?

• It allows a property to be modified only within the same class.

• It restricts a variable to read-only access within a specific scope.

• Readonly is not a valid modifier in TypeScript.

• It makes a property or variable immutable.