How Do You Implement Inheritance in TypeScript?

• Using extends keyword, we can implement inheritance.

How Does TypeScript Support Optional Parameters in Function as in JavaScript Every Parameter is Optional for a Function? Using ?

• Example function fun(arg1:number, arg2?:number){}

What is an Export and Default Export in typescript?

• Any variable, function, class or interface can be exported by using the export keyword.
• After using export keyword, you can access your variable, function, class or interface from outside of the module.

What is an Interface in TypeScript?

• An interface in TypeScript is similar to other object oriented programming languages interfaces.
• An interface is a way to define a contract on a function with respect to the arguments.