Chapter 1: TypeScript Basics

1. What are the five primitive types?

• string: Represents a sequence of Unicode characters
• number: Represents both integers and floating-point numbers
• boolean: Represents a logical true or false
• undefined: Represents a value that hasn't been initialized yet
• null: Represents no value

2. What will the inferred type be for the flag variable be in the following code?

 const flag = false;

flag will be inferred as the boolean type.

3. What's the difference between an interface and a type alias?

The main difference is that type aliases can't be extended or implemented from, like you can with interfaces.

4. What is wrong with the following code?

class Product {
  constructor(public name: string, public unitPrice: number) {}
}

let table = new Product();
table.name = "Table";
table.unitPrice = 700;

The constructor requires name and unitPrice...