Questions

Here are some questions to test what you have learned in this first chapter. The answers can be found in the appendix.

Good luck!

1. What are the 5 primitive types?
2. What would the inferred type be for the flag variable be in the following code?

 const flag = false;

3. What's the difference between an interface and a type alias?
4. What is wrong with the following code? How could this be resolved?

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

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

5. If we want our TypeScript program to support IE11, what should the compiler--target option be?
6. Is it possible to get the TypeScript compiler to transpile ES6 .js files? If so, how?
7. How can we prevent console.log() statements from getting into our code?