Module quiz: Programming Paradigms in Javascript

Variables declared using 'let' can be reassigned.
- true
- false

What will print out when the following code runs?

 function scopeTest() {
     var y = 44;

     console.log(x);
 }

 var x = 33;
 scopeTest();

null
undefined
33
44

What will print out when the following code runs?

 class Cake {
     constructor(lyr) {
         this.layers = lyr;
     }

     getLayers() {
         return this.layers;
     }
 }

 class WeddingCake extends Cake {
     constructor() {
         super(2);
     }

     getLayers() {
         return super.getLayers() * 5;
     }
 }

 var result = new WeddingCake();
 console.log(result.getLayers());

What will print out when the following code runs?

 class Animal {

 }

 class Dog extends Animal {
     constructor() {
         super();
         this.noise = "bark";
     }

     makeNoise() {
         return this.noise;
     }
 }

 class Wolf extends Dog {
     constructor() {
         super();
         this.noise = "growl";
     }
 }

 var result = new Wolf();
 console.log(result.makeNoise());

bark
growl
undefined

Consider this code snippet: 'const [a, b] = [1,2,3,4] '. What is the value of b?
- undefined
- 1
- 2
- [1,2,3,4]
What value will be printed out when the following code runs?
```
 function count(...food) {
     console.log(food.length)
 }

 count("Burgers", "Fries", null);
```
- 2
- 3
- "Burgers", "Fries", null
- "Burgers", "Fries", undefined
Which of the following are JavaScript methods for querying the Document Object Model? Select all that apply.
- getElementsByClassName
- getElementsById
- getElementById
- getElementByClassName
- queryAllSelectors
- querySelector
Which of the following methods convert a JavaScript object to and from a JSON string?
- JSON.parse
- JSON.stringify
- JSON.fromString
- JSON.toString
What will be the result of running this code?
```
 const letter = "a"
 letter = "b"
```
- Uncaught TypeError: Assignment to constant variable
- b
- a
- Uncaught SyntaxError: Invalid or unexpected token
What is a constructor?
- A function that is called to create an instance of an object.
- An instance of a class.
- A specific object that has been created using the class name.
- An object literal

David Nguyen

David Nguyen

Module quiz: Programming Paradigms in Javascript