Knowledge check: Welcome to Programming with JavaScript

Knowledge check: Welcome to Programming with JavaScript

Question 1: What is the data type of the value "Hello, World"?
- string
- number
- boolean
Question 2: What is the data type of the value true ?
- string
- number
- boolean
Question 3: What is the % operator?
- The modulus operator
- The division operator
- The concatenation operator
Question 4: What happens when you use the + operator on two strings?
- They get joined into a single string
- You can't use the + operator on two strings
Question 5: What is the operator symbol && represent in JavaScript?
- The logical OR operator
- The logical AND operator
- The logical NOT operator
Question 6: What happens when you use the + operator on a string and a number?
- Nothing - you can't use the + operator on different data types
- They get joined together as if both of them were strings
Question 7: What is the value of i after the following code runs?
```
 var i = 7;
 i += 1;
 i += 2;
```
- 7
- 8
- 9
- 10