JavaScript Variables Quiz

What are variables in JavaScript similar to?

• Puzzle pieces

• Functions

• Little boxes to store values

• Strings

• Loops

Which keyword is commonly used to declare a variable in JavaScript?

• const

• let

• int

• float

• var

If you declare a variable without initializing it, what is it called?

• Uninitialized

• Null

• Empty

• Undefined

• Zeroed

What does initializing a variable mean?

• Naming it

• Assigning a value to it

• Creating a box for it

• Naming and assigning a value to it

• Deleting it

Which of the following is the correct way to declare and initialize a variable to store the number 10?

• int number = 10;

• number = 10;

• var number = 10;

• float number = 10;

• number 10;

What is the output of the following code? `var value = 53; value = 75; console.log(value);`

• 53

• 75

• 5375

• Error

• None of the above

Which type of variable is used to hold true or false values?

• String

• Integer

• Char

• Float

• Boolean

Which variable declaration contains a decimal point and can hold numbers like 2.5?

• Integer

• Char

• String

• Float

• Boolean

How are strings represented in JavaScript?

• like this "Alice"

• Without quotes

• Using special characters

• Using numbers

• All of the above

What type of value does the following variable hold? `var apple = "fruit";`

• Integer

• Float

• Boolean

• String

• Char