Week 5.2

Which of the following is a valid way to declare a global variable in JavaScript?

• var myVar = "Hello";

• let myVar = "Hello";

• const myVar = "Hello";

• None of the above

What is the scope of a variable declared outside of any function in JavaScript?

• Block Scope

• Local Scope

• Global Scope

• None of the above

What is the scope of a variable declared inside a block in JavaScript?

• Block Scope

• Local Scope

• Global Scope

• None of the above

Which of the following is true about the scope of variables declared with the keyword "let" in JavaScript?

• They have block scope

• They have local scope

• They have global scope

• None of the above

Which of the following is true about the scope of variables declared with the keyword "const" in JavaScript?

• They have block scope

• They have local scope

• They have global scope

• None of the above

How many numerical types are there in JavaScript?

• 1

• 2

• 3

• 4

What is the escape character in JavaScript?

• !

• *

• !=

• /

What is the value of Boolean("false") in JavaScript?

• true

• false

What is the underlying representation of Boolean values in JavaScript?

• 0 for true

  1 for false

• 2 for true

  0 for false

• 1 for true

  0 for false

• 0 for true

  2 for false

Which function can be used to check the Boolean value of any expression in JavaScript?

• typeof

• Boolean()

• isTrue()

• Number()