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Question 1

Hoisting

Answer 1

JavaScript’s default behavior whereby the interpreter moves function declarations and variables to the top of their current scope before code execution

Question 2

Hoisting In the Background

Answer 2

Before execution, code is scanned for variable declarations, and for each variable, a new property is created in the variable environment object

Question 3

Which of the following are hoisted?
* function declarations
* var variables
* let and const variables
* function expressions and arrow functions

Answer 3

• function declarations: YES
• var variables: YES
• let and const variables : NO
• function expressions and arrow functions: DEPENDS if using var or let/const

Question 4

Scope of…?
* function declarations
* var variables
* let and const variables
* function expressions and arrow functions

Answer 4

• function declarations: Block (in strict mode), Function (otherwise)
• var variables: Function (Local)
• let and const variables: Block
• function expressions and arrow functions: DEPENDS if using var or let/const

Question 5

Temporal Dead Zone (TDZ)

Answer 5

• the period of time during which the let and const declarations cannot be accessed
• starts when the code execution enters the block which contains the let or const declaration and continues until the declaration has executed