Answer & Solution
Answer: Option A
Solution:
Hoisting refers to the mechanism of moving variable and function declarations to the top of their containing scope.
Q
What is hoisting in JavaScript?
Related Questions on Average
What is the output of console.log(i); outside the loop if let i = 10; is declared inside a loop?
A). 10
B). undefined
C). Error
D). 0
What happens when you declare a constant with const inside a block and try to reassign it?
A). It throws an error
B). It allows reassignment
C). It assigns the value globally
D). It assigns a default value
How does block scope help prevent variable hoisting issues?
A). By moving variables to the top of the code
B). By restricting variables to their block
C). By making variables accessible globally
D). By assigning default values to variables
What is block scope in JavaScript?
A). Variables scoped globally
B). Variables scoped within a function
C). Variables scoped to a block
D). Variables scoped to an object
What is lexical scoping in JavaScript?
A). Variables scoped to the entire codebase
B). Variables scoped to their functions
C). Variables scoped based on their position in the code
D). Variables scoped based on their names
What does the Temporal Dead Zone (TDZ) refer to?
A). A zone with no variables
B). A zone where variables are in memory but not accessible
C). A zone where variables are accessible globally
D). A zone with limited variable scope
How does block scope affect the visibility of variables in nested blocks?
A). Variables are only visible within their immediate block
B). Variables are visible within all nested blocks
C). Variables are only visible within functions
D). Variables are globally visible
What is the output of console.log(innerVar); outside exampleFunction if let innerVar = 'Hello'; is declared inside exampleFunction?
A). Hello
B). undefined
C). Error
D). null
How can you ensure variable immutability within a block?
A). Declare the variable with var
B). Declare the variable with let
C). Declare the variable with const
D). Assign a default value
What is the output of console.log(blockVar); outside a block if let blockVar = 'Block'; is declared inside a block?
A). Block
B). undefined
C). Error
D). null