What is the benefit of block scope in JavaScript?
A). It reduces variable conflicts
B). It increases global scope
C). It simplifies variable declarations
D). It makes variables inaccessible
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 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
Which keyword introduces block-scoped variables in JavaScript?
A). var
B). let
C). const
D). function
How can you access a variable declared in an inner block from an outer block?
A). Using the var keyword
B). Using the let keyword
C). Using the const keyword
D). Using the this keyword
What is the purpose of block scope in JavaScript?
A). To limit the visibility and accessibility of variables
B). To make variables global
C). To create constants
D). To execute functions
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 hoisting in JavaScript?
A). Moving variables to the top of their function or global scope
B). Making variables undefined
C). Creating new variables
D). None of the above
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
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