What is block scope in JavaScript?
A). Variables scoped to a block
B). Variables scoped to a function
C). Variables scoped globally
D). Variables scoped locally
How do you declare a function-scoped variable using ES6?
A). var
B). let
C). const
D). function
What is the difference between let and var in terms of function scope?
A). let is block-scoped, var is function-scoped
B). let is function-scoped, var is block-scoped
C). They are both block-scoped
D). They are both function-scoped
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
How do you declare a block-scoped variable in ES6?
A). var
B). let
C). const
D). function
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 happens to a function-scoped variable outside of its function?
A). It becomes a global variable
B). It becomes a local variable
C). It is accessible only within the function
D). It throws an error
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 output of console.log(blockVar); outside of a block if let blockVar = 'Block'; is defined inside a block?
A). Block
B). undefined
C). Error
D). null
What is function scope in JavaScript?
A). Variables defined within a function
B). Variables defined outside a function
C). Variables defined within an object
D). Variables defined globally