Answer & Solution
Answer: Option B
Solution:
Variables declared with let can be accessed from outer blocks, but variables declared with var are function-scoped.
Q
How can you access a variable declared in an inner block from an outer block?
Related Questions on Average
What is the main difference between var and let in terms of scope?
A). var is block-scoped, let is function-scoped
B). var is function-scoped, let is block-scoped
C). Both var and let are block-scoped
D). Both var and let are function-scoped
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 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 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 if you try to access a block-scoped variable outside its block?
A). The variable is accessible globally
B). The variable is accessible within its block
C). An error occurs
D). The variable is accessible within a function
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
Which keyword introduces block-scoped variables in JavaScript?
A). var
B). let
C). const
D). function
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
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(i); outside the loop if let i = 10; is declared inside a loop?
A). 10
B). undefined
C). Error
D). 0