Answer & Solution
Answer: Option A
Solution:
Block scope helps in reducing variable conflicts and maintaining clean code by limiting the visibility of variables.
Q
What is the benefit of block scope in JavaScript?
Related Questions on Average
Which of the following demonstrates lexical scoping?
A). Closure
B). Hoisting
C). Global scope
D). Local scope
What happens if you declare a variable with the same name in both function and block scopes?
A). It creates two separate variables
B). It causes an error
C). It combines the scopes
D). It prioritizes the function scope
How do you declare a block-scoped variable in ES6?
A). var
B). let
C). const
D). function
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
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
Which of the following is true about function scope in JavaScript?
A). Variables are accessible globally
B). Variables are accessible only within their functions
C). Variables are accessible within an object
D). Variables are accessible everywhere in the code
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
Can function-scoped variables be accessed from outside their functions?
A). Yes
B). No
C). Only if they are constants
D). Only if they are defined globally
How do you declare a function-scoped variable using ES6?
A). var
B). let
C). const
D). function
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