Answer & Solution
Answer: Option B
Solution:
let variables are hoisted with their initial values, whereas var variables are hoisted with undefined.
Q
How does hoisting differ between let and var declarations in JavaScript?
Related Questions on Average
Which keyword allows hoisting of variables in JavaScript?
A). A. var
B). B. let
C). C. const
D). D. Both A and B
What is the purpose of the Temporal Dead Zone (TDZ) in JavaScript?
A). A. To prevent variable reassignment
B). B. To catch errors at compile time
C). C. To ensure variables are initialized before use
D). D. To reduce memory usage
How does hoisting affect arrow functions in JavaScript?
A). A. Arrow functions are hoisted with their function bodies
B). B. Arrow functions are hoisted but cannot be accessed before declaration
C). C. Arrow functions are not hoisted
D). D. Hoisting has no effect on arrow functions
What is the behavior of accessing a const variable within a function before its declaration in JavaScript?
A). A. ReferenceError is thrown
B). B. SyntaxError is thrown
C). C. undefined is printed
D). D. No error
How does hoisting affect variable shadowing in JavaScript?
A). A. It allows variables with the same name in different scopes to coexist
B). B. It prevents variables with the same name in different scopes from coexisting
C). C. It has no effect on variable shadowing
D). D. It automatically renames variables with the same name
What happens if you try to reassign a const variable in JavaScript?
A). A. No effect on the variable
B). B. SyntaxError is thrown
C). C. ReferenceError is thrown
D). D. TypeError is thrown
What is the output of the following code snippet?
A). A. TypeError
B). B. 10
C). C. undefined
D). D. SyntaxError
How does hoisting affect function declarations in JavaScript?
A). A. Function declarations are hoisted with their function bodies
B). B. Function declarations are hoisted but cannot be accessed before declaration
C). C. Function declarations are not hoisted
D). D. Hoisting has no effect on function declarations
What is the result of the following code snippet?
A). A. SyntaxError
B). B. ReferenceError
C). C. TypeError
D). D. No error
Which of the following is true about const variables in JavaScript?
A). A. They can be reassigned after declaration
B). B. They can be accessed before declaration
C). C. They cannot be declared without an initial value
D). D. They cannot be hoisted