Answer & Solution
Answer: Option B
Solution:
Accessing a const variable before its declaration in a nested block throws a SyntaxError due to the TDZ.
Q
What is the behavior of accessing a const variable before its declaration in a nested block in JavaScript?
Related Questions on Average
What happens if you access a var variable before its declaration in JavaScript?
A). A. ReferenceError
B). B. TypeError
C). C. undefined
D). D. No error
What is the behavior of accessing a var variable within a block 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 can you avoid issues related to hoisting and TDZ in JavaScript?
A). A. Always declare variables at the bottom of the code
B). B. Use var for all variable declarations
C). C. Declare variables with let or const and avoid accessing them early
D). D. None of the above
What is the result of the following code snippet?
A). A. SyntaxError
B). B. ReferenceError
C). C. TypeError
D). D. No error
What is the behavior of accessing a let variable before its declaration in JavaScript?
A). A. SyntaxError
B). B. ReferenceError
C). C. undefined
D). D. No error
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
How can you ensure that a const variable is initialized before use in JavaScript?
A). A. Use let instead of const for all variables
B). B. Declare const variables at the top of their scope
C). C. Assign a default value to const variables
D). D. None of the above
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
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
How does hoisting affect const declarations in JavaScript?
A). A. const variables are hoisted with their initial values
B). B. const variables are hoisted but cannot be accessed before declaration
C). C. const variables are hoisted and can be accessed before declaration
D). D. Hoisting does not affect const declarations