Answer & Solution
Answer: Option B
Solution:
Attempting to reassign a const variable in JavaScript throws a SyntaxError because const variables cannot be reassigned after declaration.
Q
What happens if you try to reassign a const variable in JavaScript?
Related Questions on Average
What is the behavior of accessing a const variable before its declaration in a nested block 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 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 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 declare a const variable with the same name as an existing variable in JavaScript?
A). A. SyntaxError is thrown
B). B. The existing variable is reassigned
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 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
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
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 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