Answer & Solution
Answer: Option A
Solution:
javascript console.log(num); const num = 10; Accessing num before its declaration throws a SyntaxError due to the TDZ.
Q
What is the result of the following code snippet?
Related Questions on Average
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
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 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
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
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
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
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 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
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