Answer & Solution
Answer: Option C
Solution:
const variables in JavaScript must be declared with an initial value and cannot be declared without it.
Q
Which of the following is true about const variables in JavaScript?
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 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 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
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 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 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 differ between let and var declarations in JavaScript?
A). A. Both let and var variables are hoisted with their initial values
B). B. let variables are hoisted with their initial values, var variables are hoisted with undefined
C). C. let variables are not hoisted, var variables are hoisted with their initial values
D). D. Hoisting behavior is the same for let and var 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
What is hoisting in JavaScript?
A). A. A process of lifting heavy objects
B). B. Moving variable and function declarations to the top of their scope
C). C. Reducing code size
D). D. None of the above