Answer & Solution
Answer: Option C
Solution:
Redeclaring variables in JavaScript can lead to confusion and bugs, as it can override values and lead to unexpected behavior.
Q
Which statement about redeclaring variables in JavaScript is true?
Related Questions on Average
What is the behavior of a redeclared variable in JavaScript?
A). A. It retains its original value
B). B. It retains its last assigned value
C). C. It becomes undefined
D). D. It throws an error
What is the output of the following code snippet?
A). A. SyntaxError is thrown
B). B. 20
C). C. 30
D). D. undefined
Which keyword should you use to avoid redeclaring variables in JavaScript?
A). A. var
B). B. let
C). C. const
D). D. Both B and C
How can you avoid accidentally redeclaring variables in JavaScript?
A). A. Always use var for variable declarations
B). B. Use meaningful variable names to avoid conflicts
C). C. Declare variables once and avoid redeclaration
D). D. Use let or const for variable declarations within the same scope
What is the output of the following code snippet?
A). A. 10
B). B. 20
C). C. 30
D). D. Error
What is the scope of a redeclared variable in JavaScript with let or const?
A). A. Global scope
B). B. Function scope
C). C. Block scope
D). D. Module scope
What is the result of the following code snippet?
A). A. SyntaxError is thrown
B). B. 10
C). C. 20
D). D. 30
What is variable redeclaring in JavaScript?
A). A. Changing the value of a variable
B). B. Declaring the same variable again within the same scope
C). C. Deleting a variable
D). D. Assigning multiple values to a variable
Which keyword allows redeclaring variables in JavaScript?
A). A. let
B). B. var
C). C. const
D). D. Both A and C
What is the result of the following code snippet?
A). A. SyntaxError is thrown
B). B. 20
C). C. 30
D). D. Error