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 result of the following code snippet?
A). A. SyntaxError is thrown
B). B. 20
C). C. 30
D). D. Error
How can you avoid redeclaring variables in JavaScript?
A). A. Always use var for variable declarations
B). B. Declare variables once and avoid redeclaration
C). C. Declare variables multiple times for clarity
D). D. Use the same variable name for different values
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 output of the following code snippet?
A). A. SyntaxError is thrown
B). B. 20
C). C. 30
D). D. undefined
What is the scope of a redeclared variable in JavaScript with var?
A). A. Global scope
B). B. Function scope
C). C. Block scope
D). D. Module scope
What is the behavior when redeclaring a variable with var in JavaScript?
A). A. SyntaxError is thrown
B). B. No effect on the variable
C). C. Variable value is changed
D). D. Variable reference is updated
What is the behavior when redeclaring a variable with let or const in JavaScript?
A). A. SyntaxError is thrown
B). B. No effect on the variable
C). C. Variable value is changed
D). D. Variable reference is updated
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
What happens if you declare a variable with var and redeclare it with let or const within the same scope in JavaScript?
A). A. No effect on the variable
B). B. SyntaxError is thrown
C). C. Variable value is changed to undefined
D). D. Variable reference is updated