Answer & Solution
Answer: Option D
Solution:
When redeclaring a variable with var, the variable reference is updated to the new value, and no error is thrown.
Q
What is the behavior when redeclaring a variable with var in JavaScript?
Related Questions on Average
Which keyword allows variable redeclaration in JavaScript?
A). A. var
B). B. let
C). C. const
D). D. none of the above
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 output of the following code snippet?
A). A. 10
B). B. 20
C). C. 30
D). D. Error
What is the behavior of a redeclared variable in JavaScript with const?
A). A. It retains its original value
B). B. It becomes undefined
C). C. It throws a SyntaxError
D). D. It inherits the value from the outer scope
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 result of the following code snippet?
A). A. SyntaxError is thrown
B). B. 10
C). C. 20
D). D. 30
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 let or const?
A). A. Global scope
B). B. Function scope
C). C. Block scope
D). D. Module scope
How can you handle cases where you accidentally redeclare a variable in JavaScript?
A). A. Use var for all variable declarations
B). B. Use meaningful variable names to avoid conflicts
C). C. Use let or const for variable declarations within the same scope
D). D. Both B and C
Which statement about redeclaring variables in JavaScript is true?
A). A. Redeclaring variables is a best practice
B). B. Redeclaring variables leads to clearer code
C). C. Redeclaring variables can lead to confusion and bugs
D). D. Redeclaring variables has no effect