Answer & Solution
Answer: Option D
Solution:
To handle accidental variable redeclaration, use meaningful variable names and prefer let or const for variable declarations.
Q
How can you handle cases where you accidentally redeclare a variable in JavaScript?
Related Questions on Average
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
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 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
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 result of the following code snippet?
A). A. SyntaxError is thrown
B). B. 20
C). C. 30
D). D. Error
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. SyntaxError is thrown
B). B. 20
C). C. 30
D). D. undefined
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
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