Answer & Solution
Answer: Option D
Solution:
To avoid redeclaring variables, use let or const in JavaScript, as they do not allow redeclaration within the same scope.
Q
Which keyword should you use to avoid redeclaring variables 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
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
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
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 result of the following code snippet?
A). A. SyntaxError is thrown
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. 10
C). C. 20
D). D. 30
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
What is the output of the following code snippet?
A). A. 10
B). B. 20
C). C. 30
D). D. Error
What is the output of the following code snippet?
A). A. SyntaxError is thrown
B). B. 20
C). C. 30
D). D. undefined