Answer & Solution
Answer: Option C
Solution:
Redeclared variables with let or const have block scope, meaning they are accessible only within the block in which they are declared.
Q
What is the scope of a redeclared variable in JavaScript with let or const?
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 result of the following code snippet?
A). A. SyntaxError is thrown
B). B. 10
C). C. 20
D). D. 30
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 is the behavior of a redeclared variable in JavaScript with let or const within nested scopes?
A). A. It inherits the value from the outer scope
B). B. It retains its original value within the nested scope
C). C. It throws an error
D). D. It becomes undefined
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 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 result of the following code snippet?
A). A. SyntaxError is thrown
B). B. 20
C). C. 30
D). D. Error
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