Answer & Solution
Answer: Option B
Solution:
A let variable cannot be redeclared in the same scope, which helps prevent errors and confusion in the code.
Q
Can a let variable be redeclared in the same scope?
Related Questions on Average
Can const variables be reassigned in nested scopes?
A). Yes
B). No
C). Only if they are strings
D). Only in strict mode
What is the value of a const variable once it is assigned?
A). Can be changed later
B). Cannot be changed later
C). Depends on the data type
D). Undefined initially
What will the following code output: { let y = 5; { let y = 10; console.log(y); } }?
A). 5
B). 10
C). undefined
D). ReferenceError
Can a variable declared with let be hoisted?
A). Yes, partially
B). No
C). Yes, fully
D). Only in strict mode
What will be the output of the following code: let x = 10; { let x = 20; } console.log(x);?
A). 10
B). 20
C). undefined
D). ReferenceError
Can const be used for objects and arrays?
A). No
B). Yes
C). Only for arrays
D). Only for objects
What error will the following code produce: const PI; PI = 3.14;?
A). SyntaxError
B). TypeError
C). ReferenceError
D). No error
What is the output of the following code: let z = 3; z = 5; console.log(z);?
A). 3
B). 5
C). undefined
D). ReferenceError
Are variables declared with let and const accessible before they are declared?
A). Yes
B). No
C). Only in strict mode
D). Only if they are numbers
Which keyword allows block-level scope in ES6?
A). var
B). let
C). function
D). var and function