What is the temporal dead zone in ES6?
A). Time between function calls
B). Period between variable declaration and initialization
C). Time between two loops
D). Interval between event listeners
Can const variables be reassigned in nested scopes?
A). Yes
B). No
C). Only if they are strings
D). Only in strict mode
What happens if you try to access a let variable before its declaration?
A). Returns undefined
B). Throws a ReferenceError
C). Returns null
D). Returns an empty string
Can a let variable be redeclared in the same scope?
A). Yes
B). No
C). Only if it is a string
D). Only if it is a number
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
What will the following code output: { let y = 5; { let y = 10; console.log(y); } }?
A). 5
B). 10
C). undefined
D). ReferenceError
What error will the following code produce: const PI; PI = 3.14;?
A). SyntaxError
B). TypeError
C). ReferenceError
D). No error
Which keyword should be used for a variable that might be reassigned?
A). const
B). let
C). var
D). function
Which keyword is used to declare a read-only named constant?
A). let
B). var
C). const
D). static
Can const be used for objects and arrays?
A). No
B). Yes
C). Only for arrays
D). Only for objects