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
Can const be used for objects and arrays?
A). No
B). Yes
C). Only for arrays
D). Only for objects
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 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 is the primary difference between var and let?
A). Scope
B). Initialization
C). Data type
D). Assignment
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
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
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
What is the scope of a variable declared with let?
A). Global
B). Function
C). Block
D). Object
Which keyword is used to declare a read-only named constant?
A). let
B). var
C). const
D). static