Answer & Solution
Answer: Option B
Solution:
const variables cannot be reassigned in any scope once they are declared and initialized.
Q
Can const variables be reassigned in nested scopes?
Related Questions on Average
What will the following code output: { let y = 5; { let y = 10; console.log(y); } }?
A). 5
B). 10
C). undefined
D). ReferenceError
Can const be used for objects and arrays?
A). No
B). Yes
C). Only for arrays
D). Only for objects
Can a const variable be declared without an initial value?
A). Yes
B). No
C). Only in strict mode
D). Only if it is an object
What is the output of the following code: let z = 3; z = 5; console.log(z);?
A). 3
B). 5
C). undefined
D). ReferenceError
Which keyword is used to declare a read-only named constant?
A). let
B). var
C). const
D). static
What is the scope of a variable declared with let?
A). Global
B). Function
C). Block
D). Object
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 error will the following code produce: const PI; PI = 3.14;?
A). SyntaxError
B). TypeError
C). ReferenceError
D). No error
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 is the primary difference between var and let?
A). Scope
B). Initialization
C). Data type
D). Assignment