Q
What will happen if you try to reassign a value to a constant declared with const in JavaScript?

Answer & Solution

Answer: Option a
Solution:
Constants declared with const in JavaScript cannot be reassigned, and attempting to do so will result in an error. The correct option is a. It will throw an error.
Related Questions on Average

Which of the following variable names is valid in JavaScript?

A). a. my variable

B). b. _variable

C). c. 3variable

D). d. variable$

What is the difference between var and let in terms of scope in JavaScript?

A). a. Both have function scope

B). b. Both have block scope

C). c. var has block scope, let has function scope

D). d. var has function scope, let has block scope

What does hoisting refer to in JavaScript variable declarations?

A). a. Declaring a variable multiple times

B). b. Initializing a variable before declaring

C). c. Moving variable declarations to the top

D). d. Using undeclared variables

What is the difference between var and let in terms of scope in JavaScript?

A). a. Both have function scope

B). b. Both have block scope

C). c. var has block scope, let has function scope

D). d. var has function scope, let has block scope

What keyword is used to declare variables in JavaScript?

A). a. var

B). b. const

C). c. let

D). d. def

What is the outcome of console.log(typeof x); if x is declared but not initialized in JavaScript?

A). a. Undefined

B). b. Null

C). c. Error

D). d. Object

What does hoisting refer to in JavaScript variable declarations?

A). a. Declaring a variable multiple times

B). b. Initializing a variable before declaring

C). c. Moving variable declarations to the top

D). d. Using undeclared variables

Which keyword is used to declare a variable that cannot be reassigned in JavaScript?

A). a. var

B). b. let

C). c. const

D). d. mutable

Which of the following variable names is valid in JavaScript?

A). a. my variable

B). b. _variable

C). c. 3variable

D). d. variable$

What is the outcome of console.log(typeof x); if x is declared but not initialized in JavaScript?

A). a. Undefined

B). b. Null

C). c. Error

D). d. Object