JavaScript-Developer-I Leak Questions

A developer creates an object where its properties should be immutable and prevent

properties from being added or modified.

Which method should be used to execute this business requirement ?

A developer has an ErrorHandler module that contains multiple functions.

What kind of export should be leveraged so that multiple functions can be used?

Refer to code below:

Let a =’a’;

Let b;

// b = a;

console.log(b);

What is displayed when the code executes?

A developer writes the code below to return a message to a user attempting to register a new username. If the username is available, a variable named nag is declared and assigned a value on line 03.

What is the value of msg when getAvailableabilityMessage (“newUserName”) is executed and get Availability (“newUserName”) returns true?