QUESTION: 41

GIven a value, which three options can a developer use to detect if the value is NaN? Choose 3 answers !

value == NaN
Object.is(value, NaN)
value === Number.NaN
value ! == value
Number.isNaN(value)

Answer(s): A,E

QUESTION: 42

developer wants to use a module named universalContainersLib and them call functions from it.
How should a developer import every function from the module and then call the fuctions foo and bar ?

import * ad lib from `/path/universalContainersLib.js'; lib.foo();
lib.bar();
import (foo, bar) from `/path/universalContainersLib.js'; foo();
bar();
import all from `/path/universalContaineraLib.js';
universalContainersLib.foo();
universalContainersLib.bar();
import * from `/path/universalContaineraLib.js';
universalContainersLib.foo();
universalContainersLib.bar();

Answer(s): A

Reveal Solution Next Question

Refer to the code snippet:
Function getAvailabilityMessage(item) {
If (getAvailability(item)){
Var msg ="Username available";
}
Return msg;
}
A developer writes this code to return a message to user attempting to register a new username. If the username is available, variable.
What is the return value of msg hen getAvailabilityMessage ("newUserName" ) is executed and getAvailability("newUserName") returns false?