CRT-600 Certification Exam Questions with AI Explanations

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

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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?

"Username available"
"newUserName"
"Msg is not defined"
undefined

Answer(s): D

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QUESTION: 44

Given the requirement to refactor the code above to JavaScript class format, which class definition is correct?

Answer(s): A

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QUESTION: 45

A developer wants to set up a secure web server with Node.js. The developer creates a directory locally called app-server, and the first file is app-server/index.js Without using any third-party libraries, what should the developer add to index.js to create the secure web server?

const https =require(`https');
const server =require(`secure-server');
const tls = require(`tls');
const http =require(`http');

Answer(s): A

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Salesforce Prepare for your JavaScript Developer I Certification Exam CRT-600 Dumps in PDF

Free Salesforce CRT-600 Real Questions (page: 43)

QUESTION: 41

QUESTION: 42

QUESTION: 43

QUESTION: 44

QUESTION: 45