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Free Certified JavaScript Developer I Exam Braindumps (page: 12)

Page 11 of 57
PDF with 224 Questions

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

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

Answer(s): A



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?

  1. "Username available"
  2. "newUserName"
  3. "Msg is not defined"
  4. undefined

Answer(s): D



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



A)



B)



C)



D)

  1. Option A
  2. Option B
  3. Option C
  4. Option D

Answer(s): A



A developer wants to set up a secure web server withNode.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?

  1. const https =require(`https');
  2. const server =require(`secure-server');
  3. const tls = require(`tls');
  4. const http =require(`http');

Answer(s): A






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