Salesforce JAVASCRIPT-DEVELOPER-I Online Practice Questions and Exam Preparation

Salesforce JAVASCRIPT-DEVELOPER-I Online Questions & Answers

• Question 221:

  A developer has a web serverrunning with Node.js. The command to start the web server is node server.js. The web server started having latency issues. Instead of a one second turnaround for web requests, the developer now sees a five second turnaround.

  Which command can the web developer run to see what the module is doing during the latency period?

  A. NODE_DEBUG=true node server.js
  B. DEBUG=http, https node server.js
  C. NODE_DEBUG=http,https node server.js
  D. DEBUG=true node server.js
  D. DEBUG=true node server.js

• Question 222:

  The developerwants to test the array shown:

  const arr = Array(5).fill(0)

  Which two tests are the most accurate for this array?

  Choose 2 answers:

  A. console.assert( arr.length === 5 );
  B. arr.forEach(elem => console.assert(elem === 0)) ;
  C. console.assert(arr[0] === 0andand arr[ arr.length] === 0);
  D. console.assert (arr.length >0);
  A. console.assert( arr.length === 5 );
  B. arr.forEach(elem => console.assert(elem === 0)) ;

• Question 223:

  Refer to the code declarations below:

  

  Whichthree expressions return the string JavaScript? Choose 3 answers

  A. Str1.join (str2);
  B. Str1.concat (str2);
  C. Concat (str1, str2);
  D. $(str1) $ (str2} `;
  E. Str1 + str2;
  B. Str1.concat (str2);
  D. $(str1) $ (str2} `;
  E. Str1 + str2;