Salesforce Certified JavaScript Developer (JS-Dev-101) : JavaScript-Developer-I

How to Prepare for Salesforce JavaScript Developer I Exam

Preparation Guide for Salesforce JavaScript Developer I Exam

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For more info read reference:

Salesforce JavaScript-Developer-I Certification leaning site Salesforce JavaScript-Developer-Is Certification resources

Reference: https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101

Salesforce JavaScript-Developer-I Exam Syllabus Topics:

Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions:

Question #1
Refer to the code below:
01 let sayHello = () = > {
02 console.log( ' Hello, World! ' );
03 };
Which code executes sayHello once , two minutes from now?

A. delay(sayHello, 120000);
B. setInterval(sayHello, 120000);
C. setTimeout(sayHello, 120000);
D. setTimeout(sayHello(), 120000);

Question #2
A developer initiates a server with the file server.js and adds dependencies in the source code ' s package.json that are required to run the server.
Which command should the developer run to start the server locally?

A. npm start
B. node start
C. start server.js
D. npm start server.js

Question #3
Refer to the code below:
01 < html lang= " en " >
02 < table onclick= " console.log( ' Table log ' ); " >
03 < tr id= " row1 " >
04 < td > Click me! < /td >
05 < /tr >
06 < /table >
07 < script >
08 function printMessage(event) {
09 console.log( ' Row log ' );
10 event.stopPropagation();
11 }
12
13 let elem = document.getElementById( ' row1 ' );
14 elem.addEventListener( ' click ' , printMessage, false);
15 < /script >
16 < /html >
Which code change should be done for the console to log the following when " Click me! " is clicked?
Row log
Table log

A. Change line 10 to event.stopPropagation(false);
B. Change line 14 to elem.addEventListener( ' click ' , printMessage, true);
C. Remove lines 13 and 14
D. Remove line 10

Question #4
A developer removes the HTML class attribute from the checkout button, so now it is simply:
< button > Checkout < /button >
There is a test to verify the existence of the checkout button, however it looks for a button with class= " blue "
. The test fails because no such button is found.
Which type of test category describes this test?

A. False negative
B. True positive
C. False positive
D. True negative

Question #5
A developer imports:
import printPrice from ' /path/PricePrettyPrint.js ' ;
What must be true about printPrice for this import to work?

A. printPrice must be an all export
B. printPrice must be a named export
C. printPrice must be a multi export
D. printPrice must be the default export

Solutions: