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Salesforce JavaScript-Developer-I (Salesforce Certified JavaScript Developer I) Exam is a certification exam that tests the candidate's knowledge and skills in JavaScript development on the Salesforce platform. JavaScript-Developer-I exam is designed for individuals who have experience in developing custom applications using JavaScript and are looking to enhance their skills and knowledge in Salesforce development. JavaScript-Developer-I Exam covers various topics such as Apex, Visualforce, and Lightning Web Components.

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The Salesforce Certified JavaScript Developer (JS-Dev-101) certification is highly valued in the Salesforce community as it demonstrates a developer's ability to design and develop custom applications on the Salesforce platform using JavaScript. It is also an indication that the developer has a strong understanding of Salesforce's technical architecture and best practices for custom development.

Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q80-Q85):

NEW QUESTION # 80
Refer to HTML below:
<p> The current status of an Order: <span id ="status"> In Progress </span> </p>.
Which JavaScript statement changes the text 'In Progress' to 'Completed' ?

A. document.getElementById(".status").innerHTML = 'Completed' ;
B. document.getElementById("#status").innerHTML = 'Completed' ;
C. document.getElementById("status").Value = 'Completed' ;
D. document.getElementById("status").innerHTML = 'Completed' ;

Answer: D

NEW QUESTION # 81
Which option is a core Node;js module?

A. Ios
B. Memory
C. locale
D. Path

Answer: A,D

NEW QUESTION # 82
Refer to the code below:
01 const objBook = {
02 title: ' JavaScript ' ,
03 };
04 Object.preventExtensions(objBook);
05 const newObjBook = objBook;
06 newObjBook.author = ' Robert ' ;
What are the values of objBook and newObjBook respectively?

A. { author: " Robert " , title: " JavaScript " }
{ author: " Robert " , title: " JavaScript " }
B. { title: " JavaScript " }
{ title: " JavaScript " }
C. { author: " Robert " }
{ author: " Robert " , title: " JavaScript " }
D. { author: " Robert " , title: " JavaScript " }
undefined

Answer: B

Explanation:
* Object.preventExtensions(obj) This built-in JavaScript method marks an object so that no new properties can be added to it. Existing properties can still be read and updated, but adding new ones is disallowed.
* const newObjBook = objBook; Both variables reference the same object in memory. JavaScript objects are assigned by reference, not copied.
* newObjBook.author = " Robert " ; Because the object has been marked as non-extensible, JavaScript will not allow new properties to be added. The behavior depends on mode:
* In non-strict mode: the assignment silently fails and does nothing.
* In strict mode: this would throw a TypeError.
Since nothing indicates strict mode, this is non-strict behavior, making the assignment fail silently.
Therefore, the object remains:
{ title: " JavaScript " }
Both objBook and newObjBook point to the same unchanged object.
This matches option A.
JavaScript knowledge references (text-only)
* Object.preventExtensions() prevents adding new properties.
* Assigning an object to another variable copies the reference, not the object.
* Adding a property to a non-extensible object silently fails in non-strict mode.

NEW QUESTION # 83
A test has a dependency on database.query. During the test the dependency is replaced with an object called database with the method, query, that returns an array. The developer needs to verify how many times the method was called and the arguments used each time.
Which two test approaches describe the requirement?
Choose 2 answers

A. Mocking
B. Black box
C. Integration
D. White box

Answer: A,D

NEW QUESTION # 84
A developer is debugging a web server that uses Node.js The server hits a runtimeerror every third request to an important endpoint on the web server.
The developer added a break point to the start script, that is at index.js at he root of the server's source code. The developer wants to make use of chrome DevTools to debug.
Which command can be run to access DevTools and make sure the breakdown is hit ?

A. Node --inspect index.js
B. Node --inspect-brk index.js
C. node -i index.js
D. Node inspect index.js

Answer: A

NEW QUESTION # 85
......

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