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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

Section	Objectives
Browser and DOM Interaction	- Browser APIs (fetch, storage, timers) - Event handling and propagation - DOM manipulation and traversal
Testing and Debugging	- Unit testing principles - Debugging techniques and tools
JavaScript Language Fundamentals	- ES6+ syntax and features - Data types, variables, and operators - Functions, scope, and closures
Salesforce Platform Integration	- Calling Apex methods from JavaScript - Lightning Web Components (LWC) JavaScript usage - Security considerations in Salesforce JavaScript
Asynchronous JavaScript	- Promises and async/await - Error handling in async workflows - Event loop and concurrency model

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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q125-Q130):

NEW QUESTION # 125
A developer has an ErrorMandler module that contains multiple functions.
What kind of export should be leveraged so that multiple function can be used?

A. All
B. default
C. Multi
D. Named

Answer: D

NEW QUESTION # 126
Universal containers (UC) just launched a new landing page, but users complain that the website is slow, A developer found some functions that cause this problem, To verify this, the developer decides to execute everything and log the time each of these suspicious function consumes.

Which function can then developer use to obtain the time spent by every one of the three functions?

A. Console, timestamp
B. Console.getTime ( )
C. Console,trace ( )
D. Console.timeLog ( )

Answer: B

NEW QUESTION # 127
developer uses the code below to format a date.

After executing, what is the value of formattedDate?

A. May 10, 2020
B. October 05, 2020
C. November 05, 2020
D. June 10, 2020

Answer: D

NEW QUESTION # 128
A developer wrote the following code:
01 let X = object.value;
02
03 try {
04handleObjectValue(X);
05 } catch (error) {
06 handleError(error);
07 }
Thedeveloper has a getNextValue function to execute after handleObjectValue(), but does not want to execute getNextValue() if an error occurs.
How can the developer change the code to ensure this behavior?

A. 03 try {04 handleObjectValue(x)05 ........................
B. 03 try{04 handleObjectValue(x);05 }catch(error){06 handleError(error);07 } then {08 getNextValue();09 }
C. 03 try{04 handleObjectValue(x);05 } catch(error){06 handleError(error);07 }08 getNextValue();
D. 03 try{04 handleObjectValue(x);05 } catch(error){06 handleError(error);07 } finally {08 getNextValue();10 }

Answer: A

NEW QUESTION # 129
Refer to the code:

Given the code above, which three properties are set pet1?
Choose 3 answers:

A. canTalk
B. Owner
C. Name
D. Type
E. Size

Answer: A,D,E

NEW QUESTION # 130
......

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