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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

SectionObjectives
Testing and Debugging- Unit testing principles
- Debugging techniques and tools
JavaScript Language Fundamentals- Data types, variables, and operators
- Functions, scope, and closures
- ES6+ syntax and features
Salesforce Platform Integration- Security considerations in Salesforce JavaScript
- Lightning Web Components (LWC) JavaScript usage
- Calling Apex methods from JavaScript
Browser and DOM Interaction- Event handling and propagation
- Browser APIs (fetch, storage, timers)
- DOM manipulation and traversal
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 (Q58-Q63):

NEW QUESTION # 58
Given the following code:
let x = null;
console.log(typeof x);
What is the output?

Answer: B


NEW QUESTION # 59
Refer to the code below:

What value can a developer expect when referencing o,js,secondCity?

Answer: D


NEW QUESTION # 60
Given the JavaScript below:

Which code should replace the placeholder comment on line 05 to highlight accounts that match the search string'

Answer: B


NEW QUESTION # 61
A developer wants to use a try...catch statement to catch any error that countSheep () may throw and pass it to a handleError () function.
What is the correct implementation of the try...catch?

Answer: D


NEW QUESTION # 62
A developer is required to write a function that calculates the sum of elements in an
array but is getting undefined every time the code is executed. The developer needs to find
what is missing in the code below.
Const sumFunction = arr => {
Return arr.reduce((result, current) => {
//
Result += current;
//
), 10);
);
Which option makes the code work as expected?

Answer: A


NEW QUESTION # 63
......

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