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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Variables, Types, and Collections23%- Arrays and collections
- Strings, numbers, and dates
- Truthy and falsy evaluations
- JSON parsing and manipulation
- Variable declarations and initialization
- Type coercion and conversion
- Primitive and complex data types
Topic 2: Server Side JavaScript8%- Core Node.js modules
- Node.js fundamentals
- CLI commands
- Server-side JavaScript implementations
- Package management (npm)
Topic 3: Browser and Events17%- Event handling and listeners
- DOM manipulation
- Browser-specific APIs
- Browser Developer Tools usage
- Event propagation (bubbling and capturing)
- Interacting with forms and user input
Topic 4: Objects, Functions, and Classes25%- Prototypal inheritance
- Variable scope and closures
- Higher-order functions
- ES6 classes and inheritance
- Function declarations and expressions
- Execution flow and context
- Arrow functions
- Modules and decorators
- Object creation and manipulation
Topic 5: Testing7%- Test coverage and reliability
- Writing and modifying unit tests
- Unit testing concepts
- Test effectiveness evaluation
Topic 6: Asynchronous Programming13%- Asynchronous patterns for business requirements
- Async/Await syntax
- Promises (creation, chaining, error handling)
- Callbacks
- Event loop and execution flow
Topic 7: Debugging and Error Handling7%- Console methods for debugging
- Breakpoints and code inspection
- Custom error types
- Error handling techniques (try/catch/finally)

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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q67-Q72):

NEW QUESTION # 67
01 function changeValue(obj) {
02 obj.value = obj.value / 2;
03 }
04 const objA = {value: 10};
05 const objB = objA;
06
07 changeValue(objB);
08 const result = objA.value;
What is the value of result after the code executes?

Answer: A

Explanation:
* objA is { value: 10 }.
* objB = objA; # both variables reference the same object .
* changeValue(objB);:
obj.value = obj.value / 2; // modifies the shared object
So:
* objA.value becomes 10 / 2 = 5.
Thus result is 5.


NEW QUESTION # 68
A developer needs to debug a Node.js web server because a runtime error keeps occurring at one of the endpoints.
The developer wants to test the endpoint on a local machine and make the request against a local server to look at the behavior. In the source code, the server.js file will start the server. The developer wants to debug the Node.js server only using the terminal.
Which command can the developer use to open the CLI debugger in their current terminal window?
(With corrected typing errors: node_inspect # node inspect, node_start_inspect # node start inspect.)

Answer: D


NEW QUESTION # 69
Refer to HTML below:
<div id ="main">
<div id = " card-00">This card is smaller.</div>
<div id = "card-01">The width and height of this card is determined by its contents.</div>
</div>
Which expression outputs the screen width of the element with the ID card-01?

Answer: A


NEW QUESTION # 70
Given the requirement to refactor the code above to JavaScript class format, which class definition is correct?

A)

B)

C)

D)

Answer: C


NEW QUESTION # 71
A developer has an ErrorHandler module that contains multiple functions.
What kind of export be leverages so that multiple functions can be used?

Answer: A


NEW QUESTION # 72
......

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