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Salesforce JavaScript-Developer-I Exam Syllabus Topics:

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

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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q40-Q45):

NEW QUESTION # 40
A developer uses a parsed JSON string to work with user information as in the block below:
01 const userInformation ={
02 " id " : "user-01",
03 "email" : "user01@universalcontainers.demo",
04 "age" : 25
Which two options access the email attribute in the object?
Choose 2 answers

Answer: B,D


NEW QUESTION # 41
Refer to the code below:

Considering that JavaScript is single-threaded, what is the output of line 08 after the code executes?

Answer: A


NEW QUESTION # 42
Refer to the code below:

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

Answer: A


NEW QUESTION # 43
Refer to the code below:
Function Person(firstName, lastName, eyecolor) {
this.firstName =firstName;
this.lastName = lastName;
this.eyeColor = eyeColor;
}
Person.job = 'Developer';
const myFather = new Person('John', 'Doe');
console.log(myFather.job);
What is the output after the code executes?

Answer: B


NEW QUESTION # 44
Given the following code:

What will be the first four numbers logged?

Answer: C


NEW QUESTION # 45
......

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