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Upon passing the Salesforce JavaScript-Developer-I Exam, candidates will receive a Salesforce Certified JavaScript Developer I certification. Salesforce Certified JavaScript Developer (JS-Dev-101) certification serves as a validation of the candidate's expertise in developing custom applications on the Salesforce platform using JavaScript. It also demonstrates their ability to implement best practices and design patterns in JavaScript development. Salesforce Certified JavaScript Developer (JS-Dev-101) certification is recognized globally and can lead to new career opportunities in Salesforce development.

Salesforce JavaScript-Developer-I Certification Exam is a highly respected certification in the Salesforce community. Salesforce Certified JavaScript Developer (JS-Dev-101) certification is an excellent way for developers to showcase their skills and expertise in Salesforce development, and it is recognized by employers as a valuable credential. Salesforce Certified JavaScript Developer (JS-Dev-101) certification is also a great way for developers to keep up with the latest trends and best practices in Salesforce development, as the exam is regularly updated to reflect changes in the platform.

Salesforce JavaScript-Developer-I Exam Syllabus Topics:

TopicDetails
Topic 1
  • Objects, Functions, and Classes: In this section, the focus is on applying object-oriented principles, functions, and classes. As a Salesforce JavaScript programmer, you will need to locate optimal function implementations and understand how to structure objects and classes for business solutions. You will also be tested on your ability to use JavaScript modules and decorators, while analyzing variable scope and execution flow.
Topic 2
  • Debugging and Error Handling: This section will measure the ability of JavaScript programmer to properly handle errors and debug JavaScript code. You will be expected to apply debugging techniques, such as using the console and breakpoints, to resolve issues. Proper error handling is crucial, and the exam will evaluate your skills in managing and correcting errors efficiently within your code.
Topic 3
  • Asynchronous Programming: Asynchronous programming is a key concept in JavaScript, and this section tests your understanding of event loops, asynchronous code execution, and handling promises. Salesforce JavaScript programmer will need to demonstrate their ability to implement asynchronous solutions for business requirements.
Topic 4
  • Variables, Types, and Collections: The topic will test how effectively JavaScript programmers can handle variable creation, initialization, type coercion, and data manipulation. You will need to demonstrate knowledge of strings, numbers, dates, arrays, and JSON handling. The Javascript Developer I exam will require a deep understanding of these concepts and their proper application in real-world scenarios.
Topic 5
  • Testing: In the topic, you will be required to evaluate unit tests and improve them. The exam will assess your ability to identify ineffective tests and modify them to make them more robust and accurate. This topic ensures that you can write and maintain effective tests, a crucial skill for ensuring code quality and reliability in professional environments.
Topic 6
  • Server Side JavaScript: This section focuses on Node.js and server-side JavaScript. Salesforce JavaScript programmers will be tested on their ability to identify appropriate Node.js implementations and commands for given scenarios. Additionally, you will need to recognize which Node.js core modules, libraries, and package management solutions fit specific requirements, reflecting your understanding of server-side development with JavaScript.

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Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q30-Q35):

NEW QUESTION # 30
Refer to the code below:

What are the value of objBook and newObBook respectively?

Answer: D


NEW QUESTION # 31
Refer to the code below:
let car1 = new Promise((_ ,reject)=> setTimeout(reject,2000,"Car1 crashed in")); let car2 = new Promise(resolve => setTimeout(resolve,1500,"Car2 completed")); let car3 = new Promise(resolve => setTimeout(resolve,3000,"Car3 completed")); Promise.race([car1,car2,car3])
.then(value=>{
let result = `${value} the race.`;
}).catch(err=>{
console.log('Race is cancelled.',err);
});
What is the value of result when promise.race execues?

Answer: A


NEW QUESTION # 32
Given the code below:
01 function Person(name, email) {
02 this.name = name;
03 this.email = email;
04 }
05
06 const john = new Person( ' John ' , ' john@email.com ' );
07 const jane = new Person( ' Jane ' , ' jane@email.com ' );
08 const emily = new Person( ' Emily ' , ' emily@email.com ' );
09
10 let usersList = [john, jane, emily];
Which method can be used to provide a visual representation of the list of users and to allow sorting by the name or email attribute?

Answer: B

Explanation:
We have an array of plain objects:
[
{ name: ' John ' , email: ' john@email.com ' },
{ name: ' Jane ' , email: ' jane@email.com ' },
{ name: ' Emily ' , email: ' emily@email.com ' }
]
We want:
* A "visual representation" of the list.
* Ability to sort by name or email in DevTools.
console.table:
* console.table(data) renders data as a table in most browser devtools and Node consoles that support it.
* Each object becomes a row; properties (name, email) become columns.
* Many DevTools UIs allow:
* Clicking column headers to sort by that column.
* Filtering / viewing in a structured way.
So:
console.table(usersList);
Displays a sortable table of users by name or email. This matches the requirement exactly.
Other options:
* console.group(usersList);
* Starts a console group. The argument is just logged as a line label.
* It does not create a table or sortable view; it just groups subsequent logs.
* console.groupCollapsed(usersList);
* Same grouping behavior, but collapsed by default.
* Again, no table or sortable columns.
* console.info(usersList);
* Logs the array in the console, but as a standard log/info.
* You can expand objects, but there is no table view or built-in column sorting.
Therefore, the correct method is:
The answer: A
Study Guide / Concept References (no links):
* console.table for tabular logging
* console.group and console.groupCollapsed for grouped logs
* console.log / console.info standard logging behavior
* DevTools UI support for sorting columns in console.table


NEW QUESTION # 33
bar, awesome is a popular JavaScript module. the versions publish to npm are:

Teams at Universal Containers use this module in a number of projects. A particular project has thepackage, json definition below.

A developer runs this command: npm install.
Which version of bar .awesome is installed?

Answer: D


NEW QUESTION # 34
At Universal Containers, every team has its own way of copying JavaScript objects. The code snippet shows an implementation from one team:

What is the output of the code execution?

Answer: A


NEW QUESTION # 35
......

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