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Salesforce JS-Dev-101 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Objects, Functions, and Classes | 25% | - ES6 classes, inheritance, modules, decorators - Object creation, properties, prototypes - Function types, scope, closures, arrow functions |
| Topic 2: Variables, Types, and Collections | 23% | - Data types, type coercion, truthy/falsy values - Strings, numbers, dates, arrays and methods - Variable declaration and scope - JSON parsing and manipulation |
| Topic 3: Browser and Events | 17% | - Browser APIs and developer tools - DOM selection and manipulation - Event handling, propagation, listeners |
| Topic 4: Asynchronous Programming | 13% | - Event loop and execution flow - Callbacks, promises, async/await |
| Topic 5: Testing | 7% | - Test coverage and improvement - Unit test structure and effectiveness |
| Topic 6: Debugging and Error Handling | 7% | - Error types and handling strategies - Console usage, breakpoints and debugging techniques |
| Topic 7: Server Side JavaScript | 8% | - Node.js fundamentals and core modules - Package management and CLI tools |
Salesforce Certified JavaScript Developer - Multiple Choice Essentials: What Candidates Ask
- Debugging and Error Handling (7%)
- Objects, Functions, and Classes (25%)
- Server Side JavaScript (8%)
Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions:
A developer imports:
import printPrice from '/path/PricePrettyPrint.js';
What must be true about printPrice for this import to work?
- A. printPrice must be a multi export
- B. printPrice must be the default export
- C. printPrice must be a named export
- D. printPrice must be an all export
Correct Answer: B 🗳️
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Refer to the code below:
const searchText = 'Yay! Salesforce is amazing!';
let result1 = searchText.search(/sales/i);
let result2 = searchText.search(/sales/);
console.log(result1);
console.log(result2);
After running this code, which result is displayed on the console?
- A. 5
-1 - B. 5
undefined - C. true
false - D. 5
0
Correct Answer: A 🗳️
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Which statement allows a developer to update the browser navigation history without a page refresh?
- A. window.history.pushState(newStateObject, '', null);
- B. window.customHistory.pushState(newStateObject, '', null);
- C. window.history.updateState(newStateObject, '');
- D. window.history.createState(newStateObject, '');
Correct Answer: A 🗳️
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Refer to the following code block:
01 let array = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11];
02 let output = 0;
03
04 for (let num of array) {
05 if (output > 10) {
06 break;
07 }
08 if (num % 2 == 0) {
09 continue;
10 }
11 output += num;
12 }
What is the value of output after the code executes?
- A. 25
- B. 36
- C. 16
- D. 11
Correct Answer: C 🗳️
Explanation: Only visible for ExamTorrent members. You can sign-up / login (it's free).
A developer writes the code below to return a message to a user attempting to register a new username. If the username is available, a variable named msg is declared and assigned a value on line 03.
function getAvailabilityMessage(item) {
if (getAvailability(item)) {
var msg = "Username available";
return msg;
}
}
- A. "msg is not defined"
- B. "newUserName"
- C. "Username available"
- D. undefined
Correct Answer: C 🗳️
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