2026 Latest ExamBoosts JS-Dev-101 PDF Dumps and JS-Dev-101 Exam Engine Free Share: https://drive.google.com/open?id=1f5OLbC4Tfmi9L45A2QlnkSceTyYn1RoW
People are very busy nowadays, so they want to make good use of their lunch time for preparing for their JS-Dev-101 exam. As is known to us, if there are many people who are plugged into the internet, it will lead to unstable state of the whole network, and you will not use your study materials in your lunch time. If you choice our JS-Dev-101 exam question as your study tool, you will not meet the problem. Because the app of our JS-Dev-101 Exam Prep supports practice offline in anytime. If you buy our products, you can also continue your study when you are in an offline state. You will not be affected by the unable state of the whole network. You can choose to use our JS-Dev-101 exam prep in anytime and anywhere.
| Section | Weight | Objectives |
|---|---|---|
| Server Side JavaScript | 8% | - Salesforce API integration - Modules and file operations - Node.js applications |
| Asynchronous Programming | 13% | - Promises and async/await - Callback patterns - Event loop and asynchronous code execution |
| Variables, Types, and Collections | 23% | - JSON parsing and stringification - Array manipulation (map, filter, reduce, forEach, find) - Type coercion and type conversion - Variable declaration (var, let, const, scoping, hoisting) - String manipulation and Date objects |
| Browser and Events | 17% | - Event handling, propagation, bubbling, and capturing - DOM manipulation - Browser Developer Tools |
| Objects, Functions, and Classes | 25% | - JavaScript modules (export, import) - Higher-order functions and closures - ES6 Classes, constructors, methods, and inheritance - Function declarations, expressions, and arrow functions - Object creation, properties, and prototypal inheritance |
| Debugging and Error Handling | 7% | - Logging strategies and debugging techniques - try-catch blocks |
| Testing | 7% | - Unit testing with Jest - Test-driven development principles - Automated testing strategies |
>> Knowledge JS-Dev-101 Points <<
Our product provides the demo thus you can have a full understanding of our JS-Dev-101 prep torrent. You can visit the pages of the product and then know the version of the product, the characteristics and merits of the JS-Dev-101 test braindumps, the price of the product and the discount. There are also the introduction of the details and the guarantee of our JS-Dev-101 prep torrent for you to read. You can also know how to contact us and what other client's evaluations about our JS-Dev-101 test braindumps. You will pass the JS-Dev-101 exam as our JS-Dev-101 study gude has a pass rate of 99% to 100%.
NEW QUESTION # 41
Refer to the code below:
01 let timedFunction = () => {
02 console.log('Timer called.');
03 };
04
05 let timerId = setInterval(timedFunction, 1000);
Which statement allows a developer to cancel the scheduled timed function?
Answer: A
Explanation:
The code:
let timerId = setInterval(timedFunction, 1000);
setInterval schedules timedFunction to run every 1000 ms.
It returns an interval ID (here stored in timerId), which is used to cancel the interval later.
To cancel:
Use clearInterval(timerId);
This is the standard browser (and Node.js) API:
let id = setInterval(fn, delay);
clearInterval(id); stops future executions of that interval.
Check other options:
B . removeInterval(timerId);
There is no removeInterval function in the standard JavaScript timer API.
C . removeInterval(timedFunction);
Again, no such function; and timers are cancelled by ID, not by the callback function reference.
D . clearInterval(timedFunction);
clearInterval expects the ID returned by setInterval, not the callback function.
Passing the function does not cancel the timer.
Therefore, the correct statement is:
Answe r: A
Study Guide / Concept Reference (no links):
Timer APIs: setInterval and clearInterval
Relationship between timer ID and cancellation
Difference between interval ID and callback function
Basic async timing patterns in JavaScript
NEW QUESTION # 42
01 class Student {
02 constructor(name) {
03 this._name = name;
04 }
05 displayGrade() {
06 console.log(`${this._name} got 70% on test.`);
07 }
08 }
09
10 class GraduateStudent extends Student {
11 constructor(name) {
12 super(name);
13 this._name = "Graduate Student " + name;
14 }
15 displayGrade() {
16 console.log(`${this._name} got 100% on test.`);
17 }
18 }
19 let student = new GraduateStudent("Jane");
20 student.displayGrade();
```
What is the console output?:
Answer: B
NEW QUESTION # 43
Refer to the code below:
01 let o = {
02 get js() {
03 let city1 = String('St. Louis');
04 let city2 = String('New York');
05
06 return {
07 firstCity: city1.toLowerCase(),
08 secondCity: city2.toLowerCase(),
09 }
10 }
11 }
What value can a developer expect when referencing o.js.secondCity?
Answer: B
Explanation:
1. Getter Functions in JavaScript
In JavaScript, when an object uses the get keyword, it defines a getter method. Accessing a getter property executes the function and returns its value. Thus:
o.js
does not return the getter function; instead, it executes the function located at:
get js() { ... }
and returns the object inside the return block.
2. Behavior of String() and toLowerCase()
Inside the getter:
let city1 = String('St. Louis');
let city2 = String('New York');
String() creates a string value.
Then, the returned object is constructed as:
{
firstCity: city1.toLowerCase(),
secondCity: city2.toLowerCase(),
}
The method toLowerCase() is a standard JavaScript string method that returns a new string with all alphabetic characters converted to lowercase.
Therefore:
city2.toLowerCase()
returns:
'new york'
3. Referencing the Property
When the developer writes:
o.js.secondCity
the following happens:
The getter js runs and returns an object.
The returned object includes the property:
secondCity: 'new york'
Accessing .secondCity retrieves the lowercase string 'new york'.
Therefore, the correct value is 'new york'.
Why the Other Options Are Incorrect
A . undefined - incorrect because the property secondCity clearly exists in the returned object.
B . An error - incorrect because no invalid operations occur; all methods and properties are valid.
C . 'New York' - incorrect because toLowerCase() transforms the string to lowercase.
JavaScript Knowledge Reference (Text-Based)
Getter methods using the get keyword return computed values when accessed.
JavaScript String values support the toLowerCase() method, which returns a lowercase version of the original string.
Accessing nested properties like o.js.secondCity triggers the getter, returning the constructed object.
NEW QUESTION # 44
Given the JavaScript below:
01 function filterDOM(searchString){
02 const parsedSearchString = searchString && searchString.toLowerCase();
03 document.querySelectorAll('.account').forEach(account => {
04 const accountName = account.innerHTML.toLowerCase();
05 account.style.display = accountName.includes(parsedSearchString) ? /* Insert code here */;
06 });
07 }
Which code should replace the placeholder comment on line 05 to hide accounts that do not match the search string?
Answer: D
Explanation:
We have a ternary:
account.style.display = accountName.includes(parsedSearchString)
? /* if true */
: /* if false */;
Requirement:
If the account matches the search string โ show it.
If it does not match โ hide it.
For display:
Show: 'block' (or similar visible value).
Hide: 'none'.
So we want:
account.style.display = accountName.includes(parsedSearchString)
? 'block'
: 'none';
That corresponds to option A.
Why others are wrong:
B, C use values suitable for visibility, not display.
D ('none' : 'block') inverts the logic, hiding matches and showing non-matches.
________________________________________
NEW QUESTION # 45
Which statement accurately describes the behavior of the async/await keywords?
Answer: B
Explanation:
When async is added to a function:
async function example() {}
JavaScript guarantees:
The function always returns a Promise, regardless of what is returned inside.
Inside the function, await pauses execution until a Promise resolves.
Code appears synchronous even though it uses asynchronous behavior.
Analysis of each option:
A incorrect:
Not "sometimes"-an async function always returns a Promise.
B incorrect:
Async functions can be called just like normal functions.
C incorrect:
Async/await has nothing to do with classes specifically.
D correct:
This is the standard description:
"Async functions behave asynchronously but allow writing code that looks synchronous." JavaScript Knowledge Reference (text-only) async functions always return Promises.
await pauses execution of the async function.
Async/await syntax creates synchronous-looking code on top of asynchronous operations.
NEW QUESTION # 46
......
It is convenient for our consumers to check Salesforce JS-Dev-101 exam questions free of charge before purchasing the Salesforce Certified JavaScript Developer - Multiple Choice JS-Dev-101 practice exam. To make the Salesforce JS-Dev-101 exam questions content up-to-date for free of cost up to 365 days after buying them, our certified trainers work strenuously to formulate the exam questions in compliance with the Salesforce Certified JavaScript Developer - Multiple Choice JS-Dev-101 Dumps.
Study JS-Dev-101 Reference: https://www.examboosts.com/Salesforce/JS-Dev-101-practice-exam-dumps.html
BONUS!!! Download part of ExamBoosts JS-Dev-101 dumps for free: https://drive.google.com/open?id=1f5OLbC4Tfmi9L45A2QlnkSceTyYn1RoW