2026 Latest DumpsKing JS-Dev-101 PDF Dumps and JS-Dev-101 Exam Engine Free Share: https://drive.google.com/open?id=1dOgpHsEHu5NHmzgZHL62CsASlO5ejsUL
The social environment is constantly changing, and our JS-Dev-101 guide quiz is also advancing with the times. The content of JS-Dev-101 exam materials is constantly updated. You can save a lot of time for collecting real-time information. In order to ensure that you can see the updated JS-Dev-101 practice prep as soon as possible, our system sends the updated information to your email address first timing. In order to avoid the omission of information, please check your email regularly.
| Topic | Details |
|---|---|
| Topic 1 |
|
| Topic 2 |
|
| Topic 3 |
|
| Topic 4 |
|
| Topic 5 |
|
>> JS-Dev-101 Reliable Exam Question <<
Features of our web-based certification for Salesforce Certified JavaScript Developer - Multiple Choice (JS-Dev-101) practice test and the desktop simulation software for Salesforce JS-Dev-101 exam questions are similar. The web-based JS-Dev-101 practice test is supported by operating systems. It is an internet-based self-assessment test, eliminating the need for any software installation. The web-based Salesforce JS-Dev-101 Practice Exam is compatible with major browsers. Get a demo of our products, it's free to use. Upon completing the purchase, you will be able to immediately download the full version of our DumpsKing Salesforce Certified JavaScript Developer - Multiple Choice (JS-Dev-101) practice questions product.
NEW QUESTION # 107
Given the following code:
01 counter = 0;
02 const logCounter = () => {
03 console.log(counter);
04 };
05 logCounter();
06 setTimeout(logCounter, 2100);
07 setInterval(() => {
08 counter++;
09 logCounter();
10 }, 1000);
What will be the first four numbers logged?
Answer: A
Explanation:
Comprehensive and Detailed Explanation From Exact Extract JavaScript knowledge:
We need to track the value of counter and the timing of each call to logCounter.
Initial state:
Line 01: counter = 0;
Line 02-04: logCounter logs the current value of counter.
Execution order and timing:
Line 05: logCounter();
Called immediately at time t = 0 ms.
counter is 0.
First log: 0.
Line 06: setTimeout(logCounter, 2100);
Schedules logCounter to run once after 2100 ms.
No log yet at this line.
Line 07-10: setInterval(() => { counter++; logCounter(); }, 1000);
Schedules a repeating callback every 1000 ms (1 second).
First interval callback runs at t ≈ 1000 ms.
Now follow the timeline:
t = 0 ms:
logCounter(); from line 05
Logs: 0
t = 1000 ms (first interval execution):
counter++; → counter goes from 0 to 1.
logCounter(); logs 1.
t = 2000 ms (second interval execution):
counter++; → counter goes from 1 to 2.
logCounter(); logs 2.
t = 2100 ms (timeout from line 06):
logCounter(); runs again.
counter is still 2 (next setInterval will be at t = 3000 ms).
Logs 2.
So the first four logs are:
0
1
2
2
Concatenated as in the options: 0122.
Therefore, the correct choice is:
Study Guide / Concept Reference (no links):
setTimeout and setInterval timing behavior
Order of execution in the event loop
Closures capturing variables (here, logCounter using counter)
Understanding asynchronous scheduling in JavaScript
________________________________________
NEW QUESTION # 108
Refer to the following array:
let arr = [1, 2, 3, 4, 5];
Which two lines of code result in a second array, arr2, created such that arr2 is a reference to arr?
Answer: A,B
Explanation:
The correct answers are C and D.
Arrays in JavaScript are objects. When an array variable is assigned directly to another variable, both variables point to the same array in memory.
Option C is correct:
let arr2 = arr;
This does not create a new array. It creates another reference to the same array.
Example:
arr2.push(6);
console.log(arr);
Output:
[1, 2, 3, 4, 5, 6]
Changing arr2 also affects arr because both variables reference the same array.
Option D is also correct:
let arr2 = arr.sort();
The sort() method sorts the array in place and returns the same array reference. Therefore, arr2 refers to the same array object as arr.
The incorrect options create copies:
let arr2 = arr.slice(0, 5);
creates a shallow copy.
let arr2 = Array.from(arr);
also creates a new shallow copy.
So the two lines that make arr2 reference the original arr are C and D.
NEW QUESTION # 109
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 valueof result when promise.race execues?
Answer:
Explanation:
Car2 completed the race.
NEW QUESTION # 110
Universal Container(UC) just launched a new landing page, but users complain that the website is slow. A developer found some functions that cause this problem.To verify this, the developer decides to do everything and log the time each of these three suspicious functions consumes.
console.time('Performance');
maybeAHeavyFunction();
thisCouldTakeTooLong();
orMaybeThisOne();
console.endTime('Performance');
Which function can the developer use to obtain the time spent by every one of the three functions?
Answer: A
NEW QUESTION # 111
Refer to the codebelow:
function foo () {
const a =2;
function bat() {
console.log(a);
}
return bar;
}
Why does the function bar have access to variable a ?
Answer: B
NEW QUESTION # 112
......
If you are still hesitating whether to select DumpsKing, you can free download part of our exam practice questions and answers from DumpsKing website to determine our reliability. If you choose to download all of our providing exam practice questions and answers, DumpsKing dare 100% guarantee that you can pass Salesforce Certification JS-Dev-101 Exam disposably with a high score.
JS-Dev-101 Reliable Test Question: https://www.dumpsking.com/JS-Dev-101-testking-dumps.html
P.S. Free 2026 Salesforce JS-Dev-101 dumps are available on Google Drive shared by DumpsKing: https://drive.google.com/open?id=1dOgpHsEHu5NHmzgZHL62CsASlO5ejsUL