Guaranteed JS-Dev-101 Questions Answers - Unlimited JS-Dev-101 Exam Practice

Wiki Article

2026 Latest TroytecDumps JS-Dev-101 PDF Dumps and JS-Dev-101 Exam Engine Free Share: https://drive.google.com/open?id=1ag724Tztlm3PDnPrEJpcJ0UwjytB16wM

Our JS-Dev-101 preparation quiz are able to aid you enhance work capability in a short time. In no time, you will surpass other colleagues and gain more opportunities to promote. Believe it or not, our JS-Dev-101 study materials are powerful and useful, which can solve all your pressures about reviewing the JS-Dev-101 Exam. You can try our free demo of our JS-Dev-101 practice engine before buying. The demos are free and part of the exam questions and answers.

Professional certification can not only improve staff's technical level but also enhance enterprise's competition. Valid Salesforce JS-Dev-101 latest exam cram pdf will be necessary for every candidate since it can point out key knowledge and most of the real test question. JS-Dev-101 Latest Exam Cram pdf provides you the simplest way to clear exam with little cost.

>> Guaranteed JS-Dev-101 Questions Answers <<

Salesforce JS-Dev-101 Exam Made Easy: TroytecDumps's 3 User-Friendly Questions Formats

The Salesforce JS-Dev-101 PDF is the collection of real, valid, and updated Salesforce JS-Dev-101 practice questions. The JS-Dev-101 PDF dumps file works with all smart devices. You can use the Salesforce Certified JavaScript Developer - Multiple Choice PDF questions on your tablet, smartphone, or laptop and start JS-Dev-101 Exam Preparation anytime and anywhere. The JS-Dev-101 dumps PDF provides you with everything that you must need in Salesforce JS-Dev-101 exam preparation and enable you to crack the final Salesforce JS-Dev-101 exam quickly.

Salesforce JS-Dev-101 Exam Syllabus Topics:

TopicDetails
Topic 1
  • Objects, Functions, and Classes: Covers function, object, and class implementations to meet business requirements, along with the use of modules, decorators, variable scope, and execution flow.
Topic 2
  • Debugging and Error Handling: Covers proper error handling techniques and the use of the console and breakpoints to debug code.
Topic 3
  • Browser and Events: Covers DOM manipulation, event handling and propagation, browser-specific APIs, and using Browser Developer Tools to inspect code behavior.
Topic 4
  • Asynchronous Programming: Covers asynchronous programming concepts and understanding how the event loop controls execution flow and determines outcomes.

Salesforce Certified JavaScript Developer - Multiple Choice Sample Questions (Q81-Q86):

NEW QUESTION # 81
Refer to the code below:
let timeFunction =() => {
console.log('Timer called.");
};
let timerId = setTimeout (timedFunction, 1000);
Which statement allows a developer to cancel the scheduled timed function?

Answer: A


NEW QUESTION # 82
Refer to the code snippet:
01 function getAvailableilityMessage(item) {
02 if (getAvailableility(item)) {
03 var msg = "Username available";
04 }
05 return msg;
06 }
What is the return value of msg when getAvailableilityMessage("newUserName") is executed and getAvailableility("newUserName") returns false?

Answer: B

Explanation:
Key details:
var has function scope, not block scope.
Declaration var msg is hoisted to the top of the function, but initialization only happens if the if condition is true.
Effectively, the function behaves like:
function getAvailableilityMessage(item) {
var msg; // hoisted declaration
if (getAvailableility(item)) {
msg = "Username available";
}
return msg;
}
Now, given:
getAvailableility("newUserName") returns false.
Execution:
The if condition is false, so the body does not execute.
Therefore msg is declared but never assigned.
In JavaScript, an uninitialized variable that has been declared with var has the value undefined.
Thus:
return msg; // returns undefined
Why other options are wrong:
A: "newUserName" - msg never receives the parameter value; it's only set to "Username available" inside the if, which does not run.
B: "msg is not defined" - That kind of error occurs if msg were never declared. Here it is declared via var, so it is defined but undefined.
D: "Username available" - This would require the if branch to run, which it does not when getAvailableility(...) is false.
So the return value is:
undefined
Study Guide Concepts:
var hoisting and function scope
Uninitialized variables default to undefined
Control flow and conditional initialization


NEW QUESTION # 83
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: C

Explanation:
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:
Answe r: A
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 # 84
Which statement can a developer apply to increment the browser's navigation history without a page refresh?
Which statement can a developer apply to increment the browser's navigation history without a page refresh?

Answer: C


NEW QUESTION # 85
Refer to the code below:
01 let country = {
02 get capital() {
03 let city = Number("London");
04
05 return {
06 cityString: city.toString(),
07 }
08 }
09 }
Which value can a developer expect when referencing country.capital.cityString?

Answer: B

Explanation:
In the getter:
let city = Number("London");
The Number() constructor attempts to convert the string "London" into a numeric value.
"London" is not a valid numeric string.
When JavaScript attempts numeric conversion of a non-numeric string:
Number("London") → NaN
Next line:
city.toString()
When city is NaN, calling .toString() yields:
NaN.toString() → "NaN"
The getter returns:
{
cityString: "NaN"
}
The question asks:
Which value can a developer expect?
The multiple-choice options include NaN, but not "NaN".
Given the available choices, the intended correct answer is B (NaN) because the root cause is the Number("London") conversion returning NaN.
JavaScript Knowledge Reference (text-only)
Number(nonNumericString) returns NaN.
NaN.toString() produces "NaN".
Getters compute and return their values each time the property is accessed.


NEW QUESTION # 86
......

To obtain the Salesforce certificate is a wonderful and rapid way to advance your position in your career. In order to reach this goal of passing the JS-Dev-101 exam, you need more external assistance to help yourself. You are lucky to click into this link for we are the most popular vendor in the market. We have engaged in this career for more than ten years and with our JS-Dev-101 Exam Questions, you will not only get aid to gain your dreaming Salesforce certification, but also you can enjoy the first-class service online.

Unlimited JS-Dev-101 Exam Practice: https://www.troytecdumps.com/JS-Dev-101-troytec-exam-dumps.html

BONUS!!! Download part of TroytecDumps JS-Dev-101 dumps for free: https://drive.google.com/open?id=1ag724Tztlm3PDnPrEJpcJ0UwjytB16wM

Report this wiki page