Die seit kurzem aktuellsten Salesforce Certified JavaScript Developer - Multiple Choice Prüfungsunterlagen, 100% Garantie für Ihen Erfolg in der Salesforce JS-Dev-101 Prüfungen!

BONUS!!! Laden Sie die vollständige Version der Zertpruefung JS-Dev-101 Prüfungsfragen kostenlos herunter: https://drive.google.com/open?id=1azZ5tKRfNGFkKZX1BuZl4MPP2hXE0e_m

In vielen Situationen erwerben wir noch keine zufriedenstellende Wirkung, wenn wir viel Geld und Zeit ausgeben. Die richtige Methode spielt eine entscheidende Rolle. Wir Zertpruefung Team widmet sich, die beste Methode für Sie zu entwickeln, Salesforce JS-Dev-101 Prüfung zu bestehen. Von dem Punkt, wenn Sie unsere Salesforce JS-Dev-101 Prüfungsunterlagen auswählen, bieten wir Ihnen umfassende Garantien. Kostenlose Probe vor dem Kauf, Bezahlungssicherheit beim Kauf, einjährige kostenlose Aktualisierung nach dem Kauf der Salesforce JS-Dev-101 Unterlagen und die volle Rückerstattung für den Durchfall der Salesforce JS-Dev-101 Prüfung usw. Alle zusammen sind unsere Expression der Garantie für die Interesse der Kunden.

Salesforce JS-Dev-101 Exam Overview:

Certification Vendor:	Salesforce
Exam Name:	Salesforce Certified JavaScript Developer - Multiple Choice
Exam Number:	JS-Dev-101
Certificate Validity Period:	Does not expire; requires maintenance updates
Exam Format:	Multiple choice, Multiple select
Real Exam Qty:	60 scored + up to 5 unscored
Available Languages:	English, Japanese
Exam Price:	USD 200
Passing Score:	65%
Related Certifications:	Salesforce Certified Platform Developer I Salesforce Certified Developer
Exam Duration:	105 minutes
Recommended Training:	Trailhead JavaScript Developer I Certification Prep
Exam Registration:	Salesforce Certification Registration
Sample Questions:	Salesforce JS-Dev-101 Sample Questions
Exam Way:	Online proctored or onsite at authorized testing centers
Pre Condition:	No formal prerequisites; recommended: strong JavaScript fundamentals, ES6+ experience, web development familiarity
Official Syllabus URL:	https://trailheadacademy.salesforce.com/certificate/exam-javascript-dev---JS-Dev-101

>> JS-Dev-101 Simulationsfragen <<

JS-Dev-101 Schulungsunterlagen - JS-Dev-101 Exam Fragen

Nun ist eine Gesellschaft, die mit den fähigen Leuten überschwemmt. Aber viele Fachleute fehlen trotzdem doch. Beispielsweise fehlen in der IT-Branche Techniker. Und die Salesforce JS-Dev-101 Zertifizierungsprüfung sit eine Prüfung, die IT-Technik testet. Zertpruefung ist eine Website, die Ihnen Kenntnise zur Salesforce JS-Dev-101 Zertifizierungsprüfung liefert.

Salesforce JS-Dev-101 Prüfungsplan:

Thema	Einzelheiten
Thema 1	Server Side JavaScript: Covers Node.js implementations, CLI commands, core modules, and package management solutions for given scenarios.
Thema 2	Browser and Events: Covers DOM manipulation, event handling and propagation, browser-specific APIs, and using Browser Developer Tools to inspect code behavior.
Thema 3	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.
Thema 4	Variables, Types, and Collections: Covers declaring and initializing variables, working with strings, numbers, dates, arrays, and JSON, along with understanding type coercion and truthy falsy evaluations.
Thema 5	Testing: Covers evaluating unit test effectiveness against a block of code and modifying tests to improve their coverage and reliability.
Thema 6	Debugging and Error Handling: Covers proper error handling techniques and the use of the console and breakpoints to debug code.

Salesforce Certified JavaScript Developer - Multiple Choice JS-Dev-101 Prüfungsfragen mit Lösungen (Q25-Q30):

25. Frage
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?

A. 'visible' : 'hidden'
B. 'block' : 'none'
C. 'none' : 'block'
D. 'hidden' : 'visible'

Antwort: B

Begründung:
We have a ternary:
account.style.display = accountName.includes(parsedSearchString)
? /* if true */
/* if false */;
Requirement:
If the account matches the search string → show it.
If it does not match → 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.

26. Frage
A Node.js server library uses events and callbacks. The developer wants to log any issues the server has at boot time.
Which code logs an error with an event?

A. server.error('error) => {
console.log('ERROR', error);
});
B. try {
server.start();
} catch(error) {
C. server.catch('error) => {
console.log('ERROR', error);
});
D. server.on('error', (error) => {
console.log('ERROR', error);
});

Antwort: D

Begründung:
console.log('ERROR', error);
}
Explanation:
Node.js event-based modules use the EventEmitter pattern.
The correct syntax for listening to events is:
emitter.on('eventName', callback)
The server library emits an 'error' event, which must be listened to using .on.
Option analysis:
A: .catch is for Promises, not EventEmitters.
B: .error is not an EventEmitter method.
C: Correct. Listens to the 'error' event.
D: try...catch only captures synchronous errors, not event-based asynchronous errors.
Therefore, the correct answer is option C.
JavaScript Knowledge Reference (text-only)
The EventEmitter API uses on(event, handler) to listen for events.
Errors emitted asynchronously cannot be caught with try...catch.
The 'error' event is standard for Node.js modules to signal operational errors.

27. Frage
Considering type coercion, what does the following expression evaluate to?
true + '13' + NaN

A. '113NaN'
B. 'true13NaN'
C. 0
D. 'true13'

Antwort: B

Begründung:
Comprehensive and Detailed Explanation From Exact Extract JavaScript Knowledge:
Expression:
true + '13' + NaN
The + operator is left-associative, so evaluation order:
true + '13'
When one operand is a string, + performs string concatenation.
true is converted to string 'true'.
'true' + '13' → 'true13'.
Result from step 1 with NaN:
'true13' + NaN
Again, one operand is a string, so concatenation.
NaN is converted to string 'NaN'.
'true13' + 'NaN' → 'true13NaN'.
Final value: 'true13NaN'.
So A is correct.
Why others are wrong:
B: '113NaN' would require true to coerce to 1 first and no string to be present, which is not the case because '13' forces string concatenation.
C: 14 would require pure numeric addition, which is not the case once a string is involved.
D: 'true13' ignores the final + NaN part.
Concepts: type coercion with +, boolean to string, NaN to string, left-associative evaluation.
________________________________________

28. Frage
A developer initiates a server with the file server,js and adds dependencies in the source codes package,json that are required to run the server.
Which command should the developer run to start the server locally?

A. start server,js
B. npm start
C. npm start server,js
D. node start

Antwort: B

29. Frage
Universal Containers (UC) just launched a new landing page, but users complain that the website is slow. A developer found some functions that might cause this problem. To verify this, the developer decides to execute everything and log the time each of these three suspicious functions consumes.
01 console.time('Performance');
02
03 maybeAHeavyFunction();
04
05 thisCouldTakeTooLong();
06
07 orMaybeThisOne();
08
09 console.endTime('Performance');
Which function can the developer use to obtain the time spent by every one of the three functions?

A. console.trace()
B. console.getTime()
C. console.timeLog()
D. console.timeStamp()

Antwort: C

Begründung:
JavaScript consoles (browsers and Node) provide timing utilities:
console.time(label) - starts a timer with the given label.
console.timeEnd(label) - stops the timer and logs the total elapsed time.
console.timeLog(label) - logs the current elapsed time without stopping the timer.
To measure the time taken by each function separately while still using a single overall timer, you can log intermediate times:
console.time('Performance');
maybeAHeavyFunction();
console.timeLog('Performance', 'after maybeAHeavyFunction');
thisCouldTakeTooLong();
console.timeLog('Performance', 'after thisCouldTakeTooLong');
orMaybeThisOne();
console.timeLog('Performance', 'after orMaybeThisOne');
console.timeEnd('Performance');
Each console.timeLog('Performance') call prints the elapsed time since console.time('Performance') was started, so you can infer how long each function took.
Note: console.endTime in the original snippet is incorrect; the real method is console.timeEnd.
Why other options are incorrect:
B . console.trace()
Prints a stack trace, not timing information.
C . console.timeStamp()
Used with browser performance tools; it does not directly show elapsed times like timeLog or timeEnd.
D . console.getTime()
Not a standard console method.
Thus, the function that can be used to obtain timing between calls is:
Answe r: A
Study Guide Concepts:
console.time, console.timeLog, console.timeEnd
Measuring performance and intermediate timings
Standard console debugging API methods

30. Frage
......

JS-Dev-101 Schulungsunterlagen: https://www.zertpruefung.de/JS-Dev-101_exam.html

2026 Die neuesten Zertpruefung JS-Dev-101 PDF-Versionen Prüfungsfragen und JS-Dev-101 Fragen und Antworten sind kostenlos verfügbar: https://drive.google.com/open?id=1azZ5tKRfNGFkKZX1BuZl4MPP2hXE0e_m