JS-Dev-101최고품질덤프문제모음집 - JS-Dev-101시험문제집

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Salesforce JS-Dev-101 시험요강:

주제	소개
주제 1	Asynchronous Programming: Covers asynchronous programming concepts and understanding how the event loop controls execution flow and determines outcomes.
주제 2	Debugging and Error Handling: Covers proper error handling techniques and the use of the console and breakpoints to debug code.
주제 3	Testing: Covers evaluating unit test effectiveness against a block of code and modifying tests to improve their coverage and reliability.
주제 4	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.
주제 5	Server Side JavaScript: Covers Node.js implementations, CLI commands, core modules, and package management solutions for given scenarios.

>> JS-Dev-101최고품질 덤프문제모음집 <<

JS-Dev-101최고품질 덤프문제모음집 시험 최신버전 자료

Salesforce인증 JS-Dev-101시험은 IT업종종사분들에게 널리 알려진 유명한 자격증을 취득할수 있는 시험과목입니다. Salesforce인증 JS-Dev-101시험은 영어로 출제되는만큼 시험난이도가 많이 높습니다.하지만 PassTIP의Salesforce인증 JS-Dev-101덤프만 있다면 아무리 어려운 시험도 쉬워집니다. 오르지 못할 산도 정복할수 있는게PassTIP제품의 우점입니다. PassTIP의Salesforce인증 JS-Dev-101덤프로 시험을 패스하여 자격증을 취득하면 정상에 오를수 있습니다.

최신 Salesforce Developers JS-Dev-101 무료샘플문제 (Q66-Q71):

질문 # 66
Given two expressions var1 and var2. What are two valid ways to return the logical AND of the two expressions and ensure it is data type Boolean ?
Choose 2 answers:

A. var1 && var2
B. Boolean(var1) && Boolean(var2)
C. Boolean(var1 && var2)
D. var1.toBoolean() && var2toBoolean()

정답：B,C

질문 # 67
Refer to the HTML below:
<div id="main">
<ul>
<li>Leo</li>
<li>Tony</li>
<li>Tiger</li>
</ul>
</div>
Which JavaScript statement results in changing "Leo" to "The Lion"?

A. document.querySelectorAll('#main #Leo').innerHTML = 'The Lion';
B. document.querySelectorAll('#main li,Leo').innerHTML = 'The Lion';
C. document.querySelector('#main li:nth-child(1)').innerHTML = 'The Lion';
D. document.querySelector('#main li:second-child').innerHTML = 'The Lion';

정답：C

설명：
We want to select the first <li> under #main and change its content.
document.querySelector(selector) returns the first element matching the CSS selector.
In the DOM, the <li> elements under <ul> are children in order:
1st child: "Leo"
2nd child: "Tony"
3rd child: "Tiger"
li:nth-child(1) is the CSS pseudo-class that selects the first <li> inside its parent.
So:
document.querySelector('#main li:nth-child(1)').innerHTML = 'The Lion'; selects the first <li> ("Leo") inside #main and sets its innerHTML to "The Lion".
Why others are incorrect:
A . #main #Leo
There is no element with id "Leo". id is not set on the <li>, so the selector matches nothing.
B . li:second-child
There is no :second-child pseudo-class. The valid pseudo-class is :nth-child(2); and that would select "Tony", not "Leo".
C . '#main li,Leo'
This selector means "all #main li and all elements named <Leo>".
There is no <Leo> tag, and querySelectorAll returns a NodeList, which does not have a single innerHTML property.
Therefore, D is the correct statement.
Study Guide Concepts:
document.querySelector vs querySelectorAll
CSS selectors: nth-child()
DOM element innerHTML property

질문 # 68
A developer is leading the creation of a new web server for their team that will fulfill API requests from an existing client. The team wants a web server that runs on Node.js, and they want to use the new web framework Minimalist.js. The lead developer wants to advocate for a more seasoned back-end framework that already has a community around it.
Which two frameworks could the lead developer advocate for?

A. Next
B. Gatsby
C. Angular
D. Next.js

정답：A,D

설명：
The question is about:
Web frameworks that run on Node.js
Used to build servers and APIs
With established communities.
From the given options:
Angular:
A front-end framework running in the browser, not a Node.js server framework.
Gatsby:
A React-based static site generator; uses Node tooling but is not primarily a Node server framework.
Next / Next.js:
Server-side rendering / full-stack frameworks built on Node.js and React.
Used to create both server-rendered pages and APIs.
They have active communities and are "seasoned" compared to a hypothetical Minimalist.js.
Although typical Node back-end frameworks would include Express.js, Koa, or NestJS, given the options provided, the best fits for server-side frameworks with Node.js and an ecosystem are:
Next (interpreted as Next.js)
Next.js
Thus, the correct pair from the list is B and D.
Concepts: Node.js web frameworks, server-side rendering, community-backed frameworks vs minimal/new frameworks.

질문 # 69
Given the expressionsvar1 and var2, what are two valid ways to return the concatenation of the two expressions and ensure it is string? Choose 2 answers

A. string.concat (var1 +var2)
B. var1.toString ( ) var2.toString ( )
C. String (var1) .concat (var2)
D. var1 + var2

정답：A,B

질문 # 70
A developer publishes a new version of a package with bug fixes but no breaking changes. The old version number was 2.1.1.
What should the new package version number be based on semantic versioning?

A. 2.1.2
B. 2.2.1
C. 2.2.0
D. 3.1.1

정답：A

설명：
Semantic versioning: MAJOR.MINOR.PATCH
MAJOR: incompatible API changes.
MINOR: add functionality in a backward compatible manner.
PATCH: backward compatible bug fixes.
Here:
Bug fixes only, no breaking changes → increment PATCH.
From 2.1.1 to 2.1.2.
So the correct new version is 2.1.2.

질문 # 71
......

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JS-Dev-101시험문제집: https://www.passtip.net/JS-Dev-101-pass-exam.html

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