Effective Salesforce JavaScript-Developer-I Exam Preparation In a Short Time

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When it comes to negotiating your salary with reputed tech firms, you could feel entirely helpless if you're a fresh graduate or don't have enough experience. You will have no trouble landing a well-paid job in a reputed company if you have Salesforce JavaScript-Developer-I Certification on your resume. Success in the test is also a stepping stone to climbing the career ladder. If you are determined enough, you can get top positions in your firm with the Salesforce JavaScript-Developer-I certification.

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Once certified, developers can showcase their skills and expertise in JavaScript development on the Salesforce platform. Salesforce Certified JavaScript Developer (JS-Dev-101) certification can help developers stand out in the job market and increase their earning potential. It can also help them gain access to new job opportunities and career advancement opportunities within their organization.

Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q129-Q134):

NEW QUESTION # 129
A developer at Universal Containers is creating their new landing page basedon HTML, CSS, and JavaScript.
To ensure that visitors have a good experience, a script named personalizeWebsiteContent needs to be executed when the webpage is fully loaded (HTML content and all related files), in order to do some custom initializations.
Which implementation should be used to call Fe:s:-a;::eHec5;te::.-.ter.: based on the business requirement above?

Answer: C


NEW QUESTION # 130
let sampleText = " The quick brown fox jumps " ;
Which three expressions return true for a substring?

Answer: A,D,E

Explanation:
The correct answers are A, B, and C .
The original variable name appears to contain a typing error. The variable should be used consistently as sampleText:
let sampleText = " The quick brown fox jumps " ;
A is correct because includes() checks whether a string contains a specific substring and returns a Boolean value:
sampleText.includes( ' fox ' );
Since " fox " exists inside " The quick brown fox jumps " , this returns:
true
B is correct after correcting the typing error. The correct expression is:
sampleText.indexOf( ' quick ' ) > -1;
indexOf() returns the index position where the substring is found. If the substring is not found, it returns -1.
Since " quick " exists in the string, sampleText.indexOf( ' quick ' ) returns a value greater than -1, so the expression returns:
true
C is correct after correcting the missing quotation marks and adding a Boolean comparison:
sampleText.indexOf( ' fox ' ) !== -1;
The substring " fox " exists in the string, so indexOf( ' fox ' ) does not return -1. Therefore, the expression returns:
true
D is incorrect because the method name is typed incorrectly. JavaScript string has includes(), not include().
Incorrect:
sampleText.include( ' fox ' )
Correct:
sampleText.includes( ' fox ' )
E is incorrect because JavaScript string matching is case-sensitive:
sampleText.indexOf( ' Quick ' ) !== -1;
The string contains " quick " with a lowercase q, not " Quick " with an uppercase Q, so this returns:
false
Therefore, the verified answers are A, B, and C .


NEW QUESTION # 131
Given the following code:

is the output of line 02?

Answer: D


NEW QUESTION # 132
Refer to the following code:

Which statement should be added to line 09 for the code to display. The boat has a capacity of 10 people?

Answer: C


NEW QUESTION # 133
Which actions can be done using the JavaScript browser console?

Answer: C

Explanation:
The correct answer is B because the JavaScript browser console allows developers to interact with the current web page using JavaScript commands. Through the console, you can access the document object, inspect DOM elements, read their properties, and modify the structure or content of the page.
For example:
document.body.style.backgroundColor = " lightblue " ;
This changes the page's background color.
Another example:
document.querySelector( " h1 " ).textContent = " Updated Heading " ;
This changes the text of the first < h1 > element on the page.
The DOM , or Document Object Model, is the browser's JavaScript representation of the HTML page. Since the console runs JavaScript in the context of the current page, it can be used to inspect and modify DOM elements directly.
Why the other options are incorrect:
A is not the best answer because although you can type general JavaScript expressions in the console, the browser console is mainly connected to the current page's execution environment. The question is asking about practical browser-console actions related to a page.
C is incorrect because performance reports are usually generated through tools such as the Performance panel or Lighthouse in browser developer tools, not directly through the JavaScript console.
D is incorrect because the console can modify the DOM and runtime values, but it does not permanently change the original JavaScript source code of the page. Any changes made through the console are temporary and disappear when the page reloads.
E is incorrect because security-protected cookies, such as HttpOnly cookies, cannot be viewed or changed using JavaScript. This is an intentional browser security feature that prevents client-side scripts from accessing sensitive cookie data.
Therefore, the best verified answer is B .


NEW QUESTION # 134
......

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