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Salesforce JavaScript-Developer-I certification exam is a multiple-choice exam that consists of 60 questions. Candidates have 105 minutes to complete the exam, and they must achieve a passing score of 68% to earn the certification. JavaScript-Developer-I Exam can be taken online or in person at a testing center.
NEW QUESTION # 110
A developer wants to use a try...catch statement to catch any error that countSheep () may throw and pass it to a handleError () function.
What is the correct implementation of the try...catch?
A)
B)
C)
D)
Answer: D
NEW QUESTION # 111
A developer needs the function personalizeWebsiteContent to run when the webpage is fully loaded (HTML and all external resources).
Which implementation should be used?
Answer: C
Explanation:
JavaScript defines two main page-loading events:
* DOMContentLoaded Fires when the HTML document has been completely parsed. External resources like images, stylesheets, iframe contents, etc. may not be loaded yet .
* load event on window Fires when:
* HTML is fully parsed
* All dependent resources (images, scripts, CSS, fonts, etc.) are fully loaded The requirement states:
"when the webpage is fully loaded (HTML content and all related files )" This aligns exactly with the window load event .
Implementation:
window.addEventListener( " load " , personalizeWebsiteContent);
This matches option B.
JavaScript knowledge references (text-only)
* DOMContentLoaded fires after HTML parsing only.
* load fires after all page resources finish loading.
* The window object is the correct target for listening to the full load event.
NEW QUESTION # 112
A developer wants to create an object from a function in the browser using the code below.
What happens due to lack of the new keyword on line 02?
Answer: D
NEW QUESTION # 113
Refer to the code below:
Async funct on functionUnderTest(isOK) {
If (isOK) return 'OK' ;
Throw new Error('not OK');
)
Which assertion accurately tests the above code?
Answer: D
NEW QUESTION # 114
Consider type coercion, what does the following expression evaluate to?
True + 3 + '100' + null
Answer: C
NEW QUESTION # 115
......
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