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Salesforce JavaScript-Developer-I Certification Exam consists of 60 multiple-choice questions that must be completed within 105 minutes. JavaScript-Developer-I exam focuses on a range of topics, including JavaScript fundamentals, Apex, Visualforce, and Lightning components. A passing score of 68% is required to earn the certification.

Salesforce Certified JavaScript Developer (JS-Dev-101) Sample Questions (Q95-Q100):

NEW QUESTION # 95
Refer to the code declarations below:

Which three expressions return the string JavaScript?
Choose 3 answers

A. $(str1) $ (str2} ';
B. Str1.concat (str2);
C. Str1.join (str2);
D. Str1 + str2;
E. Concat (str1, str2);

Answer: A,B,D

NEW QUESTION # 96
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?

A. this.size = size;
B. super (size);
C. super.size = size;
D. ship.size size;

Answer: A

NEW QUESTION # 97
Given the requirement to refactor the code above to JavaScript class format, which class
definition is correct?

A)

B)

C)

D)

A. Option B
B. Option C
C. Option A
D. Option D

Answer: C

NEW QUESTION # 98
Given the HTML below:

Which statement adds the priority-account css class to the Applied Shipping row?

Answer:

Explanation:
document.querySelector('#row-as').classList.add('priority-account');

NEW QUESTION # 99
Refer to the code below:
< html >
< body >
< div id= " logo " > Hello Logo! < /div >
< button id= " test " > Click me < /button >
< /body >
< script >
function printMessage(event) {
console.log( ' This is a test message ' );
}
let el = document.getElementById( ' test ' );
el.addEventListener( " click " , printMessage, false);
< /script >
< /html >
Which action should be done?

A. Add event.stopPropagation(); to window.onload event handler
B. Add event.stopPropagation(); to printMessage function
C. Add event.removeEventListener(); to printMessage function
D. Add event.removeEventListener(); to window.onload event handler

Answer: B

Explanation:
The correct answer is C .
The typing errors in the options should be corrected as follows:
event.stopPropagation();
The stopPropagation() method is used to stop an event from continuing through the DOM event propagation path.
A click event normally goes through these phases:
Capturing phase # Target phase # Bubbling phase
Because the event listener is attached to the button:
el.addEventListener( " click " , printMessage, false);
the function printMessage receives the click event when the button is clicked. To stop the event from bubbling up to parent elements, the event object should be accepted as a parameter and stopPropagation() should be called inside the event handler.
Corrected code:
< html >
< body >
< div id= " logo " > Hello Logo! < /div >
< button id= " test " > Click me < /button >
< /body >
< script >
function printMessage(event) {
event.stopPropagation();
console.log( ' This is a test message ' );
}
let el = document.getElementById( ' test ' );
el.addEventListener( " click " , printMessage, false);
< /script >
< /html >
Why this is correct:
event.stopPropagation();
prevents the click event from moving upward to ancestor elements after the button's handler runs.
Why the other options are incorrect:
A and B are incorrect because removeEventListener() is used to remove a previously registered event listener.
It does not stop event bubbling for the current event.
D is incorrect because stopPropagation() should be called inside the active event handler that receives the event object. In this case, that function is:
printMessage(event)
Therefore, the verified answer is C .

NEW QUESTION # 100
......

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