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Free Salesforce JavaScript-Developer-I Practice Exam with Questions & Answers | Set: 7

Questions 61

Refer to the following code:

<html lang=”en”>

<body>

</body>

<script>

function displayMessage(ev) {

ev.stopPropagation();

console.log(‘Inner message.’);

}

const elem = document.getElementById(‘myButton’);

elem.addEventListener(‘click’ , displayMessage);

</script>

</html>

What will the console show when the button is clicked?

Options:
A.

Outer message

B.

Outer messageInner message

C.

Inner messageOuter message

D.

Inner message

Questions 62

JavaScript-Developer-I Question 62

Which code change should be done for the console to log the followingwhen 'Click me!' is clicked'

> Row log

> Table log

Options:
A.

Remove lines 13 and14

B.

Change line 10 to event.stopPropagation (false) ;

C.

Change line 14 to elem.addEventListener ('click', printMessage, true);

D.

Remove line 10

Questions 63

GIven a value, which three options can a developeruse to detect if thevalue is NaN?

Choose 3 answers !

Options:
A.

value == NaN

B.

Object.is(value, NaN)

C.

value === Number.NaN

D.

value ! == value

E.

Number.isNaN(value)

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