Online Access Free JavaScript-Developer-I Exam Questions

No.# The function should be called inside try block, right after handleObjectValue.

No.# B is correct, D is wrong because try catch handles only errors thrown from synchronous execution.

No.# Correct Answer is : A, B & D.
E is not correct because it is misleading, a pending promise can become fulfilled or rejected, both of these states are categorized as settled. So settled is not a state different than fulfilled or rejected.

No.# C

async Keyword: The primary purpose of the async keyword is to declare that a function will handle asynchronous operations. A direct consequence of this is that the function is guaranteed to return a Promise. If you explicitly return a value from an async function (e.g., return 42), that value will be automatically wrapped in a resolved promise (Promise.resolve(42)).

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No.# The correct answer is A. A popstate event is fired with a state property that details the application's last state.

When window.history.pushState() is used to add entries to the browser's history:

It creates a new history entry without reloading the page
When the user clicks the back button, the browser:
Moves back one step in the history stack
Fires a popstate event
The event object contains a state property with the state data from the previous entry
Example of handling this:

JavaScript

window.addEventListener('popstate', (event) => {
if (event.state) {
// Restore application to the state stored in event.state
updateUI(event.state);
}
});
The other options are incorrect because:

The page doesn't reload (option B)
There's no standard "navigate" event in this context (option C)
The page isn't navigated away from - navigation happens within the single-page context (option D)

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No.# correct ans should be : document.querySelector('#main li:nth-child(2)').innerHTML = "The Lion.";

No.# Document .querySelector(‘#row-uc’).classList.add(‘priority-account’);

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No.# Correct Ans is A

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No.# answer is A, B

No.# B is correct. 1.3.5 is the latest version in 1.3

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No.# The correct answer is:

B. ws.on('connect', () => { console.log('connected to client'); }); ws.on('error', (error) => { console.log('ERROR', error); });

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No.# Answer will be C here.
~1.3.0: The tilde symbol (~) means npm installs the latest patch version within the specified minor version. In this case, 1.3.1 would be installed because it's the highest patch version for 1.3.