A developer implements and calls the following code when an application state change occurs: Const onStateChange =innerPageState) => {
window.history.pushState(newPageState, ‘ ’, null);
}
If the back button is clicked after this method is executed, what can a developer expect?

1. A. A navigate event is fired with a state property that details the previous application state.
2. B. The page is navigated away from and the previous page in the browser’s history is loaded.
3. C. The page reloads and all Javascript is reinitialized.
4. D. A popstate event is fired with a state property that details the application’s last state.

Correct Answer: B

Refer to HTML below:

1. A. document.getElementById(‘ card-01 ’).getBoundingClientRest().width
2. B. document.getElementById(‘ card-01 ’).style.width
3. C. document.getElementById(‘ card-01 ’).width
4. D. document.getElementById(‘ card-01 ’).innerHTML.lenght*e

Correct Answer: A

Refer to the code below:
Const resolveAfterMilliseconds = (ms) => Promise.resolve ( setTimeout (( => console.log(ms), ms ));
Const aPromise = await resolveAfterMilliseconds(500); Const bPromise = await resolveAfterMilliseconds(500); Await aPromise, wait bPromise;
What is the result of runningline 05?

1. A. aPromise and bPromise run sequentially.
2. B. Neither aPromise or bPromise runs.
3. C. aPromise and bPromise run in parallel.
4. D. Only aPromise runs.

Correct Answer: B

Refer to the code:

Given the requirement to refactor the code above to JavaScript class format, which class definition is correct?
A)

B)

C)

D)

1. A.

Correct Answer: B

A developer has the following array of student test grades: Let arr = [ 7, 8, 5, 8, 9 ];
The Teacher wants to double each score and then see an array of the students who scored more than 15 points.
How should thedeveloper implement the request?

1. A. Let arr1 = arr.filter(( val) => ( return val > 15 )) .map (( num) => ( return num *2 ))
2. B. Let arr1 = arr.mapBy (( num) => ( return num *2 )) .filterBy (( val ) => return val > 15 )) ;
3. C. Let arr1 = arr.map((num) => num*2). Filter (( val) => val > 15);
4. D. Let arr1 = arr.map((num) => ( num *2)).filterBy((val) => ( val >15 ));

Correct Answer: C