JavaScript-Developer-I Practice Test

Refer to HTML below:
<div id =”main”>
<div id = “ card-00”>This card is smaller.</div>
<div id = “card-01”>The width and height of this card is determined by its
contents.</div>
</div>
Which expression outputs the screen width of the element with the ID card-01?

A.

document.getElementById(‘ card-01 ’).getBoundingClientRest().width

B.

document.getElementById(‘ card-01 ’).style.width

C.

document.getElementById(‘ card-01 ’).width

D.

document.getElementById(‘ card-01 ’).innerHTML.lenght*e

Which option is a core Node,js module?

A.

Path

B.

Ios

C.

Memory

D.

locate

A developer is wondering whether to use, Promise.then or Promise.catch, especially
when a Promise throws an error?
Which two promises are rejected?
Which 2 are correct?

A.

Promise.reject(‘cool error here’).then(error => console.error(error));

B.

Promise.reject(‘cool error here’).catch(error => console.error(error));

C.

New Promise((resolve, reject) => (throw ‘cool error here’}).catch(error =>
console.error(error)) ;

D.

New Promise(() => (throw ‘cool error here’}).then(null, error => console.error(error)));

Refer to the code below:
Let str = ‘javascript’;
Str[0] = ‘J’;
Str[4] = ’S’;
After changing the string index values, the value of str is ‘javascript’. What is the reason
for this value:

A.

A. Non-primitive values are mutable.

B.

Non-primitive values are immutable.

C.

Primitive values are mutable.

D.

Primitive values are immutable.

Which three actions can be using the JavaScript browser console?
Choose 3 answers:

A.

View and change DOM the page.

B.

Display a report showing the performance of a page.

C.

Run code that is not related to page.

D.

view , change, and debug the JavaScript code of the page.

E.

View and change security cookies