Which javascript methods can be used to serialize an object into a string and deserialize a JSON string into an object, respectively?

• A.JSON.encode and JSON.decode
• B.JSON.parse and JSON.deserialize
• C.JSON.serialize and JSON.deserialize
• D.JSON.stringify and JSON.parse

Comment: *

Name: *

Email: *

Verification: *

Refer to the following array:
Let arr1 = [ 1, 2, 3, 4, 5 ];

Which two lines of code result in a second array, arr2 being created such that arr2 is not a reference to arr1?

• A.Let arr2 = arr1;
• B.Let arr2 = Array.from(arr1);
• C.Let arr2 = arr1.slice(0, 5);
• D.Let arr2 = arr1.sort();

Comment: *

Name: *

Email: *

Verification: *

Refer to the code below:

Which code executes syhello once, two minutes from now?

• A.SetInterval (sayhello, 120000) ;
• B.SetTimeout (sayhello( ), 120000) ;
• C.SetTimeout (sayhello, 120000) ;
• D.delay (sayhello, 120000) ;

Comment: *

Name: *

Email: *

Verification: *

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 ').style.width
• B.document.getElementById(' card-01 ').innerHTML.lenght*e
• C.document.getElementById(' card-01 ').width
• D.document.getElementById(' card-01 ').getBoundingClientRest().width

Comment: *

Name: *

Email: *

Verification: *

Universal Container(UC) just launched a new landing page, but users complain that the
website is slow. A developer found some functions that cause this problem. To verify this, the
developer decides to do everything and log the time each of these three suspicious functions
consumes.
console.time('Performance');
maybeAHeavyFunction();
thisCouldTakeTooLong();
orMaybeThisOne();
console.endTime('Performance');
Which function can the developer use to obtain the time spent by every one of the three
functions?

• A.console.getTime()
• B.console.timeStamp()
• C.console.timeLog()
• D.console.trace()

Comment: *

Name: *

Email: *

Verification: *