Question 1

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:

Accepted Answer

Correct answer: D

Question 2

A developer at Universal Containers creates a new landing page based on HTML, CSS, and JavaScript TO ensure that visitors have a good experience, a script
named personaliseContext needs to be executed when the webpage is fully loaded (HTML content and all related files ), in order to do some custom initialization.
Which statement should beused to call personalizeWebsiteContent based on the above business requirement?

Accepted Answer

Correct answer: B

Question 3

A developer wants to use a try...catch statement to catch any error that countSheep () may throw and pass it to a handleError () function.
What is the correct implementation of the try...catch?
A)
B)
C)
D)

Accepted Answer

Correct answer: A

Question 4

Refer to code below:
Function muFunction(reassign){
Let x = 1;
var y = 1;
if( reassign ) {
Let x= 2;

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Var y = 2;
console.log(x);
console.log(y);}
console.log(x);
console.log(y);}
What isdisplayed when myFunction(true) is called?

Accepted Answer

Correct answer: C

Question 5

Which three browser specific APIs are available for developers to persist data between page loads ? Choose 3 answers

Accepted Answer

Correct answer: ABE

Question 6

developer is trying to convince management that their team will benefit from using
Node.js for a backend server that they are going to create. The server will be a web server that handles API requests from a website that the team has already
built using HTML, CSS, and JavaScript.
Which three benefits of Node.js can the developer use to persuade their manager? Choose 3 answers:

Accepted Answer

Correct answer: ACE

Question 7

A Developer wrote the following code to test a sum3 function that takes in an array of numbers and returns the sum of the first three number in the array, The test
passes:
A different developer made changes to the behavior of sum3 to instead sum all of the numbers present in the array. The test passes:
Which two results occur when running the test on the updated sum3 function ? Choose 2 answers

Accepted Answer

Correct answer: AD

Question 8

Refer to the code below:
const event = new CustomEvent(
//Missing Code
);
obj.dispatchEvent(event);
A developer needs to dispatch a custom event called update to send information about recordId.
Which two options could a developer insert at the placeholder in line 02 to achieve this? Choose 2 answers

Accepted Answer

Correct answer: AD

Question 9

Refer to the code below:
Let car1 = new Promise((_ , reject) => setTimeout(reject, 2000, “car 1 crashed in” =>
Let car2 =new Promise(resolve => setTimeout(resolve, 1500, “car 2 completed”) Let car3 =new Promise(resolve => setTimeout(resolve, 3000, “car 3 completed”)
Promise.race(( car1, car2, car3))
.t hen (value => (
Let result = ‘$(value) the race.’;)}
.catch(arr => {
console.log(“Race is cancelled.”, err);

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});
What isthe value of result when Promise.race executes?

Accepted Answer

Correct answer: B

Question 10

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

Accepted Answer

Correct answer: A