Salesforce Javascript Developer I Exam Practice Test Instant Access

Question 1

Refer to the string below:

const str = 'Salesforce';

Which two statements result in the word 'Sales'?

Choose 2 answers

Astr.substr(1, 5);

Bstr.substr (0, 5);

Cstr.substring (1, 5);

Dstr.substring (0, 5);

Answer : B, D

Question 2

A developer at Universal Containers is creating their new landing page based on HTML, CSS, and JavaScript.

To ensure that visitors have a good experience, a script named personalizeWebsiteContent needs to be executed when the webpage is fully loaded (HTML content and all related files), in order to do some custom initializations.

Which implementation should be used to call Fe:s:-a;::eHec5;te::.-.ter.: based on the business requirement above?

AAdd a listener to thewindow object to handle the DOMContentLoaded event

BAdd a handler to the personalizeWebsiteContent script to handle the load event

CAdd a listener to the window object to handle the lead event

DAdd a handler to the personalizeWebsiteContent script tohandle the DOMContentLoaded event

Answer : C

Question 3

A developer tries to retrieve all cookies, then sets a certain key value pair in the cookie. These statements are used:

What is the behavior?

ACookies are read, but the key value is not set because the value is not URL encoded.

BCookies are not read because line 01 should be document, cookies, but the key value is set and all cookies are wiped.

CA Cookies are read andthe key value is set, the remaining cookies are unaffected.

DCookies are read and the key value is set, and all cookies are wiped.

Answer : C

Question 4

Refer to the code below:

What is the result when the Promise in the execute function is rejected?

AResolved1 Resolved2 Resolved3Resolved4

BRejected

CRejected Resolved

DRejected1 Rejected2 Rejected3 Rejected Rejected Rejected4

Answer : C

Question 5

Refer to the code below:

const car = {

price:100,

getPrice:function(){

return this.price;

}

};

const customCar = Object.create(car);

customCar.price = 70;

delete customCar.price;const result = customCar.getPrice();

Whatis the value of result after the code executes?

A100

Bundefined

Cnull

D70

Answer : A

Question 6

A developer at Universal Containers is creating their new landing pagebased on HTML, CSS, and JavaScript. The website includes multiple external resources that are loaded when the page is opened.

To ensure that visitors have a good experience, a script named personalizeWebsiteContent needs to be executed when the webpage isloaded and there is no need to wait for the resources to be available.

Which statement should be used to call personalizeWebsiteContent based on the above business requirement?

Awindows,addEventListener('load', personalizeWebsiteContent);

Bwindows,addEventListener('DOMContent Loaded ', personalizeWebsiteContent);

Cwindows,addEventListener('onload', personalizeWebsiteContent);

Dwindows,addEventListener('onDOMCContentLoaded', personalizeWebsiteContent);

Answer : A

Question 7

A developer is setting up a Node,js server and is creating a script at the root of the source code, index,js, that will start the server when executed. The developer declares a variable that needsthe folder location that the code executes from.

Which global variable can be used in the script?

Awindow.location

B_filename

C_dirname

Dthis.path

Answer : B

Salesforce Javascript Developer I Salesforce Certified JavaScript Developer I Exam Practice Test