Download Free Salesforce JavaScript-Developer-I Exam Questions & Answer [Q45-Q62]

Q45. 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

Q46. A developer is debugging a web server that uses Node.js The server hits a runtimeerror
every third request to an important endpoint on the web server.
The developer added a break point to the start script, that is at index.js at he root of the
server’s source code. The developer wants to make use of chrome DevTools to debug.
Which command can be run to access DevTools and make sure the breakdown is hit ?

Q47. The developer has a function that prints “Hello” to an input name. To test this, thedeveloper created a function that returns “World”. However the following snippet does not print ” Hello World”.

What can the developer do to change the code to print “Hello World” ?

Q48. Refer to the code below:

What value can a developer expect when referencing o,js,secondCity?

Q49. Given HTML below:
<div>
<div id =”row-uc”> Universal Container</div>
<div id =”row-aa”>Applied Shipping</div>
<div id =”row-bt”> Burlington Textiles </div>
</div>
Which statement adds the priority = account CSS class to the universal Containers row ?

Q50. Refer to the HTML below:
<div id=”main”>
<ul>
<li>Leo</li>
<li>Tony</li>
<li>Tiger</li>
</ul>
</div>
Which JavaScript statement results in changing ” Tony” to “Mr. T.”?

Q51. Refer to the code:

Given the code above, which three properties are set for pet1? Choose 3 answers

Q52. Refer to the code below:

Considering that JavaScript is single-threaded, what is the output of line 08 after the code executes?

Q53. A developer is wondering whether to use, promise, then or provise, catch especially when a promise throws an error.
Which two promises are rejected? Choose 2 answers

Q54. A developer has two ways to write a function:
Option A:
function Monster() {
This.growl = () => {
Console.log (“Grr!”);
}
}
Option B:
function Monster() {};
Monster.prototype.growl =() => {
console.log(“Grr!”);
}
After deciding on an option, the developer creates 1000 monster objects.
How many growl methods are created with Option A Option B?

Q55. Refer the following code

what is the value of array after code executes?

Q56. Given the following code:
Let x =null;
console.log(typeof x);
What is the output of the line 02?

Q57. Given the requirement to refactor the code above to JavaScript class format, which class definition is correct?

Q58. Refer to the code declarations below:

Which three expressions return the string JavaScript?
Choose 3 answers

Q59. Refer the code below.
x=3.14;
function myfunction() {
“use strict”;
y=x;
}
z=x;
myFunction();

Q60. A class was written to represent items for purchase in an online store, and a second class representing items that are on sale at a discounted price. The constructor sets the name to the first value passed in. The pseudocode is below:

There is a new requirement for a developer to implement a description method that will retrun a brief description for item and saleitem.

What is the out when executing the code above?

Q61. Refer to the code below:

What is the output after the ode executes successfully?

Q62. The developer has a function that prints “Hello” to an input name. To test this, thedeveloper created a function that returns “World”. However the following snippet does not print ” Hello World”.

What can the developer do to change the code to print “Hello World” ?