2023 Latest 100% Exam Passing Ratio – JavaScript-Developer-I Dumps PDF [Q87-Q111]

NO.87 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:
Class Item {
constructor(name, price) {
… // Constructor Implementation
}
}
Class SaleItem extends Item {
constructor (name, price, discount) {
…//Constructor Implementation
}
}
There is a new requirement for a developer to implement a description method that will return a
brief description for Item and SaleItem.
Let regItem =new Item(‘Scarf’, 55);
Let saleItem = new SaleItem(‘Shirt’ 80, -1);
Item.prototype.description = function () { return ‘This is a ‘ + this.name;
console.log(regItem.description());
console.log(saleItem.description());
SaleItem.prototype.description = function () { return ‘This is a discounted ‘ +
this.name; }
console.log(regItem.description());
console.log(saleItem.description());
What is the output when executing the code above ?

NO.88 Given the code below:

Which method can be provide a visual representation of the list if users and to allow sorting by the name or email attributes.

NO.89 Refer to the code below:

Which replacement for the conditional statement on line 02 allows a developer to correctly determine that a specific element, myElement on the page had been clicked?

NO.90 Refer to the following code:

Which statement should be added to line 09 for the code to display. The truck 123AB has a weight of 5000 Ib. ‘?

NO.91 Refer to the code below:
Let textValue = ‘1984’;
Which code assignment shows a correct way to convert this string to an integer?

NO.92 Refer to the code below:

Line 05 causes an error.
What are the values of greeting and salutation once code completes?

NO.93 A developer is creating a simple webpage with a button. When a user clicks this button for the first time, a message is displayed.
The developer wrote the JavaScript code below, but something is missing. The message gets displayed every time a user clicks the button, instead of just the first time.
01 function listen(event) {
02 alert ( ‘Hey! I am John Doe’) ;
03 button.addEventListener (‘click’, listen);
Which two code lines make this code work as required?
Choose 2 answers

NO.94 Refer to code below:
console.log(0);
setTimeout(() => (
console.log(1);
});
console.log(2);
setTimeout(() => {
console.log(3);
), 0);
console.log(4);
In which sequence will the numbers be logged?

NO.95 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:

NO.96 Given the HTML below:

Which statement adds the priority-account CSS class to the Universal Containers row?

NO.97 Refer to the code below:
new Promise((resolve, reject) => {
const fraction = Math.random();
if( fraction >0.5) reject(“fraction > 0.5, ” + fraction);
resolve(fraction);
})
.then(() =>console.log(“resolved”))
.catch((error) => console.error(error))
.finally(() => console.log(” when am I called?”));

When does Promise.finally on line 08 get called?

NO.98 Which code statement below correctly persists an objects in local Storage ?

NO.99 Refer to the string below.
Const str=’Salesforce’;
Which two statements results in the word ‘Sales’?

NO.100 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 and Option B?

NO.101 Universal Containers (UC) notices that its application that allows users to search for
accounts makes a network request each time a key is pressed. This results in too many
requests for the server to handle.
● Address this problem, UC decides to implement a debounce function on string change
handler.
What are three key steps to implement this debounce function?
Choose 3 answers:

NO.102 Given the requirement to refactor the code above to JavaScript class format, which class
definition is correct?

A)

B)

C)

D)

NO.103 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?

NO.104 Refer to the code below:
01 const exec = (item, delay) =>{
02 new Promise(resolve => setTimeout( () => resolve(item), delay)),
03 async function runParallel() {
04 Const (result1, result2, result3) = await Promise.all{
05 [exec (‘x’, ‘100’) , exec(‘y’, 500), exec(‘z’, ‘100’)]
06 );
07 return `parallel is done: $(result1) $(result2)$(result3)`;
08 }
}
}
Which two statements correctly execute the runParallel () function?
Choose 2 answers

NO.105 Refer to the code:

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

NO.106 Refer to the code below:
Let foodMenu1 = [‘pizza’, ‘burger’, ‘French fries’];
Let finalMenu = foodMenu1;
finalMenu.push(‘Garlic bread’);
What is the value of foodMenu1 after the code executes?

NO.107 Refer to the expression below:
Let x = (‘1’ + 2) == (6 * 2);
How should this expression be modified to ensure that evaluates to false?

NO.108 Universal Containers recently launched its new landing page to host a crowd-funding
campaign. The page uses an external library to display some third-party ads. Once the page is
fully loaded, it creates more than 50 new HTML items placed randomly inside the DOM, like the
one in the code below:

All the elements includes the same ad-library-item class, They are hidden by default, and they are randomly displayed while the user navigates through the page.

NO.109 Which statement parses successfully?

NO.110 A developer writes the code below to calculate the factorial of a given number.

What is the result of executing line 04?

NO.111 Which statement accurately describes the behaviour of the async/ await keyworks ?