Approved Salesforce JavaScript-Developer-I Dumps Online

NEW QUESTION 1
A developer receives a comment from the Tech Lead that the code given below has error:
const monthName = ‘July’; const year = 2019;
if(year === 2019) { monthName = ‘June’;
}
Which line edit should be made to make this code run?

• A. 01 let monthName =’July’;
• B. 02 let year =2019;
• C. 02 const year = 2020;
• D. 03 if (year == 2019) {

Answer: A

NEW QUESTION 2
A developer is setting up a new Node.js server with a client library that is built using events and callbacks. The library:
* Will establish aweb socket connection and handle receipt of messages to the server
* Will be imported with require, and made available with a variable called we.
The developer also wants to add error logging if a connection fails.
Given this info, which code segment shows the correct way to set up a client with two events that listen at execution time?

• A.
• B.
• C.
• D.

Answer: C

NEW QUESTION 3
Which option is a core Node,js module?

• A. Path
• B. Ios
• C. Memory
• D. locate

Answer: A

NEW QUESTION 4
Given HTML below:

Which statement adds the priority = account CSS class to the universal COntainers row ?

• A. Document.querySelector(‘#row-uc’).classes.push(‘priority-account’);
• B. Document .queryElementById(‘row-uc’).addclass(‘priority-account’);
• C. Document .querySelector(‘#row-uc’).classList.add(‘priority-account’);
• D. Document .querySelectorALL(‘#row-uc’).classList.add(‘priority-account’);

Answer: B

NEW QUESTION 5
Refer to the code below:

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

• A. Undefined
• B. ‘ new york ’
• C. ‘ New York ’
• D. An error

Answer: B

NEW QUESTION 6
Refer to the code:

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

B)

C)

D)

• A.

Answer: B

NEW QUESTION 7
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

• A. ‘Update’ , ( recordId : ‘123abc’ (
• B. ‘Update’ , ‘123abc’
• C. { type : ‘update’, recordId : ‘123abc’ }
• D. ‘Update’ , { Details : { recordId : ‘123abc’}}

Answer: AD

NEW QUESTION 8
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?

• A. When rejected
• B. When resolved and settled
• C. WHen resolved
• D. When resolved or rejected

Answer: D

NEW QUESTION 9
Which statement phrases successfully?

• A. JSON.parse ( ‘ foo ’ );
• B. JSON.parse ( “ foo ” );
• C. JSON.parse( “ ‘ foo ’ ” );
• D. JSON.parse(‘ “ foo ” ’);

Answer: D

NEW QUESTION 10
Refer to the code snippet below: Let array = [1, 2, 3, 4, 4, 5, 4, 4];
For (let i =0; i < array.length; i++) if (array[i] === 4) {
array.splice(i, 1);
}
}

What is the value of array after the code executes?

• A. [1, 2, 3, 4, 5, 4, 4]
• B. [1, 2, 3, 4, 4, 5, 4]
• C. [1, 2, 3, 5]
• D. [1, 2, 3, 4, 5, 4]

Answer: B

NEW QUESTION 11
Refer to the HTML below:
<div id=”main”>
<ul>
<li>Leo</li>
<li>Tony</li>
<li>Tiger</li>
</ul>
</div>
Which JavaScript statementresults in changing “ Tony” to “Mr. T.”?

• A. document.querySelectorAll(‘$main $TONY’).innerHTML = ’ M
• B. ’;
• C. document.querySelector(‘$main li:second-child’).innerHTML = ’ M
• D. ’;
• E. document.querySelector(‘$main li.Tony’).innerHTML = ’ M
• F. ’;
• G. document.querySelector(‘$main li:nth-child(2)’),innerHTML = ’ M
• H. ’;

Answer: D

NEW QUESTION 12
Refer to the following code that performs a basic mathematical operation on a provided input:
function calculate(num) { Return (num +10) / 3;
}
How should line 02 be written to ensure thatx evaluates to 6 in the line below? Let x = calculate (8);

• A. Return Number((num +10) /3 );
• B. Return (Number (num +10 ) / 3;
• C. Return Integer(num +10) /3;
• D. Return Number(num + 10) / 3;

Answer: B

NEW QUESTION 13
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.

• A. Use the DOM inspector to prevent the load event to be fired.
• B. Use the browser to execute a script that removes all the element containing the class ad-library-item.
• C. Use the DOM inspector to remove all the elements containing the class ad-library-item.
• D. Use the browser console to execute a script that prevents the load event to be fired.

Answer: B

NEW QUESTION 14
Refer to the code below:
Const resolveAfterMilliseconds = (ms) => Promise.resolve ( setTimeout (( => console.log(ms), ms ));
Const aPromise = await resolveAfterMilliseconds(500); Const bPromise = await resolveAfterMilliseconds(500); Await aPromise, wait bPromise;
What is the result of runningline 05?

• A. aPromise and bPromise run sequentially.
• B. Neither aPromise or bPromise runs.
• C. aPromise and bPromise run in parallel.
• D. Only aPromise runs.

Answer: B

NEW QUESTION 15
Refer to the code below:

Which two statements correctly execute the runParallel () function? Choose 2 answers

• A. Async runParallel () .then(data);
• B. runParallel ( ). done(function(data){ return data;});
• C. runParallel () .then(data);
• D. runParallel () .then(function(data) return data

Answer: BD

NEW QUESTION 16
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