[Sep 23, 2026] Prepare For The JavaScript-Developer-I Question Papers In Advance [Q59-Q80]

September 23, 2026September 23, 2026 examdumps[Sep 23, 2026] Prepare For The JavaScript-Developer-I Question Papers In Advance [Q59-Q80] 0 Comment

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[Sep 23, 2026] Prepare For The JavaScript-Developer-I Question Papers In Advance

JavaScript-Developer-I PDF Dumps Real 2026 Recently Updated Questions

NEW QUESTION 59
Refer to the expression below:
Let x = (‘1’ + 2) == (6 * 2);
How should this expression be modified to ensure that evaluates to false?

Let x = (‘1’ + ‘ 2’) == ( 6 * 2);

Let x = (‘1’ + 2) == ( 6 * 2);

Let x = (1 + 2) == ( ‘6’ / 2);

Let x = (1+ 2 ) == ( 6 / 2);

NEW QUESTION 60
bar, awesome is a popular JavaScript module. the versions publish to npm are:

Teams at Universal Containers use this module in a number of projects. A particular project has thepackage, json definition below.

A developer runs this command: npm install.
Which version of bar .awesome is installed?

1.3.1

1.3.5

The command fails, because version 130 is not found

1.4.0

NEW QUESTION 61
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 insidethe 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.

Use the DOM inspector to prevent the load eventto be fired.

Use the browser to execute a script that removes all the element containing the class ad-library-item.

Use the DOM inspector to remove all the elements containing the class ad-library-item.

Use the browser console to execute a scriptthat prevents the load event to be fired.

NEW QUESTION 62
After user acceptance testing, the developer is asked to change the webpage background based on the user’s location. It works on the developer’s computer but not on the tester’s machine.
Which two actions will help determine accurate results?

The tester should disable their browser cache.

The developer should inspect their browser refresh settings.

The tester should clear their browser cache.

The developer should rework the code.

Browsers often cache JavaScript, CSS, and HTML. This means:
* The developer may be running with the latest version (often with cache disabled in DevTools).
* The tester may still be loading an older, cached version of the page where the background-change logic does not exist.
To ensure they are actually testing the latest deployed code:
* Disabling cache (A) in the tester’s browser (usually via DevTools # Network # “Disable cache”) forces fresh loading of all resources on each refresh.
* Clearing cache (C) removes older resources from the browser so the next load fetches fresh files from the server.
Options B and D do not directly help verify the tester is using the latest code:
* B checks the developer’s own browser, which is not the environment showing the problem.
* D suggests reworking the code before confirming whether the tester is actually loading the correct version, which is premature.
So the two actions that help produce accurate testing results are A and C.

NEW QUESTION 63
Given the code below:

What is logged to the console’

1 2 3 4 5

1 2 5 3 4

2 5 1 3 4

2 5 3 4 1

NEW QUESTION 64
In the browser, the window object is often used to assign variables that require the broadest scope in an application Node.js application does not have access to the window object by default.
Which two methods are used to address this ?
Choose 2 answers

Use the document object instead of the window object.

Assign variables to the global object.

Create a new window object in the root file.

Assign variables to module.exports and require them as needed.

NEW QUESTION 65
Refer to thefollowing code that imports a module named utils:
import (foo, bar) from ‘/path/Utils.js’;
foo() ;
bar() ;
Which two implementations of Utils.js export foo and bar such that the code above runs without error?
Choose 2 answers

// FooUtils.js and BarUtils.js existImport (foo) from ‘/path/FooUtils.js’;Import (boo) from ‘
/path/NarUtils.js’;

const foo = () => { return ‘foo’ ; }const bar = () => { return ‘bar’ ; }export { bar, foo }

Export default class {foo() { return ‘foo’ ; }bar() { return ‘bar’ ; }}

const foo = () => { return ‘foo’;}const bar = () => {return ‘bar’; }Export default foo, bar;

NEW QUESTION 66
Refer to the code below:

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

Resolved1 Resolved2 Resolved3Resolved4

Rejected

Rejected Resolved

Rejected1 Rejected2 Rejected3 Rejected Rejected Rejected4

NEW QUESTION 67
Refer to the code below:

What is the value of result after the code executes?

NaN

undefined

NEW QUESTION 68
Refer to the code below:

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

Resolved1 Resolved2 Resolved3Resolved4

Rejected

Rejected Resolved

Rejected1 Rejected2 Rejected3 Rejected Rejected Rejected4

NEW QUESTION 69
let sampleText = ” The quick brown fox jumps ” ;
Which three expressions return true for a substring?

sampleText.includes( ‘ fox ‘ );

sampleText.indexOf( ‘ quick ‘ ) > -1;

sampleText.indexOf( ‘ fox ‘ ) !== -1;

sampleText.include( ‘ fox ‘ ) !== -1;

sampleText.indexOf( ‘ Quick ‘ ) !== -1;

The correct answers are A, B, and C .
The original variable name appears to contain a typing error. The variable should be used consistently as sampleText:
let sampleText = ” The quick brown fox jumps ” ;
A is correct because includes() checks whether a string contains a specific substring and returns a Boolean value:
sampleText.includes( ‘ fox ‘ );
Since ” fox ” exists inside ” The quick brown fox jumps ” , this returns:
true
B is correct after correcting the typing error. The correct expression is:
sampleText.indexOf( ‘ quick ‘ ) > -1;
indexOf() returns the index position where the substring is found. If the substring is not found, it returns -1.
Since ” quick ” exists in the string, sampleText.indexOf( ‘ quick ‘ ) returns a value greater than -1, so the expression returns:
true
C is correct after correcting the missing quotation marks and adding a Boolean comparison:
sampleText.indexOf( ‘ fox ‘ ) !== -1;
The substring ” fox ” exists in the string, so indexOf( ‘ fox ‘ ) does not return -1. Therefore, the expression returns:
true
D is incorrect because the method name is typed incorrectly. JavaScript string has includes(), not include().
Incorrect:
sampleText.include( ‘ fox ‘ )
Correct:
sampleText.includes( ‘ fox ‘ )
E is incorrect because JavaScript string matching is case-sensitive:
sampleText.indexOf( ‘ Quick ‘ ) !== -1;
The string contains ” quick ” with a lowercase q, not ” Quick ” with an uppercase Q, so this returns:
false
Therefore, the verified answers are A, B, and C .

NEW QUESTION 70
Refer to the code below:
<html lang=”en”>
<table onclick=”console.log(Table log’);”>
<tr id=”row1″>
<td>Click me!</td>
</tr>
<table>
<script>
function printMessage(event) {
console.log(‘Row log’);
}
Let elem = document.getElementById(‘row1’);
elem.addEventListener(‘click’, printMessage, false);
</script>
</html>
Which code change should be made for the console to log only Row log when ‘Click me! ‘ is
clicked?

Add.event.stopPropagation(); to window.onLoad event handler.

Add event.stopPropagation(); to printMessage function.

Add event.removeEventListener(); to window.onLoad event handler.

Add event.removeEventListener(); toprintMessage function.

NEW QUESTION 71
Refer to the code below:
let timeFunction =() => {
console.log(‘Timer called.”);
};
let timerId = setTimeout (timedFunction, 1000);
Which statement allows a developer to cancel the scheduled timed function?

removeTimeout(timedFunction);

removeTimeout(timerId);

clearTimeout(timerId);

clearTimeout(timedFunction);

NEW QUESTION 72
A developer initiates a server with the file server,js and adds dependencies in the source codes package,json that are required to run the server.
Which command should the developer run to start the server locally?

start server,js

npm start server,js

npm start

node start

NEW QUESTION 73
Refer to the code below:
let sayHello = () => {
console.log (‘Hello, world!’);
};
Which code executes sayHello once, two minutes from now?

setTimeout(sayHello, 12000);

setInterval(sayHello, 12000);

setTimeout(sayHello(), 12000);

delay(sayHello, 12000);

NEW QUESTION 74
Teams at Universal Containers (UC) work on multiple JavaScript projects at the same time.
UC is thinking about reusability and how each team can benefit from the work of others.
Going open-source or public is not an option at this time.
Which option is available to UC with npm?

Private packages can be scored, and scopes can be associated to a private
registries.

Private registries are not supported by npm, but packages can be installed via URL.

Private packages are not supported, but they can use another package manager like
yarn.

Private registries are not supported by npm, but packages can be installed via git.

NEW QUESTION 75
A developer has a formatName function that takes two arguments, firstName and lastName and returns a string. They want to schedule the function to run once after five seconds.
What is the correct syntax to schedule this function?

setTimeout (formatName(), 5000, “John”, “BDoe”);

setTimeout (formatName(‘John’, ”Doe’), 5000);

setTimout(() => { formatName(“John’, ‘Doe’) }, 5000);

setTimeout (‘formatName’, 5000, ‘John”, “Doe’);

NEW QUESTION 76
developer creates a new web server that uses Node.js. It imports a server library that uses events and callbacks for handling server functionality.
The server library is imported with require and is made available to the code by a variable named server. The developer wants to log any issues that the server has while booting up.
Given the code and the information the developer has, which code logs an error at boost with an event?

Server.catch ((server) => {
console.log(‘ERROR’, error);
});

Server.error ((server) => {
console.log(‘ERROR’, error);
});

Server.on (‘error’, (error) => {
console.log(‘ERROR’, error);
});

Try{
server.start();
} catch(error) {
console.log(‘ERROR’, error);
}

NEW QUESTION 77
A developer wants to create an object from a function in the browser using the code below.

What happens due to the lack of the mm keyword on line 02?

window.name is assigned to ‘hello’ and the variable = remains undefined.

window.m Is assigned the correct object.

The m variable is assigned the correct object but this.name remains undefined.

The m variable is assigned the correct object.

NEW QUESTION 78
What are two unique features of functions defined with a fat arrow as compared to normal function definition?
Choose 2 answers

The function generated its own this making it useful for separating the function’s scope from its enclosing scope.

The function receives an argument that is always in scope, called parentThis, which is the enclosing lexical scope.

If the function has a single expression in the function body, the expression will be evaluated and implicit returned.

The function uses the this from the enclosing scope.

NEW QUESTION 79
Refer the following code

what is the value of array after code executes?

[ 1, 2, 3, 5 ]

NEW QUESTION 80
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 numbers in the array. The test passes:
01 let res = sum3([1, 2, 3]);
02 console.assert(res === 6);
03
04 res = sum3([1, 2, 3, 4]);
05 console.assert(res === 6);
A different developer made changes to the behavior of sum3 to instead sum all of the numbers present in the array.
Which two results occur when running the test on the updated sum3 function?

The line 02 assertion fails.

The line 05 assertion passes.

The line 05 assertion fails.

The line 02 assertion passes.

New behavior: sum3 now returns the sum of all elements .
* Line 01: sum3([1, 2, 3]) # 1 + 2 + 3 = 6
* Assertion on line 02: res === 6 # passes.
* Line 04: sum3([1, 2, 3, 4]) # 1 + 2 + 3 + 4 = 10
* Assertion on line 05: res === 6 # 10 === 6 is false, so the assertion fails.
So:
* Line 02 assertion passes # D.
* Line 05 assertion fails # C.

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Salesforce JavaScript-Developer-I Certification Exam is a multiple-choice exam that consists of 60 questions, which must be completed in 105 minutes. JavaScript-Developer-I exam is administered online and can be taken from any location. The passing score for the exam is 68%, and the cost to take the exam is $200. Candidates who do not pass the exam on their first attempt can retake the exam after a waiting period of 15 days.

JavaScript-Developer-I Dumps and Practice Test (149 Exam Questions): https://www.dumpsmaterials.com/JavaScript-Developer-I-real-torrent.html