Salesforce Exam 2025 JavaScript-Developer-I Dumps Updated Questions UPDATED Nov-2025
Get The Most Updated JavaScript-Developer-I Dumps To Salesforce Developer Certification
NEW QUESTION # 83
A developer has the following array of student test grades:
Let arr = [ 7, 8, 5, 8, 9 ];
The Teacher wants to double each score and then see an array of the students
who scored more than 15 points.
How should the developer implement the request?
- A. Let arr1 = arr.mapBy (( num) => ( return num *2 )) .filterBy (( val ) => return val > 15 )) ;
- B. Let arr1 = arr.map((num) => ( num *2)).filterBy((val) => ( val >15 ));
- C. Let arr1 = arr.filter(( val) => ( return val > 15 )) .map (( num) => ( return num *2 ))
- D. Let arr1 = arr.map((num) => num*2). Filter (( val) => val > 15);
Answer: D
NEW QUESTION # 84
Refer to the code below:
What are the values for first and second once the executes?
- A. First is why and second is when.
- B. First is who and second is when.
- C. First is why and second is where.
- D. First is who and second is where.
Answer: C
NEW QUESTION # 85
A developer has a web server running with Node.js. The command to start the web server is node server.js. The web server started having latency issues. Instead of a one second turnaround for web requests, the developer now sees a five second turnaround.
Which command can the web developer run to see what the module is doing during the latency period?
- A. NODE_DEBUG=http,https node server.js
- B. DEBUG=http, https node server.js
- C. DEBUG=true node server.js
- D. NODE_DEBUG=true node server.js
Answer: C
NEW QUESTION # 86
Refer to the code below:
01 const server = require('server');
02 /* Insert code here */
A developer imports a library that creates a web server. Theimported library uses events and callbacks to start the servers Whichcode should be inserted at the line 03 to set up an event and start the web server ?
- A. server.on(' connect ' , ( port) => {console.log('Listening on ' , port) ;})
- B. Server.start ();
- C. console.log( 'Listening on ', port);
- D. server()
- E. serve(( port) => (
Answer: A
NEW QUESTION # 87
Which statement parses successfully?
- A. JSON.parse (""foo'");
- B. JSON.parse ("foo");
- C. JSON.parse ("foo");
- D. JSON. parse (""foo"');
Answer: D
NEW QUESTION # 88
Cloud Kicks has a classto represent items for sale in an online store, as shown below:
Class Item{
constructor (name, price){
this.name = name;
this.price = price;
}
formattedPrice(){
return 's' + String(this.price);}}
A new business requirement comes in that requests a ClothingItem class that should have all of the properties and methods of the Item class but will also have properties that are specific to clothes.
Which line of code properly declares the clothingItem class such that it inherits from Item?
- A. Class ClothingItem extends Item {
- B. Class ClothingItem {
- C. Class ClothingItem super Item {
- D. Class ClothingItemimplements Item{
Answer: A
NEW QUESTION # 89
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 number in the array, The test passes:
Let res = sum2([1, 2, 3 ]) ;
console.assert(res === 6 );
Res = sum3([ 1, 2, 3, 4]);
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. The test passes:
Which two results occur when running the test on the updated sum3 function ?
Choose 2 answers
- A. The line 05 assertion fails.
- B. The line 02 assertion passes.
- C. The line 02 assertion fails
- D. The line 05 assertion passes.
Answer: A,B
NEW QUESTION # 90
Refer to the string below.
Const str='Salesforce';
Which two statements results in the word 'Sales'?
Answer:
Explanation:
See the Answer below in explanation:
Explanation
Str.substring(0,5);
Str.substr(0,5);
NEW QUESTION # 91
Refer to the code below:
What is the output after the ode executes successfully?
- A. Start
End
Success - B. Success
Start
End - C. End
Start
Success - D. Start
Success
End
Answer: D
NEW QUESTION # 92
Refer to the code below:
Which statement allows a developer to cancel the scheduled timed function?
- A. ClearTimeout (timeFunction);
- B. ClearTimeout (timerId) ;
- C. removeTimeout (timeFunction) ;
- D. removeTimeout (timerId) ;
Answer: C
NEW QUESTION # 93
Given the following code:
Let x =null;
console.log(typeof x);
What is the output of the line 02?
- A. "X"
- B. "Object"
- C. "Null"
- D. "undefined"
Answer: B
NEW QUESTION # 94
A developer has an ErrorMandler module that contains multiple functions.
What kind of export should be leveraged so that multiple function can be used?
- A. Multi
- B. default
- C. Named
- D. All
Answer: C
NEW QUESTION # 95
Universal Containers (UC) just launched a new landing page, but users complain that the website is slow. A developer found some functions any that might cause this problem. To verify this, the developer decides to execute everything and log the time each of these three suspicious functions consumes.
Which function can the developer use to obtain the time spent by every one of the three functions?
- A. console. timeLog ()
- B. console.timeStamp ()
- C. console.trace()
- D. console.getTime ()
Answer: A
NEW QUESTION # 96
Refer to the following code that imports a module named Utills,
Which two implementations of Utill, je export foo and bar such that the code above runs without error?
Choose 2 answers
- A. //FooUtill.js and barUtils, js exist
Import (foo) from ,/Path/footUtils.js,:
Export (foo, bar) - B. Const foo = ( ) => ( return 'foo; ; )
Const bar => => { return 'bar ';}
Export default foo, bar; - C. Const foo = () => ( return 'foo ' ; )
Const bar => ( return 'bar' ; )
Export (foo, bar) - D. Export default class (
Foo ( ) ( return 'foo ,; )
Bar ( ) ( return ;bar ; )
Answer: D
NEW QUESTION # 97
Refer to the code below:
Const searchTest = 'Yay! Salesforce is amazing!" ;
Let result1 = searchText.search(/sales/i);
Let result 21 = searchText.search(/sales/i);
console.log(result1);
console.log(result2);
After running this code, which result is displayed on the console?
- A. > true > false
- B. > 5>undefined
- C. > 5 > 0
- D. > 5 > -1
Answer: D
NEW QUESTION # 98
Given the following code:
What will be the first four numbers logged?
- A. 0012
- B. 0122
- C. 0123
- D. 0112
Answer: D
NEW QUESTION # 99
developer uses the code below to format a date.
After executing, what is the value of formattedDate?
- A. May 10, 2020
- B. October 05, 2020
- C. June 10, 2020
- D. November 05, 2020
Answer: C
NEW QUESTION # 100
Given the following code:
document.body.addEventListener(' click ', (event) => {
if (/* CODE REPLACEMENT HERE */) {
console.log('button clicked!');
)
});
Which replacement for the conditional statement on line 02 allows a developer to
correctly determine that a button on page is clicked?
- A. Event.clicked
- B. e.nodeTarget ==this
- C. event.target.nodeName == 'BUTTON'
- D. button.addEventListener('click')
Answer: C
NEW QUESTION # 101
Given the following code:
is the output of line 02?
- A. ''object''
- B. ''undefined''
- C. ''null'''
- D. ''x''
Answer: A
NEW QUESTION # 102
......
Salesforce Certified JavaScript-Developer-I Dumps Questions Valid JavaScript-Developer-I Materials: https://www.practicedump.com/JavaScript-Developer-I_actualtests.html
Current JavaScript-Developer-I Exam Dumps [2025] Complete Salesforce Exam Smoothly: https://drive.google.com/open?id=13mfs_2cW5-Q4mWUBJnP1zhFf0pa2z3zY