Latest Sep-2024 Salesforce JavaScript-Developer-I Dumps Updated 224 Questions
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Earning the Salesforce Certified JavaScript Developer I certification demonstrates a candidate's proficiency in developing custom applications using JavaScript in Salesforce. Salesforce Certified JavaScript Developer I Exam certification is a valuable asset for individuals seeking to advance their careers in Salesforce development or for organizations looking to hire skilled Salesforce developers. Salesforce Certified JavaScript Developer I Exam certification also provides access to the Salesforce Certified Community, which offers networking opportunities, exclusive resources, and ongoing support for Salesforce developers.
NEW QUESTION # 56
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, 4, 5, 4]
- B. [1, 2, 3, 4, 5, 4, 4]
- C. [1, 2, 3, 4, 5, 4]
- D. [1, 2, 3, 5]
Answer: A
Explanation:
NEW QUESTION # 57
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 browser console to execute a script that prevents the load event to be fired.
- B. Use the DOM inspector to remove all the elements containing the class ad-library-item.
- C. Use the DOM inspector to prevent the load event to be fired.
- D. Use the browser to execute a script that removes all the element containing the class ad-library-item.
Answer: D
NEW QUESTION # 58
Refer to the expression below:
Let x = ('1' + 2) == (6 * 2);
How should this expression be modified to ensure that evaluates to false?
- A. Let x = ('1' + 2) == ( 6 * 2);
- B. Let x = ('1' + ' 2') == ( 6 * 2);
- C. Let x = (1 + 2) == ( '6' / 2);
- D. Let x = (1+ 2 ) == ( 6 / 2);
Answer: A
NEW QUESTION # 59
Refer to the expression below:
Let x = ('1' + 2) == (6 + 2) ;
How should this expression be modified to ensure that a evaluated to false?
- A. Let x = (1' + '2') === (6 / 2) ;
- B. Let x = (1' + '2') == (6 + 2) ;
- C. Let x = (1' + '2') === (6 + 2) ;
- D. Let x = (1' + '2') == ('6' / 2) ;
Answer: C
NEW QUESTION # 60
Refer to the code:
Given the code above, which three properties are set for pet1? Choose 3 answers
- A. owner
- B. name
- C. speak
- D. canTalk
- E. type
Answer: B,D,E
NEW QUESTION # 61
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: A
NEW QUESTION # 62
Given the requirement to refactor the code above to JavaScript class format, which class definition is correct?
- A.
- B.
- C.
- D.
Answer: A
NEW QUESTION # 63
Refer to the code below:
Const pi = 3.1415326,
What is the data type of pi?
- A. Float
- B. Decimal
- C. Double
- D. Number
Answer: D
NEW QUESTION # 64
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. 'Update' , {
Details : {
recordId : '123abc' - D. { type : 'update', recordId : '123abc' }
Answer: A,C
Explanation:
}
}
NEW QUESTION # 65
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?
- A. 1000 growl methods are created regardless of which option is used.
- B. 1 growl method is created for Option A. 1000 growl methods are created for Option B.
- C. 1 growl method is created regardless of which option is used.
- D. 1000 growl method is created for Option A. 1 growl methods are created for Option B.
Answer: D
NEW QUESTION # 66
Which two code snippets show working examples of a recursive function?
Choose 2 answers
A)
B)
C)
D)
- A. Option D
- B. Option B
- C. Option C
- D. Option A
Answer: A,C
NEW QUESTION # 67
Refer to the code below:
Let car1 = new Promise((_ , reject) =>
setTimeout(reject, 2000, "car 1 crashed in" =>
Let car2 =new Promise(resolve => setTimeout(resolve, 1500, "car 2 completed")
Let car3 =new Promise(resolve => setTimeout(resolve, 3000, "car 3 completed")
Promise.race(( car1, car2, car3))
.then (value => (
Let result = '$(value) the race.';)}
.catch(arr => {
console.log("Race is cancelled.", err);
});
What is the value of result when Promise.race executes?
- A. Car 3 completes the race
- B. Car 2 completed the race.
- C. Car 1 crashed in the race.
- D. Race is cancelled.
Answer: B
NEW QUESTION # 68
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 ?
- A. This is a Scarf
Uncaught TypeError: saleItem.description is not a function
This is aScarf
This is a discounted Shirt - B. This is a Scarf
This is a Shirt
This is a discounted Scarf
This is a discounted Shirt - C. This is a Scarf
This is a Shirt
This is a Scarf
This is a discounted Shirt - D. This is aScarf
Uncaught TypeError: saleItem.description is not a function
This is a Shirt
This is a did counted Shirt
Answer: C
NEW QUESTION # 69
Given the following code:
Counter = 0;
const logCounter = () => {
console.log(counter);
);
logCounter();
setTimeout(logCOunter, 1100);
setInterval(() => {
Counter++
logCounter();
}, 1000);
What is logged by the first four log statements?
- A. 0 1 2 3
- B. 0 1 1 2
- C. 0 0 1 2
- D. 0 1 2 2
Answer: B
NEW QUESTION # 70
Refer the following code
What is the value of array after code executes?
Answer:
Explanation:
1, 2, 3, 5
NEW QUESTION # 71
Refer of the string below:
Const str = 'sa;esforce'=;
Which two statement result in the word 'Sale'?
Choose 2 answers
- A. str, substr(1,5) ;
- B. str, substring(1,5) ;
- C. str, substring (0,5) ;
- D. str, substr(0,5) ;
Answer: C,D
NEW QUESTION # 72
Refer to the code declarations below:
Which three expressions return the string JavaScript?
Choose 3 answers
- A. Concat (str1, str2);
- B. Str1.join (str2);
- C. $(str1) $ (str2} ';
- D. Str1.concat (str2);
- E. Str1 + str2;
Answer: C,D,E
NEW QUESTION # 73
Refer to the code below:
What is the value of result when the code executes?
- A. 10 - 10
- B. 10 - 5
- C. 5 - 5
- D. 5 - 10
Answer: A
NEW QUESTION # 74
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?
- A. Let arr2 = arr1.sort();
- B. Let arr2 = Array.from(arr1);
- C. Let arr2 = arr1;
- D. Let arr2 = arr1.slice(0, 5);
Answer: B,D
NEW QUESTION # 75
The developer wants to test the code:
Const toNumber = (strOrNum) => + strOrNum;
Which two tests are most accurate for this code? Choose 2 answers
- A. Console.assert (toNumber ('2') === 2 ) ;
- B. Console,assert (toNumber ( ) === NaN ) ;
- C. Console. Assert (Number,isNaN (toNumber ( ) ));
- D. Console,assert (toNumber ( '-3') < 0);
Answer: A,B
NEW QUESTION # 76
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=true node server.js
- C. DEBUG=http, https node server.js
- D. NODE_DEBUG=true node server.js
Answer: B
NEW QUESTION # 77
A developer is leading the creation of a new web server for their team that will fulfill API requests from an existing client.
The team wants a web server that runs on Node.Js, and they want to use thenew web framework Minimalist.Js.
The lead developer wants to advocate for a more seasoned back-end framework that already has a community around it.
Which two frameworks could the lead developer advocate for?
Choose 2 answers
- A. Koa
- B. Angular
- C. Gatsby
- D. Express
Answer: B,C
NEW QUESTION # 78
Which code statement below correctly persists an object in localStorage?
- A. const setLocalstorage = (jsobject) =>
Windows.localstorage.connectobject(jsObject); - B. Const setlocalstorage = (storagekey, jsObject) => (
Window. Localstorage.persist (storagekey, jsObject);
) - C. const setLocalstorage = (storageKey , jsobject) => (
windows. LocalStorage,setitem(storagekey. jSON,string
) - D. Const setLocalstorage = (jsobject ) => (
Window .localstorage .setitem (jsobject) ;
Answer: A
NEW QUESTION # 79
......
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