[Nov 22, 2021] Fully Updated Dumps PDF - Latest JavaScript-Developer-I Exam Questions and Answers
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Benefits in Obtaining Salesforce JavaScript-Developer-I Certification
With the introduction of the Lightning Experience by Salesforce, it is possible to develop cool, looking applications for a wide range of tasks. Admins have been able to create beautiful pages for their objects more than ever, with an interface entirely tailored for each user.For developers, the same application has never before been possible for Salesforce developers to create applications that stretch well beyond Salesforce’s declarative features. It’s all achieved with the use of a JavaScript application for Lightning & Lightning Web components.
The certification for JavaScript Developer I has just been released and fills a large gap in the certification list for Salesforce. Salesforce Developers who want to prove their Lightning skills, but also new entrants into the Salesforce community, are certified to demonstrate that they know what is relevant. A typical Salesforce 60 multi-choice test is split into two parts and is influenced by a super badge (Similar to Developer II certification).
Who should take the Salesforce JavaScript-Developer-I Exam
This course is designed for Javascript developers starting on the Salesforce platform who require programming customizations on front-end and back-end. There are no prerequisites for Salesforce JavaScript Developer I Exam. Typical job roles that align to the Salesforce Certified JavaScript Developer I are as follows:
- Software/backend developer
- Salesforce developer
- Support engineer
- Web application developer
- Technical Product Manager
- UI/UX Engineer
- Front end developer
- JavaScript programmer
- Full stack developer
- Technical Project Manager
NEW QUESTION 24
Refer to the following array:
Let arr1 = [1, 2, 3, 4, 5];
Which two lines of codes result in a second array, arr2, being created such that arr2 is not a reference to arr1? Choose 2 answers
- A. Let arr2 = arr1 .slice (0, 5);
- B. Let arr2 = arr1 sort ();
- C. Let arr2 = Array. From (arr1) ;
- D. Let arr2 = arr1;
Answer: B,D
NEW QUESTION 25
Refer to the following code:
What is returned by the function call on line 13?
- A. Null value
- B. Undefined
- C. Undefined value.
- D. Line 13 throws an error.
Answer: D
NEW QUESTION 26
A developer creates a generic function to log custom messages In the console. To do this, the function below is implemented.
Which three console logging methods allow the use of string substitution in line 02?
Choose 3 answers
- A. Log
- B. Assert
- C. Info
- D. error
- E. Message
Answer: B,D,E
NEW QUESTION 27
Refer to the code below:
For (let number =2: number <= S; number += 1) ( // insert code statement here The developer needs to insert a code statement in the location shown. The code statement has these requirements:
1. Does not require an import
2. Logs an error when the Boolean statement evaluates to false
3. Works In both the browser and Node.js
Which statement meet these requirements?
- A. Console. Assert ( number $ 2 == 0 ) ;
- B. Console. error (number $ 2 == 0) ;
- C. Assert (number $ 2 == 0);
- D. Console. Debug (number $ 2 == 0) ;
Answer: A
NEW QUESTION 28
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?
- A. Server.on ('error', (error) => {
console.log('ERROR', error);
}); - B. Try{
server.start();
} catch(error) { - C. Server.error ((server) => {
console.log('ERROR', error);
}); - D. Server.catch ((server) => {
console.log('ERROR', error);
});
Answer: A
Explanation:
console.log('ERROR', error);
}
NEW QUESTION 29
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:
There is a new requirement for a developer to implement a description method that will retrun a brief description for item and saleitem.
What is the out when executing the code above?
- A. This is a Scarf
This is a Shirt
This is a Scarf
This is a discounted Shirt - B. This is a Scarf
This is a Shirt
This is a discounted Scard
This is a discounted Shirt - C. This is a Scaf
Uncaught TypeError: saleItem, description is not a function
This is a Shirt
This is a discounted Shirt - D. This is a Scarf
Unicaught TypeError: saleitem, description is not a function
This is a Scarf
This is a discounted Shirt
Answer: A
NEW QUESTION 30
Refer to the code below:
Which code executes syhello once, two minutes from now?
- A. SetTimeout (sayhello( ), 120000) ;
- B. SetInterval (sayhello, 120000) ;
- C. SetTimeout (sayhello, 120000) ;
- D. delay (sayhello, 120000) ;
Answer: A
NEW QUESTION 31
A developer wants to set up a secure web server with Node.js. The developer create a directory locally called app-server, and the first file is app-server/index, js.
Without using any third-party libraries, what should the developer add to index, js to create the secure web server?
- A. Const http = require ('http');
- B. Const http = require ('https') ;
- C. Const tls = require ('tls') ;
- D. Const server = require ( 'secure-server') ;
Answer: B
NEW QUESTION 32
A developer has two ways to write a function:
After deciding on an option, the developer creates 1000 monster objects.
How many growl methods are created with Option A and Option B?
- A. 1000 growl methods are created for Option A. 1 growl method is created for Option B.
- B. 1 growl method is created for Option A. 1000 growl methods are created for Option B.
- C. 1000 growl methods are created regardless of which option is used.
- D. 1 growl method is created regardless of which option is used.
Answer: A
NEW QUESTION 33
A developer receives a comment from the Tech lead that the code below gives an error.
Which line edit should be made to make this code run?
- A. 03 if (year == 2019) (
- B. 02 const year = 2020;
- C. 01 let monthname = 'July ';
- D. 02 let year = 2019 ;
Answer: B
NEW QUESTION 34
Refer to the code below:
Line 05 causes an error.
What are the values of greeting and salutation once code completes?
- A. Greeting is Hello and salutation is Hello, Hello.
- B. Greeting is Goodbye and salutation is I say Hello.
- C. Greeting is Hello and salutation is I say hello.
- D. Greeting is Goodbye and salutation is Hello, Hello.
Answer: A
NEW QUESTION 35
Given the requirement to refactor the code above to JavaScript class format, which class definition is correct?
A)
B)
C)
D)
- A. Option C
- B. Option A
- C. Option B
- D. Option D
Answer: B
NEW QUESTION 36
A developer wrote a fizzbuzz function that when passed in a number, returns the following:
Fizz if the number is divisible by 3.
Buzz if the number is divisible by 5.
Fizzbuzz if the number is divisible by both 3 and 5.
Empty string if the number is divisible by neither 3 or 5.
Which two test cases will properly test scenarios for the fizzbuss function?
- A. Let res = fizzbuss (Infinity);
Console.assert (res === '' ) ; - B. Let res = fizzbuss (5) ;
Console. assert (res === '' ) ; - C. Let res = fizzbuss (3) ;
Console.assert (res === 'buzz' ) ; - D. Let res = fizzbuss (15) ;
Console. assert (res === 'fizzbuzz' ) ;
Answer: A,D
NEW QUESTION 37
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 to execute a script that removes all the element containing the class ad-library-item.
- B. Use the DOM inspector to remove all the elements containing the class ad-library-item.
- C. Use the browser console to execute a script that prevents the load event to be fired.
- D. Use the DOM inspector to prevent the load event to be fired.
Answer: A
NEW QUESTION 38
Refer to the following code that performs a basis mathematical operation on a provided input:
How should line o2 be written to ensure that x evaluated to 6 in the line below?
Let x calculate (''g'');
- 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: D
NEW QUESTION 39
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 = Array.from(arr1);
- B. Let arr2 = arr1.slice(0, 5);
- C. Let arr2 = arr1.sort();
- D. Let arr2 = arr1;
Answer: A,B
NEW QUESTION 40
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. '?
- A. Super = (plate ) ;
- B. Vehicle.plate = plate
- C. This .plate = plate;
- D. Super.plate = plate;
Answer: A,B,C
NEW QUESTION 41
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