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JavaScript-Developer-I Exam Dumps Contains FREE Real Quesions from the Actual Exam
Salesforce Certified JavaScript Developer I exam is a highly recognized certification that demonstrates a developer's ability to design, develop, and maintain custom applications using JavaScript in the Salesforce platform. Salesforce Certified JavaScript Developer I Exam certification exam is created to test the knowledge and skills of developers in areas like Apex, Visualforce, and Lightning components.
The Salesforce JavaScript-Developer-I exam itself consists of 60 multiple-choice questions, which must be completed within a time limit of 105 minutes. The questions are designed to test your knowledge of various topics related to JavaScript and Salesforce. To pass the exam, you must score at least 68 percent.
NEW QUESTION # 24
Given the following code:
What is the output of line 02?
- A. "null"
- B. "x-
- C. 'object"
- D. "undefined" 0
Answer: C
NEW QUESTION # 25
Given the code below:
Which method can be used to provide a visual representation of the list of users and to allow sorting by the name or email attribute?
- A. console.info(usersList) ;
- B. console.group(usersList) ;
- C. console.groupCol lapsed (usersList) ;
- D. console.table(usersList) ;
Answer: B
NEW QUESTION # 26
A developer wants to set up a secure web server with Node.js. The developer creates 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 https =require('https');
- B. const http =require('http');
- C. const server =require('secure-server');
- D. const tls = require('tls');
Answer: A
NEW QUESTION # 27
Given the code below:
What is logged to the console'
- A. 1 2 5 3 4
- B. 2 5 1 3 4
- C. 1 2 3 4 5
- D. 2 5 3 4 1
Answer: D
NEW QUESTION # 28
Refer to the code below:
What is the value of result when the code executes?
- A. 5-5
- B. 10-10
- C. 10-5
- D. 5-10
Answer: B
NEW QUESTION # 29
Given the code below:
What is logged to the console?
- A. 1 2 5 3 4
- B. 1 2 4 3 5
- C. 2 5 1 3 4
- D. 2 1 4 3 5
Answer: C
NEW QUESTION # 30
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, and the test passes.
A different developer made changes to the behavior of sum3 to instead sum only the first two numbers present in the array.
Which two results occur when running this test on the updated sum3 function?
Choose 2 answers
- A. The line 05 assertion passes.
- B. The line 05 assertion fails.
- C. The line 02 assertion fails.
- D. The line 02 assertion passes.
Answer: B,D
NEW QUESTION # 31
A developer is asked to fix some bugs reported by users. To do that, the developer adds a breakpoint for debugging.
Function Car (maxSpeed, color){
This.maxspeed =masSpeed;
This.color = color;
Let carSpeed = document.getElementById(' CarSpeed');
Debugger;
Let fourWheels =new Car (carSpeed.value, 'red');
When the code execution stops at the breakpoint on line 06, which two types of information are available in the browser console ?
Choose 2 answers:
- A. The information stored in the window.localStorage property
- B. The values of the carSpeed and fourWheels variables
- C. A variable displaying the number of instances created for the Car Object.
- D. The style, event listeners and other attributes applied to the carSpeed DOM element
Answer: A,D
NEW QUESTION # 32
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?
- A. node start
- B. npm start
- C. npm start server,js
- D. start server,js
Answer: B
NEW QUESTION # 33
Refer to the code below:
Which two function can replace line 01 and return 58 to sum? Choose 2 answers
- A. Const addby = function (num1) (
Return function (num2) (
}
} - B. const addBy = function (num1) {
Return function (num2) {
}
} - C. const addBy = num1 (num2) => num1 + num2 ;
- D. const addBy = (num1) num1 + num2
Answer: B,C
NEW QUESTION # 34
Refer to code below:
console.log(0);
setTimeout(() => (
console.log(1);
});
console.log(2);
setTimeout(() => {
console.log(3);
), 0);
console.log(4);
In which sequence will the numbers be logged?
- A. 0
- B. 02413
- C. 02431
- D. 01234
Answer: B
NEW QUESTION # 35
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 prevent the load event to be fired.
- C. Use the DOM inspector to remove all the elements containing the class ad-library-item.
- D. Use the browser to execute a script that removes all the element containing the class ad-library-item.
Answer: D
NEW QUESTION # 36
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 running line 05?
- A. Neither aPromise or bPromise runs.
- B. aPromise and bPromise run in parallel.
- C. Only aPromise runs.
- D. aPromise and bPromise run sequentially.
Answer: A
NEW QUESTION # 37
There is a new requirement for a developer to implement a currPrice method that will return the current price of the item or sales..
What is the output when executing the code above
- A. 0
- B. 1
- C. 50Uncaught TypeError: saleItem,desrcription is not a function5080
- D. 5080Uncaught ReferenceError:this,discount is undefined72
Answer: B
NEW QUESTION # 38
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 turn around 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 =true node server.js
- B. NODE_DEBUG =http, https node server.js
- C. DEBUG = http, https node server.js
- D. DEBUG =true node server.js
Answer: D
NEW QUESTION # 39
Refer to the code below:
Line 05 causes an error.
What are the values of greeting and salutation once code completes?
- A. Greeting is Goodbye and salutation is I say Hello.
- B. Greeting is Hello and salutation is I say hello.
- C. Greeting is Goodbye and salutation is Hello, Hello.
- D. Greeting is Hello and salutation is Hello, Hello.
Answer: D
NEW QUESTION # 40
Refer to the code below:
Async funct on functionUnderTest(isOK) {
If (isOK) return 'OK' ;
Throw new Error('not OK');
)
Which assertion accurately tests the above code?
- A. Console.assert (await functionUnderTest(true), ' not OK ')
- B. Console.assert (await functionUnderTest(true), 'OK')
- C. Console.assert (await functionUnderTest(true), ' OK ')
- D. Console.assert (await functionUnderTest(true), ' not OK ')
Answer: B
NEW QUESTION # 41
Given two expressions var1 and var2. What are two valid ways to return the logical AND of the two expressions and ensure it is data type Boolean ?
Choose 2 answers:
- A. var1.toBoolean() && var2toBoolean()
- B. var1 && var2
- C. Boolean(var1) && Boolean(var2)
- D. Boolean(var1 && var2)
Answer: C,D
NEW QUESTION # 42
Refer to the code below:
Considering that JavaScript is single-threaded, what is the output of line 08 after the code executes?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
NEW QUESTION # 43
Which javascript methods can be used to serialize an object into a string and deserialize
a JSON string into an object, respectively?
- A. JSON.serialize and JSON.deserialize
- B. JSON.stringify and JSON.parse
- C. JSON.encode and JSON.decode
- D. JSON.parse and JSON.deserialize
Answer: B
NEW QUESTION # 44
A developer creates an object where its properties should be immutable and prevent properties from being added or modified.
Which method should be used to execute this business requirement ?
- A. Object.lock()
- B. Object.eval()
- C. Object.freeze()
- D. Object.const()
Answer: C
NEW QUESTION # 45
A developer at Universal Containers is creating their new landing page based on HTML, CSS, and JavaScript.
To ensure that visitors have a good experience, a script named personalizeWebsiteContent needs to be executed when the webpage is fully loaded (HTML content and all related files), in order to do some custom initializations.
Which implementation should be used to call Fe:s:-a;::eHec5;te::.-.ter.: based on the business requirement above?
- A. Add a listener to the window object to handle the DOMContentLoaded event
- B. Add a listener to the window object to handle the lead event
- C. Add a handler to the personalizeWebsiteContent script to handle the DOMContentLoaded event
- D. Add a handler to the personalizeWebsiteContent script to handle the load event
Answer: B
NEW QUESTION # 46
......
Salesforce JavaScript-Developer-I certification is designed for developers who have a strong understanding of JavaScript and how it is used in the Salesforce platform. Salesforce Certified JavaScript Developer I Exam certification is an excellent way for developers to demonstrate their expertise in building custom solutions on the Salesforce platform using JavaScript.
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