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To be eligible for the Salesforce JavaScript-Developer-I exam, candidates must have a basic understanding of JavaScript programming and the Salesforce platform. They must also have experience working with Salesforce tools and technologies, such as Apex, Visualforce, and Lightning Components. JavaScript-Developer-I exam consists of multiple-choice questions, and candidates must achieve a passing score to earn the certification.
Salesforce JavaScript-Developer-I certification is ideal for developers who are looking to build their skills in developing custom applications on the Salesforce platform using JavaScript. Salesforce Certified JavaScript Developer I Exam certification validates the candidate's knowledge of Salesforce development best practices, including how to design and implement custom user interfaces, create custom business logic using Apex, and integrate with external systems using REST and SOAP APIs.
NEW QUESTION # 130
A developer is leading the creation of a new browser application that will serve a single page application. The team wants to use a new web framework Minimalsit.js. The Lead developer wants to advocate for a more seasoned web framework that already has a community around it.
Which two frameworks should the lead developer advocate for?
Choose 2 answers
- A. Angular
- B. Express
- C. Vue
- D. Koa
Answer: A,B
NEW QUESTION # 131
Refer to the code below:
What is the output after the ode executes successfully?
- A. Start
Success
End - B. Start
End
Success - C. Success
Start
End - D. End
Start
Success
Answer: A
NEW QUESTION # 132
Refer to the code below:
Which replacement for the conditional statement on line 02 allows a developer to correctly determine that a specific element, myElement on the page had been clicked?
Answer:
Explanation:
event.target.id =='myElement'
NEW QUESTION # 133
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?
- A. setTimout(() => { formatName("John', 'Doe') }, 5000);
- B. setTimeout ('formatName', 5000, 'John", "Doe');
- C. setTimeout (formatName('John', ''Doe'), 5000);
- D. setTimeout (formatName(), 5000, "John", "BDoe");
Answer: B
NEW QUESTION # 134
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 fizzbuzz function?
Choose 2 answers
- A. let res = fizzbuzz(Infinity);
console.assert ( res === ' ' ) - B. let res = fizzbuzz(3);
console.assert ( res === ' buzz ' ) - C. let res = fizzbuzz(5);
console.assert ( res === ' ' ); - D. let res = fizzbuzz(15);
console.assert ( res === ' fizzbuzz ' )
Answer: A,B,D
NEW QUESTION # 135
Given the code below:
What is logged to the console'
- A. 1 2 3 4 5
- B. 2 5 1 3 4
- C. 2 5 3 4 1
- D. 1 2 5 3 4
Answer: C
NEW QUESTION # 136
A developer receives a comment from the Tech Lead that the code given below has error:
const monthName = 'July';
const year = 2019;
if(year === 2019) {
monthName = 'June';
}
Which line edit should be made to make this code run?
- A. 03 if (year == 2019) {
- B. 02 const year = 2020;
- C. 02 let year =2019;
- D. 01 let monthName ='July';
Answer: D
NEW QUESTION # 137
A developer wants to create an object from a function in the browser using the code below:
Function Monster() { this.name = 'hello' };
Const z = Monster();
What happens due to lack of the new keyword on line 02?
- A. The z variable is assigned the correct object but this.name remains undefined.
- B. Window.m is assigned the correct object.
- C. The z variable is assigned the correct object.
- D. Window.name is assigned to 'hello' and the variable z remains undefined.
Answer: D
NEW QUESTION # 138
A developer is setting up a new Node.js server with a client library that is built using events and callbacks.
The library:
● Will establish a web socket connection and handle receipt of messages to the server
● Will be imported with require, and made available with a variable called we.
The developer also wants to add error logging if a connection fails.
Given this info, which code segment shows the correct way to set up a client with two events that listen at execution time?
- A. ws.on ('connect', ( ) => { console.log('connected to client'); }}; ws.on('error', (error) => { console.log('ERROR' , error); }};
- B. try{
ws.connect (( ) => {
console.log('connected to client'); }); - C. ws.connect (( ) => {
console.log('connected to client'); }).catch((error) => { console.log('ERROR' , error); }}; - D. ws.on ('connect', ( ) => {
console.log('connected to client'); ws.on('error', (error) => { console.log('ERROR' , error); });
});
Answer: A
Explanation:
} catch(error) { console.log('ERROR' , error); };
}
NEW QUESTION # 139
A developer publishes a new version of a package with new feature that do not break backward compatibility. The previous version number was 1.1.3.
Following semantic versioning format, what should the new package version number be?
- A. 1.2.3
- B. 1.1.4
- C. 1.2.0
- D. 2.0.0
Answer: C
NEW QUESTION # 140
A developer has a server running with Node.js. the command to start the web server is node server.js. the 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. DEBUO=http, https node server,js
- B. NODE_DEBUO=true node server,js
- C. NODE_DEBUO=http, https node server,js
- D. DEBUO=true node server,js
Answer: A
NEW QUESTION # 141
Which statement parses successfully?
- A. JSON.parse ("foo");
- B. JSON.parse ("foo");
- C. JSON. parse (""foo"');
- D. JSON.parse (""foo'");
Answer: C
NEW QUESTION # 142
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;
- B. Let arr2 = Array.from(arr1);
- C. Let arr2 = arr1.sort();
- D. Let arr2 = arr1.slice(0, 5);
Answer: B,D
NEW QUESTION # 143
Which statement can a developer apply to increment the browser's navigation history without a page refresh?
Which statement can a developer apply to increment the browser's navigation history without a page refresh?
- A. window.history.pushStare(newStateObject, ' ', null);
- B. window.history.replaceState(newStateObject,' ', null);
- C. window.history.pushState(newStateObject);
- D. window.history.state.push(newStateObject);
Answer: B
NEW QUESTION # 144
Refer to the code:
Given the code above, which three properties are set for pet1? Choose 3 answers
- A. size
- B. canTalk
- C. type
- D. owner
- E. name
Answer: A,B,C
NEW QUESTION # 145
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 Hello, Hello.
- C. Greeting is Hello and salutation is I say hello.
- D. Greeting is Goodbye and salutation is Hello, Hello.
Answer: B
NEW QUESTION # 146
A developer copied a JavaScript object:
How does the developer access dan's forstName,lastName? Choose 2 answers
- A. dan,firstname ( ) + dan, lastName ( )
- B. dan, firstName =dan.lastName
- C. dan,name
- D. dan,name ( )
Answer: B,D
NEW QUESTION # 147
A developer writes the code below to calculate the factorial of a given number.
What is the result of executing line 04?
- A. 0
- B. 1
- C. RuntimeError
- D. -Infinity
Answer: C
NEW QUESTION # 148
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