Provide Valid JavaScript-Developer-I Dumps To Help You Prepare For Salesforce Certified JavaScript Developer I Exam Exam Nov 18, 2023
Salesforce JavaScript-Developer-I Dumps Questions [2023] Pass for JavaScript-Developer-I Exam
By earning the Salesforce Certified JavaScript Developer I certification, individuals can demonstrate their expertise in developing custom applications on the Salesforce platform using JavaScript. Salesforce Certified JavaScript Developer I Exam certification can enhance a developer’s career opportunities and make them a more valuable asset to their organization. Additionally, Salesforce Certified JavaScript Developer I certification holders are recognized by the industry as experts in the field and are listed on Salesforce’s official website as certified professionals.
NEW QUESTION # 45
At Universal Containers, every team has its own way of copying JavaScript objects. The code Snippet shows an implementation from one team:
Function Person() {
this.firstName = "John";
this.lastName = 'Doe';
This.name =() => (
console.log('Hello $(this.firstName) $(this.firstName)');
)}
Const john = new Person ();
Const dan = JSON.parse(JSON.stringify(john));
dan.firstName ='Dan';
dan.name();
What is the Output of the code execution?
- A. Hello John DOe
- B. Hello Dan Doe
- C. TypeError: dan.name is not a function
- D. TypeError: Assignment to constant variable.
Answer: C
NEW QUESTION # 46
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: B
NEW QUESTION # 47
Refer to the following array:
Let arr = [1, 2, 3, 4, 5];
Which three options result in x evaluating as [1, 2]?
Choose 3 answer
- A. let x = arr. slice (0, 2);
- B. let x = arr. slice (2);
- C. let x = arr.filter ((a) => 2 }) ;
- D. let x =arr.splice(0, 2);
- E. let x arr.filter((a) => (return a <= 2 });
Answer: A,D,E
NEW QUESTION # 48
Refer to code below:
Const objBook = {
Title: 'Javascript',
};
Object.preventExtensions(objBook);
Const newObjBook = objBook;
newObjectBook.author = 'Robert';
What are the values of objBook and newObjBook respectively ?
- A. {author: "Robert", title: "javaScript}
{author: "Robert", title: "javaScript} - B. {author: "Robert"}
{author: "Robert", title: "javaScript} - C. [title: "javaScript"] [title: "javaScript"]
- D. {author: "Robert", title: "javaScript}
Undefined
Answer: C
NEW QUESTION # 49
A developer creates a generic function to log custom messages in the console. To do this, the function below is implemented.
01 function logStatus(status){
02 console./*Answer goes here*/{'Item status is: %s', status};
03 }
Which three console logging methods allow the use of string substitution in line 02?
- A. Assert
- B. Log
- C. Message
- D. Info
- E. Error
Answer: A,B,D
NEW QUESTION # 50
Refer to the code below:
What is display when the cod executes?
- A. A
- B. Undefined
- C. ReferenceError: b is not defined
- D. null
Answer: A
NEW QUESTION # 51
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. NODE_DEBUG=true node server.js
- C. DEBUG=http, https node server.js
- D. DEBUG=true node server.js
Answer: D
NEW QUESTION # 52
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.groupCol lapsed (usersList) ;
- B. console.group(usersList) ;
- C. console.table(usersList) ;
- D. console.info(usersList) ;
Answer: B
NEW QUESTION # 53
developer publishes a new version of a package with new features 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. 1.2.0
- C. 1.1.4
- D. 2.0.0
Answer: B
NEW QUESTION # 54
What are two unique features of functions defined with a fat arrow as compared to normal function definition?
Choose 2 answers
- A. The function uses the this from the enclosing scope.
- B. The function receives an argument that is always in scope, called parentThis, which is the enclosing lexical scope.
- C. The function generated its own this making it useful for separating the function's scope from its enclosing scope.
- D. If the function has a single expression in the function body, the expression will be evaluated and implicit returned.
Answer: B,C
NEW QUESTION # 55
Which option is a core Node;js module?
- A. Memory
- B. Ios
- C. Path
- D. locale
Answer: B,C
NEW QUESTION # 56
Refer to the code below:
Async funct on functionUnderTest(isOK) {
If (isOK) return 'OK' ;
Throw new Error('not OK');
)
Which assertion accuretely tests the above code?
- A. Console.assert (await functionUnderTest(true), 'OK')
- B. Console.assert (await functionUnderTest(true), ' not OK ')
- C. Console.assert (await functionUnderTest(true), ' OK ')
- D. Console.assert (await functionUnderTest(true), ' not OK ')
Answer: A
NEW QUESTION # 57
Refer to code below:
Let a ='a';
Let b;
// b = a;
console.log(b);
What is displayed when the code executes?
- A. Undefined
- B. Null
- C. ReferenceError: b is not defined
- D. A
Answer: A
NEW QUESTION # 58
Which statement accurately describes the behaviour of the async/ await keyworks ?
- A. The associated function will always return a promise
- B. The associated function can only be called via asynchronous methods
- C. The associated sometimes returns a promise.
- D. The associated class contains some asynchronous functions.
Answer: C
NEW QUESTION # 59
A developer is working on an ecommerce website where the delivery date is dynamically calculated based on the current day. The code line below is responsible for this calculation.
Const deliveryDate = new Date ();
Due to changes in the business requirements, the delivery date must now be today's date + 9 days.
Which code meets this new requirement?
- A. deliveryDate.date = new Date(+9) ;
- B. deliveryDate.setDate(( new Date ( )).getDate () +9);
- C. deliveryDate.setDate( Date.current () + 9);
- D. deliveryDate.date = Date.current () + 9;
Answer: B
NEW QUESTION # 60
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