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Download Salesforce Certified JavaScript Developer I Exam Exam Dumps

NEW QUESTION 49
The developer wants to test the array shown:
Const arr = Array (5) . fill (0);
Which two test are the most accurate for this array? Choose 2 answers

• A. Console,assert(arr(0) === 0 $$ arr (arr .longth ) === 0) ;
• B. Arr. forEach (elem => console .assert (elem === 0) );
• C. Console. Assert (arr. Length > 0) ;
• D. Console,assert(arr.length === 5) ;

Answer: B

NEW QUESTION 50
Which statement can a developer apply to increment the browser's navigation history without a page refesh?

• A. Window.history,state,push.(newStateObject);
• B. Window.history,state,push.(newStateObject, ' ' null;
• C. Window.history,pushState.(newStateObject);
• D. Window.history,pushState.(newStateObject, ' ', null)) ;

Answer: B

NEW QUESTION 51
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 Dan Doe
• B. TypeError: dan.name is not a function
• C. Hello John DOe
• D. TypeError: Assignment to constant variable.

Answer: B

NEW QUESTION 52
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. 02 const year = 2020;
• B. 01 let monthName ='July';
• C. 03 if (year == 2019) {
• D. 02 let year =2019;

Answer: B

NEW QUESTION 53
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. npm start server,js
• B. node start
• C. npm start
• D. start server,js

Answer: C

NEW QUESTION 54
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