[Nov-2021] The Best Salesforce Developer Study Guide for the JavaScript-Developer-I Exam
JavaScript-Developer-I certification guide Q&A from Training Expert PrepPDF
NEW QUESTION 49
A developer is working on an ecommerce website where the delivery date is dynamically calculated based on the current dat. 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 requirements?
- A. deliveryDate. setDate (( new Date ()) .getDate () + 9);
- B. deliveryDate. setDate ( Date . current () + 9 0;
- C. deliveryDate. Date = new Date (+9) ;
- D. deliveryDate . date = date . current () + 9
Answer: A
NEW QUESTION 50
A developer is leading the creating of a new browser application that will server a single page application. The team wants to use a new web framework Minialist.js. The lead developer wants to advocate for a more seasoned wen framework that already has a community around it.
Which two frameworks should the load developer advocate for?
- A. Vue
- B. Express
- C. Koa
- D. Angular
Answer: B,D
NEW QUESTION 51
Refer to the code below:
After running this code, which result is displayed on the console?
- A. > 5
>- 1 - B. > 5
> Undefined - C. > 5
> 0 - D. > True
> False
Answer: A
NEW QUESTION 52
Given the code below:
What is logged to the console?
- A. 2 1 4 3 5
- B. 1 2 5 3 4
- C. 1 2 4 3 5
- D. 2 5 1 3 4
Answer: D
NEW QUESTION 53
Given a value, which three options can a developer use to detect of the value is NaN?
Choose 3 answers
- A. Object , is ( value, NaN)
- B. Value I== value
- C. Number , isNaN(value)
- D. Value == Number, NaN
- E. Value == NaN
Answer: A,C,E
NEW QUESTION 54
Refer to the code below:
What are the values for first and second once the executes?
- A. First is who and second is where.
- B. First is why and second is where.
- C. First is who and second is when.
- D. First is why and second is when.
Answer: B
NEW QUESTION 55
Refer to the code below:
Which code change should be made for the console to log only Row log when 'Click mel' is clicking?
- A. Add event,stopPropagation (); to window,onLoad event hadler.
- B. Add event,stopPropagation (); to printMessage function.
- C. Add event,stopPropagation (); to window.onLoad event hadler.
- D. Add event,stopPropagation (); to printMessage function.
Answer: B,C
NEW QUESTION 56
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 57
Refer to the code:
Given the code above, which three properties are set for pet1? Choose 3 answers
- A. owner
- B. speak
- C. canTalk
- D. type
- E. name
Answer: C,D,E
NEW QUESTION 58
Refer to the following code:
What will the console when the button is clicked?
- A. Inner message
- B. Inner message
- C. Outer message
- D. Outer message
Answer: D
NEW QUESTION 59
In which situation should a developer include a try... catch block around their function call?
- A. The function has an error that should not be silenced.
- B. The function contains scheduled code.
- C. The function might raise a runtime error that needs to be handled.
- D. The function results in an out of memory issue.
Answer: C
NEW QUESTION 60
Refer to the code below:
What is display when the cod executes?
- A. Undefined
- B. ReferenceError: b is not defined
- C. null
- D. A
Answer: D
NEW QUESTION 61
The developer wants to test the code:
Const toNumber = (strOrNum) => + strOrNum;
Which two tests are most accurate for this code? Choose 2 answers
- A. Console. Assert (Number,isNaN (toNumber ( ) ));
- B. Console.assert (toNumber ('2') === 2 ) ;
- C. Console,assert (toNumber ( ) === NaN ) ;
- D. Console,assert (toNumber ( '-3') < 0);
Answer: B,C
NEW QUESTION 62
A test has a dependency on database. query. During the test, the dependency is replaced with an object called database with the method, Calculator query, that returns an array. The developer does not need to verify how many times the method has been called.
Which two test approaches describe the requirement?
Choose 2 answers
- A. Stubbing
- B. White box
- C. Black box
- D. Substitution
Answer: B,D
NEW QUESTION 63
Refer to the code below:
new Promise((resolve, reject) => {
const fraction = Math.random();
if( fraction >0.5) reject("fraction > 0.5, " + fraction);
resolve(fraction);
})
.then(() =>console.log("resolved"))
.catch((error) => console.error(error))
.finally(() => console.log(" when am I called?"));
When does Promise.finally on line 08 get called?
- A. WHen resolved
- B. When rejected
- C. When resolved or rejected
- D. When resolved and settled
Answer: C
NEW QUESTION 64
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How much Salesforce JavaScript-Developer-I Exam Cost
The price of the Salesforce JavaScript Developer I certification is $200 USD, for more information related to the Salesforce JavaScript-Developer-I Exam please visit Salesforce website.
For more info read reference:
Salesforce JavaScript-Developer-I Certification leaning site Salesforce JavaScript-Developer-Is Certification resources
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).
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JavaScript-Developer-I Certification Overview Latest JavaScript-Developer-I PDF Dumps: https://drive.google.com/open?id=1-5g7i23u3bE_yozV9zNuMtlUZ2Q70hh2