2023 Salesforce Marvelous JavaScript-Developer-I: Salesforce Certified JavaScript Developer I Exam Latest Exam Materials

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NEW QUESTION 44
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 . date = date . current () + 9
  • B. deliveryDate. setDate ( Date . current () + 9 0;
  • C. deliveryDate. setDate (( new Date ()) .getDate () + 9);
  • D. deliveryDate. Date = new Date (+9) ;

Answer: C

NEW QUESTION 45
Refer to the code below:

What is the value of result when the code executes?

  • A. 5-10
  • B. 5-5
  • C. 10-5
  • D. 10-10

Answer: D

NEW QUESTION 46
A developer is required to write a function that calculates the sum of elements in an
array but is getting undefined every time the code is executed. The developer needs to find
what is missing in the code below.
Const sumFunction = arr = {
Return arr.reduce((result, current) = {
//
Result += current;
//
), 10);
);
Which option makes the code work as expected?

  • A. Replace line 03 with if(arr.length == 0 ) ( return 0; )
  • B. Replace line 05 with return result;
  • C. Replace line 04 with result = result +current;
  • D. Replace line 02 with return arr.map(( result, current) = (

Answer: B

NEW QUESTION 47
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. Black box
  • B. White box
  • C. Stubbing
  • D. Substitution

Answer: B,D

NEW QUESTION 48
Which code statement correctly retrieves and return an object from localStorage?
A)

B)

C)

D)

  • A. Option C
  • B. Option A
  • C. Option D
  • D. Option B

Answer: C

NEW QUESTION 49
......

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