Higher Test Marks with Free Online JS-Dev-101 Exam Practice

Assess the CertsIQ’s updated JS-Dev-101 exam questions for free online practice of your Salesforce Certified JavaScript Developer - Multiple Choice test. Our Javascript-Developer-I JS Dev 101 dumps questions will enhance your chances of passing the Salesforce Certified Developer certification exam with higher marks.

Question 1

Why would a developer specify a package.jason as a developed forge instead of a dependency ?

Options :

A : It is required by the application in production.

B : It is only needed for local development and testing.

C : Other required packages depend on it for development.

D : It should be bundled when the package is published.

Answer: B

Question 2

Given the code below:const copy = JSON.stringify([ new String(' false '), new Bollean( false ), undefined ]);What is the value of copy?

Options :

A : -- [ \''false\'' , { } ]--

B : -- [ false, { } ]--

C : -- [ \''false\'' , false, undefined ]--

D : -- [ \''false\'' ,false, null ]--

Answer: D

Question 3

A developer is working on an ecommerce website where the delivery date is dynamicallycalculated 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'sdate + 9 days.Which code meets this new requirement?

Options :

A : deliveryDate.setDate(( new Date ( )).getDate () +9);

B : deliveryDate.setDate( Date.current () + 9);

C : deliveryDate.date = new Date(+9) ;

D : deliveryDate.date = Date.current () + 9;

Answer: A

Question 4

Refer to the following array:Let arr1 = [ 1, 2, 3, 4, 5 ]; Capture Which two lines of code result in a second array, arr2 being created such that arr2 is nota reference to arr1?

Options :

A : Let arr2 = arr1.slice(0, 5);

B : Let arr2 = Array.from(arr1);

C : Let arr2 = arr1;

D : Let arr2 = arr1.sort();

Answer: A,B

Question 5

Refer to the code below:let o = {get js() {let city1 = String('st. Louis');let city2 = String(' New York');return {firstCity: city1.toLowerCase(),secondCity: city2.toLowerCase(),}}}What value can a developer expect when referencing o.js.secondCity?

Options :

A : Undefined

B : ' new york '

C : ' New York '

D : An error

Answer: B