Updated JavaScript Developer I Exam Questions - Way to Achieve Success with Valid Guide

Now you can prepare effectively and empower yourself with the most updated Salesforce JavaScript Developer I exam questions of QuestionsTube. We have collected the most updated questions and answers to confidently embark on your Salesforce Certified JavaScript Developer I certification journey. And today, we will share Salesforce JavaScript Developer I free questions online with detail explanations.

1. Which statement accurately describes the behaviour of the async/await keyworks?
A. The associated class contains some asynchronous functions.
B. The associated function will always return a promise
C. Theassociated function can only be called via asynchronous methods
D. The associated sometimes returns a promise.
Answer: D

2. A developer has an ErrorHandler module that contains multiple functions.
What kind of export be leverages so that multiple functions can beused?
A. Named
B. All
C. Multi
D. Default
Answer: A

3. Which function should a developer use to repeatedly execute code at a fixed interval?
A. setIntervel
B. setTimeout
C. setPeriod
D. setInteria
Answer: A

4. Which three actions can be using the JavaScript browser console?
A. View and change DOM the page.
B. Display a report showing the performance of a page.
C. Run code that is not related to page.
D. View, change, and debug the JavaScript code of the page.
E. View and change security cookies.
Answer: A,C,D

5. What are two unique features of functions defined with a fat arrow as compared to normal function definition?
A. The function generated its own this making it useful for separating the function's scope from its enclosing scope.
B. The function receives an argument that is always in scope, called parentThis, which is the enclosing lexical scope.
C. If the function has a single expression in the function body, the expression will be evaluated and implicit returned.
C. The function uses the this from the enclosing scope.
Answer: A,B

6. Which three browser specific APIs are available for developers to persist data between page loads?
A. IIFEs
B. indexedDB
C. Global variables
D. Cookies
E. localStorage.
Answer: A,B,E

7. A developer has an ErrorHandler module that contains multiple functions.
What kind of export should be leveraged so that multiple functions can be used?
A. all
B. named
C. multi
D. default
Answer: B

8. 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. start server,js
B. npm start server,js
C. npm start
D. node start
Answer: C

9. After user acceptance testing, the developer is asked to change the webpage background based on user's location. This change was implemented and deployed for testing.
The tester reports that the background is not changing, however it works as required when viewing on the developer's computer.
Which two actions will help determine accurate results?
A. The developer should inspect their browser refresh settings.
B. The tester should disable their browser cache.
C. The developer should rework the code.
D. The tester should dear their browser cache.
Answer: A,D

A. worker
B. isotream
C. exception
D. http
Answer: B,D