[Nov 04, 2021] JavaScript-Developer-I Exam Dumps PDF Guaranteed Success with Accurate & Updated Questions
Pass JavaScript-Developer-I Exam - Real Test Engine PDF with 160 Questions
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.
How to Prepare for Salesforce JavaScript Developer I Exam
Preparation Guide for Salesforce JavaScript Developer I Exam
Introduction
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NEW QUESTION 56
A team that works on a big project uses npm to deal with projects dependencies.
A developer added a dependency does not get downloaded when they execute npm install.
Which two reasons could be possible explanations for this?
Choose 2 answers
- A. The developer missed the option --add when adding the dependency.
- B. The developer added the dependency as a dev dependency, and NODE_ENV is set to production.
- C. The developer missed the option --save when adding the dependency.
- D. The developer added the dependency as a dev dependency, and NODE_ENV Is set to production.
Answer: B,C,D
NEW QUESTION 57
Given the following code:
What is the logged by the first four log statements?
- A. 0 1 1 2
- B. 0 0 1 2
- C. 0 1 2 2
- D. 0 1 2 3
Answer: A
NEW QUESTION 58
In the browser, the window object is often used to assign variables that require the broadcast scope in an application Node is application do not have access to the window object by default.
Which two methods are used to address this? Choose 2 answer
- A. Use the document instead of the window object.
- B. Create a new window object in the root file.
- C. Assign variables to module, exports and require them as needed.
- D. Assign variables to the global object.
Answer: A,B
NEW QUESTION 59
Refer to the code below:
What is the output after the ode executes successfully?
- A. Start
End
Success - B. Start
Success
End - C. Success
Start
End - D. End
Start
Success
Answer: B
NEW QUESTION 60
A developer has an ErrorMandler module that contains multiple functions.
What kind of export should be leveraged so that multiple function can be used?
- A. Named
- B. Multi
- C. default
- D. All
Answer: A
NEW QUESTION 61
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 62
Refer to the code below:
Const pi w 3.1415926;
What is the data type of pi?
- A. Double
- B. Float
- C. Number
- D. Decimal
Answer: C
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
Which three browser specific APIs are available for developer to persist data between page loads?
Choose 3 answers
- A. localStorage
- B. indexedDB
- C. global variables
- D. cookies
- E. IIFEs
Answer: A,B,E
NEW QUESTION 65
A developer uses a parsed JSON string to work with user information as in the block below:
Which two option access the email attributes in the object? Choose 2 answers
- A. userInformation(email)
- B. userInformation. email
- C. userInformation. Get (''email'')
- D. userInformation ( ''email'' )
Answer: B,D
NEW QUESTION 66
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.
Which option makes the code work as expected?
- A. Replace line 03 with if 9 (arr. Length == 0) ( return 0; )
- B. Replace line 04 with result + current ;
- C. Replace line 05 with return results;
- D. Replace line 02 with return arr. map ( (result, current => (
Answer: C
NEW QUESTION 67
A developer creates an object where its properties should be immutable and prevent properties from being added or modified.
Which method should be used to execute this business requirement?
- A. Object. Lock ( )
- B. Object. filebase ( )
- C. Object. real ( )
- D. Object const ( )
Answer: B
NEW QUESTION 68
Given the HTML below:
Which statement adds the priority-account CSS class to the Unversal Containers row?
- A. Document. queryselector ('# row-uc') ,classes. Push (' priority-account');
- B. Document. querySelector ( 'row-uc') . classList. Add ( 'pariority-account') ;
- C. Document. querySelectorAll ( '# row-uc ') .classList. add ('priority-account');
- D. Document. getElementById ( 'row-uc') addClass ( ' priority-account');
Answer: B
NEW QUESTION 69
Given two expressions var1 and var2, what are two valid ways to return the logical AND of the two expression and ensure it is data type Boolean? Choose 2 answers
- A. Boolean (var1) && Boolean (var2)
- B. Var1 && var2
- C. Var1. Toboolean ( ) && var2, to Boolean ( )
- D. Boolean (var1 && var2)
Answer: C,D
NEW QUESTION 70
Which two console logs out NaN?
Choose 2 answers
- A. Console.log(10 / Number ('5) );
- B. Console.log(parseint ('two') ) ;
- C. Console.log(10 / 'five' ') ;
- D. Console.log (10 / 0);
Answer: B,C
NEW QUESTION 71
Refer to the code below:
Line 05 causes an error.
What are the values of greeting and salutation once code completes?
- A. Greeting is Goodbye and salutation is I say Hello.
- B. Greeting is Hello and salutation is Hello, Hello.
- C. Greeting is Goodbye and salutation is Hello, Hello.
- D. Greeting is Hello and salutation is I say hello.
Answer: B
NEW QUESTION 72
A test has a dependency on database .query. During the test the dependency is replace with an called database with the method, query, that returns an array. The developer needs to verify how many times the method was called and the arguments used each time.
Which two test approaches describe the requirement?
- A. White box
- B. Mocking
- C. Black box
- D. Integration
Answer: A,D
NEW QUESTION 73
Which statement parses successfully?
- A. JSON.parse ("foo");
- B. JSON.parse (""foo'");
- C. JSON. parse (""foo"');
- D. JSON.parse ("foo");
Answer: C
NEW QUESTION 74
A developer wants to set up a secure web server with Node.js. The developer create a directory locally called app-server, and the first file is app-server/index, js.
Without using any third-party libraries, what should the developer add to index, js to create the secure web server?
- A. Const http = require ('http');
- B. Const http = require ('https') ;
- C. Const tls = require ('tls') ;
- D. Const server = require ( 'secure-server') ;
Answer: B
NEW QUESTION 75
Refer to the code snippet:
What is the value of array after the code executes?
- A. 1, 2, 3, 4, 5, 4, 4
- B. 1, 2, 3, 5
- C. 1, 2, 3, 4, 4, 5, 4
- D. 1, 2, 3, 4, 5, 4
Answer: B
NEW QUESTION 76
A developer publishes a new version of a package with new feature that do not break backward compatibility. The previous version number was 1.1.3.
Following semantic versioning format, what should the new package version number be?
- A. 1.1.4
- B. 1.2.0
- C. 1.2.3
- D. 2.0.0
Answer: B
NEW QUESTION 77
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