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| Certification Vendor: | Salesforce |
|---|---|
| Exam Name: | Salesforce Certified JavaScript Developer I |
| Exam Number: | JS-Dev-001 |
| Exam Format: | Multiple Choice, Multiple Select |
| Passing Score: | 65% |
| Related Certifications: | Salesforce Certified JavaScript Developer I Salesforce Certified Platform App Builder Salesforce Certified Platform Developer I |
| Exam Duration: | 105 minutes |
| Available Languages: | English |
| Exam Price: | USD 200 (may vary by region/tax) |
| Certificate Validity Period: | 1 year (maintenance required via Salesforce certification maintenance modules) |
| Real Exam Qty: | 60 |
| Recommended Training: | Salesforce Developer Learning Paths Salesforce Trailhead JavaScript Developer I Prep |
| Exam Registration: | Salesforce Certification Registration (Webassessor) Salesforce Credentials Page |
| Sample Questions: | Salesforce JavaScript-Developer-I Sample Questions |
| Exam Way: | Online proctored or onsite testing via Kryterion Webassessor |
| Pre Condition: | No formal prerequisites, but familiarity with JavaScript and Salesforce platform development is strongly recommended. |
| Official Syllabus URL: | https://trailhead.salesforce.com/credentials/javascriptdeveloper1 |
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By earning the Salesforce Certified JavaScript Developer I certification, individuals can demonstrate their expertise in developing custom applications on the Salesforce platform using JavaScript. Salesforce Certified JavaScript Developer (JS-Dev-101) certification can enhance a developer’s career opportunities and make them a more valuable asset to their organization. Additionally, Salesforce Certified JavaScript Developer I certification holders are recognized by the industry as experts in the field and are listed on Salesforce’s official website as certified professionals.
NEW QUESTION # 12
A developer wants to use a module called DatePrettyPrint.
This module exports one default function called printDate().
How can the developer import and use printDate()?
Answer: D
Explanation:
ES Modules follow these rules:
* Default exports are imported using:
* import anyName from ' module '
The name chosen in the import does NOT need to match the exported name.
* If a module exports:
* export default function printDate() {}
then consuming code should import the function directly:
import printDate from ' /path/DatePrettyPrint.js ' ;
* To execute it:
* printDate();
Option analysis:
* A incorrect: import DatePrettyPrint() is invalid syntax. Also calling printDate() without importing it is incorrect.
* B incorrect: A default export imported as DatePrettyPrint gives the function itself, not an object containing methods. You cannot call DatePrettyPrint.printDate().
* C incorrect: Imports printDate but then calls DatePrettyPrint.printDate(), which does not exist.
* D correct: Correct import of a default-exported function. Correct direct invocation.
JavaScript Knowledge References (text-only)
* Default export # imported without braces.
* Importing default functions gives a callable function, not an object.
* Correct syntax: import identifier from " module " .
NEW QUESTION # 13
A developer needs to debug a Node.js web server because a runtime error keeps occurring at one of the endpoints.
The developer wants to test the endpoint on a local machine and make the request against a local server to look at the behavior. In the source code, the server.js file will start the server. The developer wants to debug the Node.js server only using the terminal.
Which command can the developer use to open the CLI debugger in their current terminal window?
(With corrected typing errors: node_inspect # node inspect, node_start_inspect # node start inspect.)
Answer: C
NEW QUESTION # 14
A developer at Universal Containers is creating their new landing page based on HTML, CSS, and JavaScript.
To ensure that visitors have a good experience, a script named personalizeWebsiteContent needs to be executed when the webpage is fully loaded (HTML content and all related files), in order to do some custom initializations.
Which implementation should be used to call Fe:s:-a;::eHec5;te::.-.ter.: based on the business requirement above?
Answer: C
NEW QUESTION # 15
A class was written to represent regular items and sale items. Code:
01 let regItem = new Item( ' Scarf ' , 55);
02 let saleItem = new SaleItem( ' Shirt ' , 80, .1);
03 Item.prototype.description = function() { return ' This is a ' + this.name; }
04 console.log(regItem.description());
05 console.log(saleItem.description());
06
07 SaleItem.prototype.description = function() { return ' This is a discounted ' + this.name; }
08 console.log(regItem.description());
09 console.log(saleItem.description());
What is the output?
Answer: D
Explanation:
* At line 03, the developer assigns:
Item.prototype.description = function() { return ' This is a ' + this.name; } This affects all objects whose prototype chain includes Item.prototype .
* regItem inherits from Item # gets this method.
* saleItem, as an instance of SaleItem, also inherits Item.prototype (since SaleItem uses prototype inheritance from Item), so it also has this method at this moment.
Outputs at lines 04 and 05:
* regItem.description() # " This is a Scarf "
* saleItem.description() # " This is a Shirt "
* At line 07, the developer overrides the method on SaleItem.prototype :
SaleItem.prototype.description = function() {
return ' This is a discounted ' + this.name;
}
From this point:
* regItem still uses the Item.prototype version
* saleItem uses the overridden SaleItem.prototype version
Outputs at lines 08 and 09:
* regItem.description() # " This is a Scarf "
* saleItem.description() # " This is a discounted Shirt "
Combining all results:
This is a Scarf
This is a Shirt
This is a Scarf
This is a discounted Shirt
This matches option B .
JavaScript Knowledge References (text-only)
* Objects created from constructor functions use prototype chaining.
* Overriding a subclass prototype method does not affect the parent class prototype.
* Instances inherit the most specific version of the method on their prototype chain.
NEW QUESTION # 16
A test searches for:
< button class= " blue " > Checkout < /button >
But the actual HTML is:
< button > Checkout < /button >
The test fails because it expects a class that no longer exists.
What type of test outcome is this?
Answer: A
Explanation:
Definitions:
* False negative # The test reports a failure even though the feature actually works.
* False positive # The test reports success when it should not.
* True positive # Correctly identifies something is working.
* True negative # Correctly identifies something is not working.
In this scenario:
* The checkout button does exist , so the feature works.
* The test fails incorrectly , because it is checking for the wrong selector.
That is the definition of a false negative .
JavaScript Knowledge References (text-only)
* Test outcome classification: false negative = feature works but test fails.
NEW QUESTION # 17
......
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