Adobe AD0-E720 Adobe Commerce Front-End Developer Expert Exam Practice Test

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Total 50 questions
Question 1

An Adobe Commerce developer was asked to customize a JavaScript component which is written as a function. How would the developer extend the native JavaScript function?

A)

B)

C)



Answer : A

To customize a JavaScript component that is written as a function, the developer can use option A. This option will use the prototype property of the function to extend its functionality and add new methods or properties. For example:

function Component() { // Component logic }

Component.prototype.customMethod = function() { // Custom method logic };

This will create a new method called customMethod on the prototype of the Component function, which can be accessed by any instance of the Component object. The developer can also override existing methods or properties on the prototype by reassigning them with new values.

Option B is not correct because it will not extend the native JavaScript function, but create a new function that wraps the original function. This will not allow the developer to access or modify the properties or methods of the original function. Option C is not correct because it will not extend the native JavaScript function, but create a new object that inherits from the original function. This will not allow the developer to customize the original function itself, but only its instances.


Question 2

An Adobe commerce developer wants to initialize a JavaScript component using a data attribute. Which option would initialize the JavaScript component?



Answer : C

To initialize a JavaScript component using a data attribute, the developer should use the data-mage-init attribute. This attribute allows the developer to specify the name and configuration of the component in a JSON format. For example:

<nav data-mage-init='{''Vendor_Module/js/nav'': {''option1'': ''value1'', ''option2'': ''value2''}}'></nav>

This will initialize the nav component from the Vendor_Module/js/nav file with the given options. The data-bind and data-init attributes are not valid and will not work, as they are not supported by Magento. Reference: [JavaScript initialization], [data-mage-init]


Question 3

An Adobe Commerce developer wants to apply a knockout binding to a

to run a function, onClick(), when it's clicked. Which two solutions would the developer use to achieve this? (Choose two.)

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Total 50 questions