AD0-E724 Free Practice Test

In a new release of a module, a developer decides to rename a table that was defined in the earlier versions. Which action, if any, allows the developer to prevent data loss?

1. A. Define onCreate="migrateDataFromAnotherTable(old_table_name)" attribute in the table tag.
2. B. Declarative schema supports RENAME TABLE', so the data will be migrated to the new table automatically.
3. C. Define the table and columns mapping in the db.schema_whitelist.json

Correct Answer: C
When renaming a table in Magento, to prevent data loss, the developer must define the table and its columns mapping in thedb_schema_whitelist.jsonfile. This declarative schema approach ensures that the data migration tool knows about the changes and can migrate data from the old table to the newly named table without losing any data.

An Adobe Commerce developer has added an iframe and included a JavaScript library from an external domain to the website. After that, they found the following error in the console:
Refused to frame [URL] because it violates the Content Security Policy directive.
In order to fix this error, what would be the correct policy ids to add to the csp_whitelist.xml file?

1. A. frame-src and script-src
2. B. default-src and object-src
3. C. frame-ancestors and connect-src

Correct Answer: A
The Content Security Policy (CSP) in Adobe Commerce (Magento) restricts the types of content that can be loaded on a page to protect against malicious attacks, such as cross-site scripting (XSS). When an iframe is added, and a JavaScript library is loaded from an external source, these resources must be whitelisted explicitly using the csp_whitelist.xml file.
In this specific case:
✑ The frame-src directive controls the sources from which iframes can be embedded. Since the developer is embedding an iframe from an external domain, they need to whitelist this domain for frame-src.
✑ The script-src directive controls the sources from which JavaScript files can be loaded. The external JavaScript library must be whitelisted under script-src to allow it to execute.
Therefore, the correct policy IDs to whitelist are:
✑ frame-src: to allow the embedding of content from an external domain in an iframe.
✑ script-src: to allow the loading and execution of JavaScript files from the external domain.
Here??s how to update the csp_whitelist.xml file with the correct directives:
<?xml version="1.0"?>












Replace your-external-domain.com with the actual domain of the external iframe and JavaScript source.
Additional Resources:
✑ Adobe Commerce Developer Guide: Content Security Policy (CSP)
✑ CSP Policies and Directives: Explanation of all supported CSP directives and how to configure them.

An Adobe Commerce developer has added a new configuration field to the admin area. The path for this option is general/store_information/out_of_hours_phone.
Keeping simplicity in mind, how would the developer ensure this option contains a valid US telephone number?

1. A. Add <validate>phoneUS</validate> to the field in system.xml.
2. B. Create a backend model to check the validity of the phone number entered.
3. C. Add to the field in system.xml.

Correct Answer: A
According to the Magento Stack Exchange answer, system.xml is a file that defines the configuration fields for the admin area. Each field can have a validate attribute that specifies a validation rule for the field value. Magento provides some built-in validation rules, such as phoneUS, which validates a US telephone number. Therefore, to ensure that the option contains a valid US telephone number, the developer needs to add
phoneUS to the field in system.xml. Verified References:https://magento.stackexchange.com/questions/104570/magento-2-system-xml- validation-rules
When adding a new configuration field to the admin panel and needing to ensure it contains a valid US telephone number, you can leverage Magento??s built-in validation options within the system.xml configuration file. The correct approach is to use the
tag with the desired validation type.
✑ Built-in Validation with system.xml:
✑ uk.co.certification.simulator.questionpool.PList@52a60aaa
✑ Using phoneUS:
✑ Why Option A is Correct:
✑ Example system.xml Configuration:

Out of Hours Phone
phoneUS
<comment>Enter a valid US phone number
:
Magento DevDocs onConfiguration Validation
Adobe Commerce Guide onAdmin Configuration Fields

An Adobe Commerce developer has been asked to modify the PageBuilder slider content type to allow a new custom content type (other than slide) to be assigned as a child. The developer has already created the new content type called improved_slide in their module. They now need to create a new view/adminhtml/pagebuilder/content_type/slider. xml file in their module to allow the new content type to be a child of slider content types.
What is the correct xml to accomplish this?
A)

B)

C)

1. A. Option A
2. B. Option B
3. C. Option C

Correct Answer: C
The correct answer is Option C. This XML configuration is the correct way to define allowed child content types for a slider content type in Magento's PageBuilder.
Magento PageBuilder Content Type Structure:
In PageBuilder, each content type can specify which other content types are allowed as children.
This is done by defining the allowed_children array within the content type??s XML configuration.
Analyzing Option C:
Arguments Definition: Option C uses the node to define a new argument named allowed_children.
Array Structure: This argument is an array (xsi:type="array") that includes an item specifying the improved_slide as an allowed child with xsi:type="string".
This configuration is correct because it explicitly defines which child content types are allowed for the slider content type, adhering to Magento??s structure for allowed child
elements in PageBuilder.
Why Options A and B are Incorrect:
Option A: Uses a node with policy="allow", which is not the standard way to define allowed children for PageBuilder content types. This format is incorrect and won??t be recognized by PageBuilder.
Option B: Uses , which also doesn??t align with the way Magento??s PageBuilder expects child content types to be declared. The correct term is allowed_children, not allowed_descendants.
References:
Magento PageBuilder Development Guide - This guide provides insights into customizing PageBuilder and managing content types.
Configuring Content Types in PageBuilder - Documentation on how to define allowed children for custom content types.
Adobe Commerce PageBuilder Content Types XML Reference - Details on the correct XML structure for PageBuilder content types.
Option C??s configuration aligns with Adobe Commerce PageBuilder??s structure for defining which content types can be nested within another, making it the correct choice.

An Adobe Commerce developer is tasked with adding an new export option for the order grid, they have added the following code for the export button within sales_order_grid.xml:

Upon testing, they are getting redirected, what would be a cause for this error?

1. A. The option's uri attribute is not valid.
2. B. The layout cache needs to be refreshed.
3. C. The developer has to add a formkey for the new export option.

Correct Answer: C
The developer has to add a formkey for the new export option because the formkey is required for security reasons. Without the formkey, the request will be rejected and redirected to the dashboard page. Verified References: [Magento 2.4 User Guide] [Magento 2.4 DevDocs]
When adding custom export options to grids in Magento, it's crucial to include a form key for actions that involve form submission. Magento relies on form keys for CSRF (Cross-Site Request Forgery) protection, so omitting the form key can lead to redirects or failed operations.
✑ Form Key Requirement:
✑ uk.co.certification.simulator.questionpool.PList@755b4fcf
✑ Why Option C is Correct:
✑ Solution:
: Adobe Commerce documentation onForm Key and CSRF Protection Magento DevDocs onAdding Buttons to Grids