Adobe AD0-E134 Adobe Experience Manager Developer Exam Exam Practice Test

The developer should add the defaultInjectionStrategy = DefaultInjectionStrategy property to the @Model Class annotation to fix the snippet. The defaultInjectionStrategy property defines how the Sling Model handles missing or null values for the injected fields. By default, the Sling Model uses the REQUIRED injection strategy, which means that all fields must have a non-null value or else an exception is thrown. By setting the defaultInjectionStrategy property to OPTIONAL, the Sling Model allows null values for the injected fields and does not throw an exception. This way, if the page field is null because the resource is not a page, the Sling Model can still work without errors.References: https://sling.apache.org/documentation/bundles/models.html https://sling.apache.org/documentation/bundles/models.html#optional-injection

The Apache Sling Logging Logger Configuration and Apache Sling Logging Writer Configuration are the OSGi configurations that the developer should use to create a Logger and Writer pair for the company’s application logging. The Logger Configuration defines the log level and the log file name for a given logger name or category. The Writer Configuration defines the file size, number of files, and file location for a given log file name. References:https://experienceleague.adobe.com/docs/experience-manager-65/deploying/configuring/configure-logging.html?lang=en#configuring-log-files

AEM Assets HTTP API is a RESTful API that allows access to content fragments in JSON format without any customization. The API supports CRUD operations on content fragments and their variations, as well as querying and searching for content fragments based on metadata or full-text search.References:https://experienceleague.adobe.com/docs/experience-manager-65/assets/extending/assets-api-content-fragments.html?lang=en

The recommended way to make the secret key available in the AEM application is to use an environment variable which is then consumed by an OSGi configuration. This way, the secret key is not stored in the code base or in the repository, but rather in a secure and encrypted way in the Cloud Manager environment variables. The OSGi configuration can use a placeholder to reference the environment variable and inject its value at runtime. References: https://experienceleague.adobe.com/docs/experience-manager-cloud-service/implementing/deploying/configuring-osgi.html?lang=en#environment-variables https://experienceleague.adobe.com/docs/experience-manager-cloud-service/implementing/deploying/environment-variables.html?lang=en

The WorkflowProcess interface is the interface to be used for automatic workflow steps implemented in Java. Classes implementing this interface define Java based processes that can be attached to a WorkflowNode and executed by the workflow engine. The method execute takes a WorkItem, a WorkflowSession and a MetaDataMap as parameters and performs thelogic of the custom process step. References: https://developer.adobe.com/experience-manager/reference-materials/6-5/javadoc/com/adobe/granite/workflow/exec/WorkflowProcess.html https://experienceleague.adobe.com/docs/experience-manager-learn/forms/adaptive-forms/custom-process-step-aem-workflow.html?lang=en

Extend the Teaser Component from Core Components

Create style variations to be used in the Style System** Comprehensive Explanation of Correct Answer Only: The Teaser Component from Core Components is a component that allows authors to display a title, description, image and link for a teaser item. The component supports multiple designs and can be extended to add custom features or logic. The Style System allows authors to define style variations for components without requiring code changes or new templates. References: https://experienceleague.adobe.com/docs/experience-manager-core-components/using/components/teaser.html?lang=en https://experienceleague.adobe.com/docs/experience-manager-core-components/using/components/style-system.html?lang=en

Backward Compatibility with the previous AEM Version is out of scope for the Pattern Detector tool, while doing an AEM upgrade. The Pattern Detector tool is a tool that scans an existing AEM code base and identifies patterns that are incompatible with AEM as a Cloud Service or newer versions of AEM on-premise. The tool does not check for backward compatibility with older versions of AEM, as this is not a requirement for upgrading. References: https://experienceleague.adobe.com/docs/experience-manager-cloud-service/moving/cloud-migration/pattern-detector.html?lang=en https://experienceleague.adobe.com/docs/experience-manager-cloud-service/moving/cloud-migration/pattern-detector/patterns-detected.html?lang=en

When installing a package in AEM and you want to ensure that existing content in the repository is not overwritten while ensuring that content not present in the repository is not removed, you should use the update import mode.

The update import mode performs the following actions:

It updates existing content nodes in the repository with the nodes from the package being installed.

It does not remove any existing nodes or properties in the repository that are not present in the package.

It adds any new nodes or properties from the package to the repository.

This mode is particularly useful when you want to preserve any manual changes or additions that might have been made to the repository content outside of the package installations.

Here’s how you can specify the import mode during package installation:

Access Package Manager: Log into your AEM instance and navigate to the CRX Package Manager (e.g., http://localhost:4502/crx/packmgr/index.jsp).

Upload the Package: If the package is not already uploaded, click on "Upload Package" and select the package file from your local system.

Install the Package: Click on "Install" for the package you wish to install.

Choose the Import Mode: During the installation process, you will have the option to choose the import mode. Select update from the available options.

AEM Package Manager - Import Mode

Complete Installation: Proceed with the installation. The content will be updated according to the rules defined by the update import mode.

By using the update mode, you ensure that your repository content is updated without losing any existing nodes or properties that are not part of the package.

References:

Adobe Experience Manager Package Manager Documentation

AEM Import Modes

These steps ensure that you manage content updates in a controlled manner, preserving existing repository content while incorporating updates from the installed package.

When an AEM environment is cloned and the domain and IPs are changed, it is crucial to reconfigure the Transport URI of both the flush and replication agents to ensure content activation works correctly.

Here’s the step-by-step process to reconfigure these settings:

Access the AEM Tools Console: Log into your AEM instance and navigate to Tools > Deployment > Replication.

Update Replication Agents:

Go to the "Agents on author" section.

Select each replication agent (usually named "default" or based on your custom setup).

Edit the agent configuration.

Update the Transport URI to reflect the new domain and IP address.

Save the configuration.

Update Flush Agents:

Navigate to the dispatcher flush agents.

Select each flush agent.

Edit the agent configuration.

Update the Transport URI with the new domain and IP address.

Save the configuration.

Test the Configuration: After updating the URIs, test the content activation process to ensure that the replication and flushing mechanisms are working correctly with the new settings.

These steps ensure that the communication paths for content replication and cache flushing are correctly established, thereby maintaining the integrity and functionality of content activation.

References:

AEM Replication Documentation

Dispatcher Configuration Documentation

In AEM as a Cloud Service environment, the repository areas /apps and /libs are considered as immutable, meaning that they cannot be modified at runtime by any means. These areas contain application code and configuration that are deployed via Cloud Manager and are read-only for security and performance reasons. Any changes to these areas require a new deployment via Cloud Manager. References: https://experienceleague.adobe.com/docs/experience-manager-cloud-service/implementing/deploying/overview.html?lang=en#repository-restrictions https://experienceleague.adobe.com/docs/experience-manager-cloud-service/implementing/developing/aem-project-content-package-structure.html?lang=en#repository-restrictions

The correct tool to use for looking up Adobe Identity Management System (IMS) users by email and returning their IMS IDs is the IMS Lookup Tool. This tool is specifically designed to interact with the Adobe Identity Management System (IMS) and provides functionality to search for user details using various criteria such as email addresses.

Steps to use the IMS Lookup Tool:

Access the IMS Lookup Tool: Navigate to the IMS Lookup Tool interface. This tool is typically available through the Adobe Admin Console or as a part of Adobe's suite of administrative tools.

Authenticate: Ensure that you have the necessary permissions to use the tool. Authentication may be required, often through your Adobe ID and associated admin privileges.

Search by Email: Enter the email address of the user you want to look up in the search field.

Retrieve IMS ID: The tool will return the IMS ID associated with the provided email address.

This tool is essential for managing user identities and integrating with various Adobe services that rely on IMS for authentication and authorization.

References:

Adobe IMS Documentation

Adobe Admin Console

A proxy component is a site-specific component that inherits from a core component and allows customization of the component name, group, dialog, and behavior. A proxy component can refer to any version of the core component by changing the sling:resourceSuperType property. A custom sling model can be used to implement the logic for adding the page title as prefix to the text property. A component template can be used to define the layout of the component.

To ensure that text pasted inside the Text component in AEM is stripped of all styling and formatting, you need to override the RTE (Rich Text Editor) plugin implementation and change the default paste behavior. The correct option to achieve this is defaultPasteMode=plaintext.

Steps to configure the RTE plugin for plain text pasting:

Locate the RTE Configuration: Find the existing configuration for the RTE or create a new one in the /apps directory of your AEM project.

Modify the Plugin Configuration: Add or update the configuration to include the defaultPasteMode parameter. The configuration might look something like this:

{

"jcr:primaryType": "nt:unstructured",

"features": "[text]",

"defaultPasteMode": "plaintext"

}

Apply the Configuration: Ensure that this configuration is applied to the Text component. This typically involves updating the component dialog or design dialog to reference the updated RTE configuration.

Test the Configuration: In the AEM author instance, open the page with the Text component and paste text using CTRL+V. The pasted text should now be stripped of all styling and formatting, adhering to the plaintext mode.

By setting defaultPasteMode to plaintext, you ensure that the RTE only accepts plain text input, removing any formatting that might come from external sources.

References:

AEM Rich Text Editor (RTE) Documentation

Configuring the Rich Text Editor in AEM

AEM SPA integration provides various design models for different levels of authoring capabilities and developer control. In the design model where AEM is used as a headless CMS without using the SPA Editor SDK framework, the developer has full control over the app and can use any SPA framework or library. However, this also means that the content author cannot edit the app using AEM’s content authoring experience, the SPA is not compatible with the template editor, and the developer cannot enable authoring in restricted areas of the app.References:https://experienceleague.adobe.com/docs/experience-manager-learn/spa-editor-overview/spa-overview.html?lang=en#design-models

Sling Content Distribution is a feature that allows synchronizing user data across publish servers in a publish farm. Sling Content Distribution uses agents to distribute content from one instance to another using a publish-publish topology. Sling Content Distribution can be configured to synchronize user data under /home/users and /home/groups paths, as well as their ACLs. References: https://experienceleague.adobe.com/docs/experience-manager-65/administering/security/sync.html?lang=en https://experienceleague.adobe.com/docs/experience-manager-learn/sites/deploying/sling-content-distribution.html?lang=en

To debug a CQ HTML client library in the AEM author instance, you need to add the query parameter debugClientLibs set to true. This parameter instructs AEM to include additional debugging information for client libraries, making it easier to troubleshoot issues with JavaScript, CSS, and other assets.

Steps to enable client library debugging:

Open the AEM Page: Navigate to the AEM page where you want to debug the client libraries.

Append the Query Parameter: Add ?debugClientLibs=true to the URL. For example:

http://localhost:4502/content/we-retail/us/en.html?debugClientLibs=true

Reload the Page: Refresh the browser page. AEM will now include debugging information for client libraries.

This parameter helps in identifying issues with client library loading, dependencies, and other client-side resources.

References:

Debugging Client Libraries in AEM

To enable JSON export on any component after defining a Sling Model, you need to annotate the Sling Model interface with @Exporter annotation. This annotation is part of the Sling Model Exporter framework which allows Sling Models to be exported in JSON format.

Here is the detailed step-by-step explanation:

Define the Sling Model: Define your Sling Model with the necessary annotations and methods. For example:

@Model(adaptables = Resource.class)

public class MyModel {

@Inject

private String title;

public String getTitle() {

return title;

}

}

Annotate with @Exporter: Annotate the Sling Model class with @Exporter to enable JSON export. The @Exporter annotation configures the model to be exported as JSON.

@Model(adaptables = Resource.class)

@Exporter(name = "jackson", extensions = "json")

public class MyModel {

@Inject

private String title;

public String getTitle() {

return title;

}

}

Access the JSON Output: Once annotated, the JSON representation of the model can be accessed through the .model.json extension. For example, if your component is at /content/mysite/en, you can access the JSON output at:

http://localhost:4502/content/mysite/en.model.json

This approach leverages the Sling Model Exporter framework to seamlessly convert Sling Models to JSON format, making it easy to integrate with front-end frameworks and other systems that consume JSON data.

References:

Adobe Sling Model Exporter

AEM Core Components JSON Export

The aemanalyser-maven-plugin is a Maven plugin that checks if all the requirements declarations made in OSGi bundles are satisfied by the capabilities declarations of other bundles included in the Maven project. This plugin ensures that the OSGi bundles are consistent and can be resolved at runtime. The plugin also checks for other issues such as API compatibility, package versioning, and bundle start order. References: https://experienceleague.adobe.com/docs/experience-manager-cloud-service/implementing/developing/aem-project-content-package-structure.html?lang=en#build-analyzer-maven-plugin https://github.com/adobe/aemanalyser-maven-plugin

Embedding client libraries is a technique that allows combining code from multiple client libraries into a single file. This reduces the number of network requests and improves performance. Embedding client libraries can be done by using the embed property of the cq:ClientLibraryFolder node and specifying the categories of the client libraries to be embedded. References: https://experienceleague.adobe.com/docs/experience-manager-cloud-service/content/implementing/developing/full-stack/clientlibs.html?lang=en#embed https://experienceleague.adobe.com/docs/experience-manager-65/developing/introduction/clientlibs.html?lang=en#embedded-files

When multiple configurations for the same PID are applicable, the configuration with the highest number of matching runmodes is applied. This is because the runmodes act as a filter to select the most specific configuration for a given environment. If there is a tie between two or more configurations with the same number of matching runmodes, the one that occurs first in the repository is applied.References:https://experienceleague.adobe.com/docs/experience-manager-65/deploying/configuring/configure-runmodes.html?lang=en#configuring-osgi-settings-per-runmode

The Deployment Manager is a role that can configure or run pipelines in Cloud Manager. The Deployment Manager can create and edit programs and environments, configure pipelines, start and cancel pipeline executions, and approve or reject deployments to production. The Deployment Manager role requires an IMS ID that is associated with the Adobe ExperienceCloud product profile. References: https://experienceleague.adobe.com/docs/experience-manager-cloud-service/implementing/using-cloud-manager/adding-users-to-programs-and-environments.html?lang=en#roles-and-responsibilities https://experienceleague.adobe.com/docs/experience-manager-cloud-service/implementing/using-cloud-manager/cloud-manager-user-roles.html?lang=en