Pass the Adobe Experience Manager AD0-E123 Questions and answers with ExamsMirror

Sling Models is an AEM feature that allows developers to map JCR data to Java objects. It is a part of the Sling framework, which AEM is built on top of. Sling Models facilitate the decoupling of content from the rendering layer, making it easier to work with data in AEM components. By defining simple POJOs (Plain Old Java Objects) with annotations, developers can map properties from the JCR (Java Content Repository) to fields in a Java class, enabling a straightforward and type-safe way to handle the content. This is especially useful when creating components such as 'Hello World', where dynamic data needs to be fetched from the JCR and rendered on the page.

HTL and Dialogs (Option A) are used for rendering components and creating editable fields in the component dialogs, respectively, but do not facilitate data mapping to Java variables.

Client-Side Libraries (Option B) are used to manage client-side resources like JavaScript and CSS but are not involved in JCR to Java variable mapping.

In an AEM as a Cloud Service environment, the preferred approach to clear dispatcher cache of required resources is to use the Replication API along with a replication flush agent. This method allows for programmatic clearing of the cache and is the standard way of invalidating cached content so that the dispatcher can retrieve fresh content from the publish instance.

Option A, "Enable the explicit cache invalidation feature in cloud manager," is not a standard feature available in Cloud Manager.

Option C, "Create a servlet, which will make an HTTP request to the dispatcher," is not advisable as it bypasses the recommended AEM replication and flushing mechanisms and could lead to inconsistencies.

When customizing a core component in AEM, setting thesling:resourceSuperTypeproperty in the new component's definition allows it to inherit features from an existing core component. This property points to the resource type of the core component that is being extended or customized. By doing so, the new component inherits the core component's logic and rendering scripts but can be customized further according to project-specific requirements.

Option A,sling:resourceType, is used to define the primary resource type for a component and does not indicate inheritance.

Option B,jcr:title, is used to give a human-readable title to a node in the JCR and is unrelated to component inheritance.

AEM as a Cloud Service includes the latest AEM features out-of-the-box, including AEM Core Components, which are production-ready without the need for additional downloads or installations of sample content. This version of AEM has a continuousdelivery model, ensuring that the most up-to-date features and components are readily available.

Option A, Version 6.3, is incorrect because this version would require the manual download and installation of core components.

Option B, Adobe Managed Services, is not a version of AEM, but rather a hosting option that could include various versions of AEM.

Given the dispatcher configuration snippet provided in the image, we can understand the URL patterns that will be ignored (not cached) by the dispatcher. The configuration under/ignoreUrlParamsshows patterns to match query parameters in the URLs:

/0001 { /glob "*" /type "deny" } means that by default, all query parameters are ignored (not cached).

/0002 { /glob "search" /type "allow" } specifically allows caching for URLs with the 'search' parameter.

/0003 { /glob "order" /type "allow" } specifically allows caching for URLs with the 'order' parameter.

Based on this, let's evaluate the options:

A. /myproduct/myrecipe.html?search=searchparam — This URL will not be cached because the 'search' parameter is allowed, but the actual value 'searchparam' does not match any allow pattern. B. /myproduct/myrecipe.html?search=s&order=asc&brand=ad — This URL will not be cached because although 'search' and 'order' parameters are allowed, the 'brand' parameter is not allowed according to the configuration. C./myproduct/myrecipe.html?brand=mybrand — This URL will be cached because there are no allowed parameters, so the default deny does not apply, and the page can be cached without considering the 'brand' parameter.

Therefore, the page that will be cached on the dispatcher is the one in option C, as it does not contain any of the explicitly allowed query parameters ('search' or 'order'), and all other parameters are ignored by default.

In AEM, Lucene is often used for indexing due to its powerful full-text search capabilities, and it also supports asynchronous indexing. Asynchronous indexing allows the system to handle other tasks while indexing is being processed in the background, which can improve performance and scalability. This is especially useful when multiple properties need to be indexed without impacting the immediate response times of the system. Therefore, when a developer needs to enable the indexing of multiple properties asynchronously, a Lucene index is the most suitable choice.

In AEM, when you need to extend a dialog from a core component but want to hide or exclude one tab or part of the dialog, you can use thesling:hideResourceproperty. This property allows you to selectively hide resources (like a tab in a dialog) inherited from a super type (the core component) in your overlay or custom component.