AD0-E137 Exam Dumps - Adobe Experience Manager Questions and Answers

Explanation (Adobe Docs Reference):

In Adobe Experience Manager (AEM), the SPA Editor enables the development of Single Page Applications (SPAs) that integrate with AEM’s content management capabilities. SPA components in AEM are typically React or Angular components mapped to AEM components, and their data is exposed to the SPA via JSON through the Sling Model Exporter framework. The ComponentExporter interface, part of the com.adobe.cq.export.json package, is used to define how AEM components are serialized into JSON for consumption by the SPA. By default, AEM provides a standard exporter (via the Sling Model Exporter) that serializes component data based on the Sling Model’s annotations and properties. However, developers can override this default exporter for specific components to customize the JSON output, such as adding, removing, or modifying fields.

The question specifies that the developer is creating a set of SPA components, where half do not require a custom component exporter (i.e., they can use the default exporter), and the other half need a custom exporter to override the default behavior. Let’s analyze the options to determine the correct approach:

Analysis of Options:

Option A: Implement ImplementationPicker service

The ImplementationPicker interface (from com.adobe.cq.wcm.core.components.util) is used in AEM’s Core Components to dynamically select the implementation of a component based on specific conditions, such as resource type or request context. It is not related to the Sling Model Exporter or JSON serialization for SPA components. Implementing an ImplementationPicker service would be relevant for selecting different component implementations (e.g., different HTL scripts or Java classes) but does not address the need to customize JSON export for SPA components. This option is incorrect.

Option B: Implement ComponentExporter service

The ComponentExporter interface is designed for SPA integration in AEM. When a Sling Model implements ComponentExporter, it can be serialized into JSON by the Sling Model Exporter, which is used by the SPA Editor to provide component data to the front-end SPA (React or Angular). To override the default exporter, a developer creates a Sling Model for each SPA component that requires customization, annotates it with @Model (specifying resourceType and exporters), and implements ComponentExporter. The model can then define custom methods or annotations (e.g., @JsonProperty, @ValueMapValue) to control the JSON output. For the components that do not require a custom exporter, the default Sling Model Exporter behavior (provided by AEM or Core Components) can be used without implementing ComponentExporter. This approach perfectly aligns with the requirement to override the default exporter for only half of the components. This option is correct.

Option C: Implement FallbackComponentImpl service

There is no such thing as a FallbackComponentImpl service in AEM or its SPA Editor framework. This appears to be a fictitious or misleading option. AEM’s SPA Editor and Sling Model Exporter do not use a “fallback” service for JSON export customization. Instead, customization is achieved through the ComponentExporter interface or by extending existing exporters. This option is incorrect.

Correct Implementation:

To meet the goal, the developer should:

For components that do not require a custom exporter, rely on the default Sling Model Exporter behavior. These components can use standard Sling Models (or Core Components) that are automatically serialized into JSON based on their properties and annotations.

For components requiring a custom exporter, create Sling Models that implement the ComponentExporter interface and annotate them with @Model (from org.apache.sling.models.annotations) and @Exporter (from org.apache.sling.models.annotations). For example:

import com.adobe.cq.export.json.ComponentExporter;

import org.apache.sling.api.SlingHttpServletRequest;

import org.apache.sling.models.annotations.Model;

import org.apache.sling.models.annotations.Exporter;

import org.apache.sling.models.annotations.injectorspecific.ValueMapValue;

import com.fasterxml.jackson.annotation.JsonProperty;

@Model(adaptables = SlingHttpServletRequest.class,

adapters = {ComponentExporter.class},

resourceType = "wknd/components/customcomponent",

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

public class CustomComponentModel implements ComponentExporter {

@ValueMapValue

private String customField;

@JsonProperty("renamedField")

The @Model annotation specifies that the class is a Sling Model adaptable from a SlingHttpServletRequest and implements ComponentExporter.

The @Exporter annotation registers the model with the Sling Model Exporter for JSON output (using Jackson).

The getExportedType() method, required by ComponentExporter, returns the resource type, which is used by the SPA to identify the component.

Custom logic (e.g., toUpperCase()) or annotations like @JsonProperty can be used to modify the JSON output.

Ensure the SPA Editor is configured correctly in AEM (e.g., the SPA project is set up with proper page templates and policies) to map these components to their front-end counterparts.

Why Option B is Correct:

Implementing ComponentExporter allows the developer to define custom Sling Models for the components that need a customized JSON output, overriding the default exporter’s behavior.

For the other half of the components, the default exporter (provided by AEM or Core Components) can be used without additional implementation.

This approach leverages AEM’s SPA Editor and Sling Model Exporter framework, which is specifically designed for exposing AEM component data to SPAs via JSON.

Exact Extracts from Adobe Experience Manager (AEM) Sites Developer Documents:

From "SPA Editor - Developing SPAs for AEM": "AEM components, which are used within the SPA Editor, must implement the ComponentExporter interface to be serialized correctly into the JSON format expected by the SPA. This interface allows developers to customize the JSON export of components for SPA integration."

From "Sling Model Exporter": "The Sling Model Exporter framework allows Sling Models to be exported as JSON for SPA integration. By implementing ComponentExporter and annotating with @Exporter(name = 'jackson', extensions = 'json'), developers can control the JSON output of their components."

From "AEM SPA Editor and React/Angular": "For custom components requiring specific JSON structures, implement a Sling Model with ComponentExporter and define custom getters to shape the JSON output. Components without custom exporters can rely on the default JSON serialization provided by AEM."

In AEM’s Template Editor, there are multiple modes that allow template authors to configure different aspects of templates. The Structure mode defines static and editable areas in templates. The Page Policy allows defining rules such as which components are available for use. However, the Layout mode is specifically designed for defining grid settings for different devices. With Layout mode, template authors can configure responsive layouts and grid behavior across breakpoints such as desktop, tablet, and mobile. This ensures consistent responsive design and adaptability across devices. Adobe documentation specifies that “Layout mode allows authors to configure responsive grid layouts for different breakpoints, ensuring that pages render appropriately on devices of varying screen sizes.” This mode is essential for enabling adaptive and responsive designs in AEM projects. Options B and C do not allow for device-specific grid settings and thus are not correct.

In AEM as a Cloud Service, dedicated preview service endpoints are configured under publish run modes. The correct configuration folder for a UAT preview service is config.publish.uat within the ui.config project. Option A incorrectly places the configuration under author run mode, which is unrelated to preview endpoints. Option C misorders the naming convention, using config.uat.author instead of the proper config.publish.uat. Adobe’s guidance specifies that preview service configuration is a publish-tier responsibility, requiring config.publish. folders in the configuration project.

When defining component style options in AEM, authors can select from pre-defined CSS classes by configuring them in the component’s cq:editConfig node under /cq:style. The correct properties are:

cq:styleClasses: Defines the list of CSS classes that authors can apply.

cq:styleLabel: Defines the label displayed in the authoring dialog for the style selection.

Options B, C, D are incorrect because they use invalid property names (cssClasses, styleLabel, cssStyles, cssLabel) which are not recognized by AEM.

From Adobe Documentation:

“Component styles can be defined using the cq:editConfig node. Authors can choose between style variations configured under cq:styleClasses with a descriptive cq:styleLabel.”

— AEM 6.5 – Defining Component Styles with cq:editConfig

— AEM Core Components – Style System

Explanation (Adobe Docs Reference):

Unit tests for Sling Models using wcm.io AEM Mocks (AemContext) require test content to be loaded into the mock JCR repository. This is usually done with:

ctx.load().json("/path/to/test-content.json", "/content");

Without loading node data, ctx.currentResource("/content/bar") won’t resolve anything, causing adaptTo(Flarp.class) to return null.

A is wrong: AemContext is correct for Sling Models in AEM.

B is wrong: @Rule applies to JUnit4, but the test uses JUnit5 with @ExtendWith.

C is correct: Loading JSON test content is required.

Adobe/WCM.IO Documentation:

“Use context.load().json() to load test content into the JCR repository for unit tests. Then set context.currentResource(path) to adapt resources to Sling Models.”

— wcm.io AEM Mocks Documentation

Explanation (Adobe Docs Reference):

AEM provides Generic Analytics Snippet functionality to allow marketing/analytics teams to manage third-party tracking scripts directly through the AEM UI, without needing a development release cycle. This enables non-developers to add or update scripts (e.g., analytics tags, marketing pixels) safely.

Option A is incorrect: Hardcoding the script in HTL means dev releases are required for every change.

Option B is incorrect: Page policies control design configurations and allowed components, not scripts.

Option C is correct: Generic Analytics Snippet is designed for this scenario.

Adobe Documentation:

“AEM provides a generic analytics snippet component that allows administrators to add and manage third-party tracking codes outside of the development cycle.”

— AEM Sites – Generic Analytics Snippet

Explanation (Adobe Docs Reference):

Assets in AEM are stored as dam:Asset nodes, not nt:base or cq:image.

Metadata like cq:lastModified is stored under jcr:content/metadata.

Therefore, the correct query must use [dam:Asset] with the proper metadata path.

Options A and C are invalid because they use wrong node types or incorrect property paths.

Adobe Documentation:

“Assets are represented as dam:Asset nodes. Metadata such as lastModified is stored under jcr:content/metadata and can be queried using JCR-SQL2.”

— AEM Assets – Querying Assets

The most common performance pitfall in AEM development is failing to configure proper indexing strategies for queries. Without indexes, repository queries fall back to traversal queries, which can be extremely expensive and cause performance degradation as datasets grow. While recursion, static variables, or synchronized blocks may cause other issues, they are not specific to AEM’s architecture. Adobe explicitly advises that developers always analyze queries using the Query Debugger and ensure properties being queried are indexed. Proper indexing is critical for scalability in AEM environments with large volumes of content and digital assets.

Explanation (Adobe Docs Reference):

In AEM SPA Editor, the MapTo function is used in the React (or Angular) component to map a frontend component to its corresponding AEM component resource type (Sling Model). This ensures data from the Sling Model is properly bound to the SPA component.

Correct: React component implements MapTo with the AEM component resource type.

Incorrect: The AEM Component or Sling Model itself does not implement MapTo.

Adobe Documentation:

“SPA components must call MapTo in the JavaScript app to map a frontend component to an AEM component resource type. This enables the Sling Model data to be injected into the SPA component.”

— AEM SPA Editor – MapTo Function

The correct HTL syntax combines the page path and the suffix in a structured format where the final .html extension appears at the end of the generated URL. In AEM, links must resolve to valid Sling resources that end in .html for pages, and suffixes can be appended before the extension. Option B correctly creates the path /content/testsite/en/page1/product/test1.html, which is a valid and Sling-resolvable path. Option A incorrectly places .html too early, producing an invalid URL that AEM cannot resolve. Option C inverts the intended relationship between the path and suffix. Adobe documentation for HTL and URL construction highlights that Sling requires .html as the standard extension for page rendering, and suffixes should precede this extension.