AD0-E137 Exam Dumps - Adobe Experience Manager Sites Developer Expert

In AEM, multi-site management allows centralized content updates to be pushed across different localized or departmental sites. The “Partial” option on the rollout configuration ensures that only specific components or regions designated for shared updates are synchronized, while leaving local content intact. This fits the described requirement where a portion of each school’s homepage must receive university updates without affecting school-specific content. Option A, Experience Fragments, could be used but are better suited for shared fragments of design/content, not controlled rollout scenarios. Option C requires manual inheritance restoration per page, which is inefficient. Option D, implementing custom rollout logic, is not needed when the built-in “Partial Rollout” option fulfills the requirement. Adobe emphasizes using partial rollout in multi-site configurations to balance central control with localized autonomy.

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

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):

The recommended way to bind servlets in AEM (OSGi DS) is via the @SlingServletResourceTypes annotation.

The methods value must be uppercase "GET".

doGet() method must use SlingHttpServletRequest and SlingHttpServletResponse instead of standard Servlet API request/response.

SlingAllMethodsServlet is safe for handling multiple HTTP verbs, but you can extend SlingSafeMethodsServlet too. However, in Adobe docs examples, the uppercase "GET" with doGet(SlingHttpServletRequest, SlingHttpServletResponse) is correct.

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