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

Explanation (Adobe Docs Reference):

The correct OSGi Declarative Services (DS) implementation in AEM:

Must use implements (not extends).

Must register the service interface (SimpleService.class).

Should return an implementation for getMessage().

Option D is the correct implementation.

Options A, B, C are wrong because:

A incorrectly uses extends.

B and C register the wrong service type (MySimpleService).

Adobe Documentation:

“An OSGi service implementation must implement its interface and be annotated with @Component(service=Interface.class) to register the service.”

— OSGi Services in AEM

Text pre-extraction is recommended during reindexing of existing Lucene indexes that have binary extraction enabled. Binary extraction is the process where text content is extracted from binary files (such as PDFs or Word documents) for indexing. During reindexing, extracting text repeatedly from large binaries can cause performance degradation. Pre-extraction allows text to be extracted once and reused during indexing, significantly reducing reindexing time and system load. Option B is incorrect because small repositories don’t require pre-extraction optimization. Option C is also incorrect, as images generally don’t involve binary text extraction unless paired with OCR. Adobe highlights pre-extraction as a performance optimization technique for reindexing scenarios involving binary text content.

The Retry Delay setting in a replication agent specifies the interval (in milliseconds) to wait before retrying a failed replication request. This ensures that temporary network or system issues don’t permanently block replication, as the agent will automatically attempt to resend content at the configured delay interval.

From Adobe Documentation:

“Retry Delay: The time (in milliseconds) to wait before attempting to retry a failed replication. This helps ensure that replication requests are retried at regular intervals if initial delivery fails.”

— Adobe AEM 6.5 & AEMaaCS – Replication Agent Configuration

Workflow launchers in AEM are designed to monitor changes in specific repository paths such as /content, /content/dam, and /conf. However, changes under certain system-level paths, including /var, do not trigger workflows. This restriction is intentional, as /var is used for system-generated and internal data such as workflow instances, audit logs, and temporary nodes. Triggering workflows on changes under /var could result in recursive or unintended behavior. Option A is unrelated because Workflow Process Legacy Mode refers to backwards compatibility. Option B is incorrect, as AEM does allow system nodes under /var, but they are not workflow-launcher enabled. Adobe documentation makes clear that workflow launchers must be configured under supported content paths for them to execute correctly.

The correct approach to display external API results using server-side rendering in AEM is to separate responsibilities across three layers. First, create an OSGi component that encapsulates the logic for making external API calls using an HTTP client. This ensures reusability and central management of integration code. Second, create a Sling Model that references this OSGi service. Sling Models provide a resource-adaptable layer that connects AEM components to backend services, making it easier to expose data to HTL scripts. Finally, bind this Sling Model to an AEM component, which displays the fetched data in server-rendered HTML. This is aligned with Adobe’s guidance that integration logic should be handled within OSGi services, with Sling Models bridging content and services for components. Options B and C incorrectly assign responsibilities to Servlets or components, which violates best practices for modularity.