Adobe - AD0-E124 - Useful Test Adobe Experience Manager DevOps Engineer Expert King

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Adobe AD0-E124 Exam Syllabus Topics:

Section	Objectives
Topic 1: AEM Architecture & Cloud Services	- AEM infrastructure components 1. CDN and caching layers 2. Publish, Author, Dispatcher roles - AEM as a Cloud Service architecture principles 1. Cloud-native architecture concepts 2. Service layers and deployment topology
Topic 2: Environment Management & Operations	- Environment setup and configuration 1. Configuration management strategies 2. Dev, Stage, and Production environments - Monitoring and troubleshooting 1. Performance tuning and diagnostics 2. Logging and observability
Topic 3: Build & Deployment Automation	- Maven-based build systems 1. Project structure and dependencies 2. Package assembly and deployment - Adobe Cloud Manager 1. Environment promotion strategies 2. Pipeline configuration and execution
Topic 4: DevOps Practices for AEM	- Version control and branching strategies 1. Git workflows for AEM projects 2. Release management strategies - CI/CD pipeline management 1. Code quality and validation processes 2. Build and deployment pipelines
Topic 5: Security & Performance	- Performance optimization 1. Dispatcher configuration tuning 2. Caching strategies - Security best practices 1. Secure deployment practices 2. Access control and permissions

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Adobe Experience Manager DevOps Engineer Expert Sample Questions (Q61-Q66):

NEW QUESTION # 61
A DevOps engineer wants to migrate a project code base into Cloud Manager. Which two actions must the DevOps engineer take to make sure the migration is successful? (Choose two.)

A. Run the Dispatcher validator to make sure there are no errors in the Dispatcher configuration.
B. Run the source code through a local static code quality checker and analyze the report to identify any potential issues.
C. Review the source code and make sure it meets the required standards and that all the classes have unit tests.
D. Build and deploy the source code repository to a local environment using the latest version of the SDK.

Answer: A,D

Explanation:
When migrating an existing AEM code base to AEM as a Cloud Service (AEMaaCS), the structure and rules are strictly enforced by the Cloud Manager pipeline. Before pushing code, a DevOps engineer must validate the code locally against the AEM as a Cloud Service SDK to ensure OSGi bundles resolve and mutable
/immutable content separations are respected (Option B). Additionally, the Dispatcher configuration has migrated from an Apache-based structure to a strict AEMaaCS format. Running the local Dispatcher Validator CLI tool (Option C) is mandatory to ensure there are no syntax or structural errors in the dispatcher configurations, which would otherwise immediately fail the Cloud Manager build pipeline.

NEW QUESTION # 62
How should a DevOps engineer perform an AEM upgrade that preserves version history and workflows?

A. Delete the existing crx-quickstart folder and run the new jar file.
B. Unpack the upgraded Quickstart jar in the existing AEM directory and start the instance.
C. Upload the upgraded AEM Quickstart jar to Package Manager and click the Install button.
D. Install a new AEM server with the upgraded Quickstart jar and copy the site content using packages.

Answer: B

Explanation:
To perform an in-place upgrade of an AEM instance (such as upgrading from AEM 6.4 to 6.5) while preserving version history, workflow instances, and audit logs, the correct approach is an "in-place upgrade." This involves placing the new AEM quickstart JAR file in the existing installation directory, unpacking it using the -unpack command, and then starting the instance. Copying site content using Content Packages (Option C) will move the latest state of the nodes but will lose version history, ACLs (if not included), and running workflow instances.

NEW QUESTION # 63
Which best practice should be followed when modifying pom.xml to support Cloud Manager pipelines?

A. Disable unit tests to speed up the build process
B. Use hardcoded repository URLs for all dependencies
C. Configure profiles for different environments using run modes
D. Minimize dependencies to improve build speed

Answer: C

NEW QUESTION # 64
What is the correct way to enable verbose logging for a specific OSGi service in AEM?

A. Adjust logging configurations in the Dispatcher rules
B. Change the logging level in the /system/console/slinglog interface
C. Modify the log4j.xml file directly in the AEM installation
D. Enable logging in the CRXDE Lite interface

Answer: B

NEW QUESTION # 65
A DevOps engineer notices that a system occasionally gets slower.
* No deployment has been recently performed.
* After a restart of the instance, the performance degradation is mitigated.
* If no action is taken, the JVM tends to crash in an unpredictable manner with Out Of Memory exceptions.
* There is no clear correlation between visitor peaks and crashes of the instances.
* The same symptoms affect author and publish instances.
What is causing this issue?

A. JCR sessions are not closed properly.
B. The access rights strategy has too many groups and too many ACLs.
C. The data store used is not appropriate.
D. There are too many concurrent users.

Answer: A

Explanation:
Unclosed JCR sessions are a classic cause of memory leaks in AEM applications. When custom backend code opens a JCR Session or ResourceResolver but fails to close it within a finally block, the garbage collector cannot reclaim that memory. Over time, these open sessions accumulate in the heap memory, causing the system to slow down and eventually leading to unpredictable OutOfMemory (OOM) crashes. Restarting the instance clears the heap, temporarily mitigating the issue until the unclosed sessions build up again. This issue is agnostic of visitor peaks or runmodes (author/publish).

NEW QUESTION # 66
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