Adobe AD0-E124 Practice Online | AD0-E124 Clearer Explanation

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Adobe AD0-E124 Exam Syllabus Topics:

Section	Weight	Objectives
Build and Deployment	25%	- CI/CD Pipeline Implementation 1. Manage code repositories and branching strategies 2. Implement CI/CD pipelines for AEM applications 3. Configure build and deployment processes - Content Package Management 1. Manage package deployment and versioning 2. Implement content synchronization strategies 3. Create and manage content packages
Environment Setup and Infrastructure	25%	- AEM as a Cloud Service Architecture 1. Identify the differences between AEM as a Cloud Service and on-premise AEM 2. Describe the role of Adobe Managed Services vs Cloud Service 3. Understand AEM as a Cloud Service architecture and components - Environment Provisioning and Configuration 1. Understand program and environment types 2. Manage environment variables and configurations 3. Provision and configure AEM Cloud environments (Dev, Stage, Production)
Monitoring and Performance	20%	- Performance Optimization 1. Optimize AEM configurations for performance 2. Identify and resolve performance bottlenecks 3. Implement caching strategies - Monitoring and Logging 1. Configure and analyze logs and metrics 2. Set up alerting and notification systems 3. Implement monitoring solutions for AEM
Troubleshooting and Maintenance	15%	- Issue Diagnosis and Resolution 1. Use debugging tools and techniques 2. Diagnose common AEM issues 3. Implement troubleshooting methodologies - Maintenance and Updates 1. Implement maintenance procedures 2. Plan and execute system upgrades 3. Manage AEM updates and patches
Security and Compliance	15%	- Compliance and Governance 1. Ensure compliance with regulatory requirements 2. Manage audit trails and logging 3. Implement backup and disaster recovery strategies - Security Configuration 1. Implement security best practices for AEM 2. Configure user access and permissions 3. Manage SSL certificates and encryption

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Adobe Experience Manager DevOps Engineer Expert Sample Questions (Q128-Q133):

NEW QUESTION # 128
Which OSGi settings must be properly configured to optimize performance? (Choose three)

A. Apache Sling Resource Resolver Factory
B. Apache Jackrabbit Query Engine Configuration
C. Replication Agents for Dispatcher Flush
D. Oak Repository Cache Configuration

Answer: A,B,D

NEW QUESTION # 129
A DevOps developer needs to test virtual host configuration on Dispatcher. Which command should the DevOps engineer use?

A. curl -H "Host: mysite.com" origin-mysite.adobeqms.com
B. curl -H "Dispatch: mysite.com" origin-mysite.adobeqms.com
C. curl -H "Host: origin-mysite.adobeqms.com" mysite.com
D. curl --verbose --header origin-mysite.adobeqms.com

Answer: A

Explanation:
When troubleshooting routing or Virtual Host configurations on a Dispatcher (which is typically an Apache or Nginx web proxy), the proxy relies on the Host HTTP header to determine which farm or server block should process the request. Using cURL, you can bypass DNS layers and test the origin server directly by specifying the target IP or default hostname (e.g., origin-mysite.adobeqms.com) while explicitly passing the desired Virtual Host name via the Host header (-H "Host: mysite.com"). This forces the Dispatcher to process the request as if it were traffic coming for mysite.com.

NEW QUESTION # 130
One week ago, a P3 ticket was closed. The ticket contains all pertinent information about the issue and the corresponding resolution. Today, the exact issue is happening. The resolution is not working.
What should the DevOps engineer do?

A. Log a new ticket with a higher priority
B. Escalate via the Actions section
C. Reopen the same ticket
D. Open a new ticket

Answer: C

NEW QUESTION # 131
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. There are too many concurrent users.
B. JCR sessions are not closed properly.
C. The data store used is not appropriate.
D. The access rights strategy has too many groups and too many ACLs.

Answer: B

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 # 132
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 # 133
......

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