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IBM Certifed Systems Expert A4040-121

A4040-121

Exam Code: A4040-121

Exam Name: Assessment: Virtualization Technical Support for IBM i -v1

Updated: Oct 09, 2026

Q&A Number: 102 Q&As

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IBM A4040-121 Exam Syllabus Topics:

SectionObjectives
Topic 1: IBM i Virtualization Fundamentals- PowerVM components and configuration
  • 1. Virtual adapters and device mapping
    • 2. VIOS (Virtual I/O Server) basics
      - IBM i architecture and virtualization concepts
      • 1. IBM i logical partitioning (LPAR) overview
        • 2. Power Systems virtualization concepts
          Topic 2: System Administration and Configuration- Storage virtualization
          • 1. SAN and virtual disk configuration
            • 2. Disk pooling and management
              - Partition management
              • 1. Creating and managing LPARs
                • 2. Resource allocation (CPU, memory, storage)
                  Topic 3: Networking and I/O Virtualization- I/O resource virtualization
                  • 1. Shared Ethernet Adapter (SEA)
                    • 2. NPIV configuration basics
                      - Virtual networking on IBM Power systems
                      • 1. Network configuration in VIOS
                        • 2. Virtual Ethernet adapters
                          Topic 4: Troubleshooting and Support- Performance and resource issues
                          • 1. Monitoring tools and diagnostics
                            • 2. Identifying virtualization bottlenecks
                              - System recovery and maintenance
                              • 1. LPAR restore and failover concepts
                                • 2. VIOS recovery procedures

                                  IBM Assessment: Virtualization Technical Support for IBM i -v1 Sample Questions:

                                  Question #1
                                  A client IBM i partition is being planned. Dual VIO Servers will each provide 40 SAN disks to the client partition, mirrored in IBM i at the adapter level (see example below).

                                  Considering both the host and client partitions, what is the minimum number of vSCSI adapters required to support this disk configuration?

                                  A. 4
                                  B. 12
                                  C. 8
                                  D. 6
                                  E. 16


                                  Question #2
                                  A customer has a single-partition Power 720 running IBM i. They would like to install some additional adapters and implement 5 additional partitions. In addition to installing the adapters and configuring an HMC, what else is necessary?

                                  A. Configure the new partitions.
                                  Activate the new profiles to remove "required" features of the existing partition.
                                  B. Modify the existing partition profile to not "use all resources in system" and own only what it
                                  needs. Reactivate the profile.
                                  Create partitions and profiles for the additional partitions.
                                  C. Modify the profile of the existing partition and concurrently enable it.
                                  Resume the existing partition.
                                  Create partitions and profiles for the additional LPARs.
                                  D. Create a new partition and profile for the original LPAR with only the resources the partition
                                  needs. Create partitions and profiles forth additional partitions.
                                  Delete the original partition.
                                  Suspend the existing partition.


                                  Question #3
                                  In order to suspend an IBM i partition1 which hardware resources need to be virtualized?

                                  A. All SCSI resources
                                  B. All resources
                                  C. All disk resources
                                  D. All networking resources


                                  Question #4
                                  An administrator is building a client IBM i partition to be used as a development environment. The client partition requires 210GB of disk space, which will be provided by the hosting IBM i LPAR.
                                  On the hosting IBM i LPARI which disk configuration will provide the best performance to the client LPAR?

                                  A. Two virtual 52.5GB disks *SYSBASI and two 52.5GB disks in an iASP.
                                  B. One virtual 210GB disk in a separate ASP.
                                  C. One virtual 210GB disk across all physical disks in *SYSBAS.
                                  D. Six virtual 35GB disks across all physical disks in *SYSBAS.


                                  Question #5
                                  Additional SAN disk volumes have been dynamically presented to a VIO Server (VIOS) partition, and these resources need to be mapped to an IBM i partition. In order for these resources to be visible in the VIOS partition, what is the appropriate next step?

                                  A. As padmin, run cfgmgr in the VIOS partition.
                                  B. Use the Disk Management function in System Management Services (SMS).
                                  C. Run the cfgdev command in the VIOS partition.
                                  D. Add an SCSI device in the HMC for the client partition.


                                  Solutions:

                                  Question #1
                                  Correct Answer: B
                                  Question #2
                                  Correct Answer: D
                                  Question #3
                                  Correct Answer: B
                                  Question #4
                                  Correct Answer: D
                                  Question #5
                                  Correct Answer: C

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