EX260 Sample Questions

EX260 Sample Questions & Answers

Free Specialist In Ceph Cloud Storage practice questions with worked answers and explanations. See how the ExamJungle simulator prepares you — then jump into the full test.

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Showing 6 of 12 free samples.

  1. Question 1Advanced

    Configure Red Hat Ceph Storage server · Create and configure erasure-coded pools

    You are configuring a new Ceph Block Device (RBD) pool for a virtualization workload. The workload requires high durability but must be cost-effective regarding storage capacity. You decide to use Erasure Coding. Which of the following profiles would withstand the failure of two OSDs simultaneously while minimizing the storage overhead compared to 3-way replication?

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    Correct answer: C

    In an Erasure Coding profile, 'm' represents the number of coding chunks (parity), which equals the number of simultaneous failures the system can tolerate. 'k' is data chunks. k=4, m=2 allows 2 failures. The overhead is (k+m)/k = 6/4 = 1.5x. This is significantly less than 3-way replication (3.0x overhead).

  2. Question 2IntermediateSelect 2

    Provide block storage with RBD · Create an RBD clone

    A developer needs to create a snapshot of a Ceph Block Device (RBD) image named database-vol in the production pool. After creating the snapshot, they intend to create a new clone from it for testing purposes. Which prerequisites must be met before the clone can be created? (Select TWO)

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    Correct answers: B, D

    Before cloning, the snapshot must be protected to prevent it from being deleted while child clones exist. This ensures data integrity for the clones that rely on the parent snapshot.

    Cloning relies on the RBD layering feature (Copy-On-Write). This feature must be enabled on the image to support cloning operations.

  3. Question 3Beginner

    Provide block storage with RBD · Configure one-way RBD mirroring in image mode

    True or False: When configuring RBD mirroring in 'image mode', you must manually enable mirroring for each individual image you wish to replicate, whereas 'pool mode' automatically replicates all images in the pool.

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    Correct answer: A

    This is accurate. In 'pool mode', the mirroring configuration applies to the entire pool, and every image created within it is mirrored by default. In 'image mode', the pool is configured for mirroring, but the administrator must explicitly enable mirroring on specific images.

  4. Question 4Intermediate

    Provide file storage with CephFS · Configure CephFS quotas

    An administrator needs to configure a CephFS file system to limit a specific project directory /project_alpha to 1 TB of space. This limitation should apply strictly to the directory hierarchy regardless of the user writing the data. Which command accomplishes this?

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    Correct answer: D

    CephFS quotas are implemented using extended attributes (xattrs) on the directory. The attribute ceph.quota.max_bytes sets the limit on the total size of data in the directory hierarchy.

  5. Question 5Intermediate

    Configure Red Hat Ceph Storage server · Configure placement group auto-scaling

    A storage architect is designing a Ceph cluster where the placement groups (PGs) need to be automatically adjusted based on usage patterns to maintain optimal performance. Which mode should be enabled on the pg_autoscaler module to allow the system to recommend changes but require administrator approval before applying them?

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    Correct answer: C

    The warn mode calculates the optimal PG count and issues health warnings if the current count deviates significantly, but it does not automatically adjust the PGs. This allows the administrator to review recommendations before applying changes. 'on' would apply them automatically.

  6. Question 6Intermediate

    Integrate Red Hat Ceph Storage with Red Hat OpenStack Platform · Modify key Cinder configuration files

    You are integrating Red Hat Ceph Storage with Red Hat OpenStack Platform. You need to configure the Cinder service to use the Ceph cluster for block storage. Which configuration file on the OpenStack Controller nodes typically requires modification to define the RBD backend?

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    Correct answer: A

    The cinder.conf file is the primary configuration file for the Block Storage service. You must define a backend section (e.g., [ceph]) utilizing the volume_driver = cinder.volume.drivers.rbd.RBDDriver and specify the pool and user details here.

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