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Horizon Engineer - Extended Free Sample Questions

12 free sample questions135 in the full practice test Other version: OCE-H(211)

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OCE-H-EXT Sample Questions

  1. Question 1

    Case Study Scenario: Environment: A large hospital uses non-persistent Instant Clones for their nursing staff.

    Issue: During the 7:00 AM shift change, hundreds of nurses log in simultaneously. The vSphere infrastructure experiences severe CPU and storage I/O contention, causing desktops to become unresponsive and provisioning to slow to a crawl. The pool is configured to provision machines on demand, and the maximum concurrent provisioning operations setting in Horizon is set to the default.

    Objective: Mitigate the boot and logon storm without permanently pre-powering all 2,000 desktops 24/7.

    Which combination of Horizon settings optimally resolves this issue while balancing resource utilization?

    Answer and explanation

    Correct answer: A

    To handle boot/logon storms effectively without wasting resources 24/7, administrators should increase the 'Spare (powered on) machines' buffer just before the known shift change via scheduled pool settings. Additionally, enabling View Storage Accelerator (Content-Based Read Cache) significantly reduces the storage I/O read spikes during mass boot operations by caching common blocks of the golden image in the ESXi host memory.

    flowchart TD A[7:00 AM Shift Change] --> B{Buffer Ready?} B -->|No| C[Mass Provisioning Triggered] C --> D[High CPU & IOPS Contention] D --> E[Logon Delays] B -->|Yes| F[Users Connect to Spare VMs] F --> G[CBRC Caches OS Reads] G --> H[Smooth Logon Experience]

  2. Question 2

    A team of engineers using 3D modeling software reports receiving a 'No available resources' error when attempting to connect to an NVIDIA vGPU-enabled Instant Clone pool. Upon checking vCenter, the ESXi hosts have plenty of available CPU, memory, and physical GPU capacity.

    Which of the following is the most likely cause of this issue?

    Answer and explanation

    Correct answer: B

    For vGPU-enabled Instant Clones to power on, the exact vGPU profile (e.g., grid_rtx8000-2q) assigned to the Golden/Parent VM must be available on the physical ESXi hosts. If the hosts are configured for a different profile type, the VMs will fail to power on due to lack of matching resources, resulting in the 'No available resources' error for end users.

  3. Question 3

    True or False: When troubleshooting an Instant Clone virtual machine, placing the machine into 'Maintenance Mode' via the Horizon Console prevents the Horizon Connection Server from deleting the VM during a standard pool scale-in or refresh operation, allowing administrators time to pull debug logs.

    Answer and explanation

    Correct answer: A

    True. Placing an Instant Clone into Maintenance Mode in the Horizon Console effectively quarantines the VM. It stops new user connections and prevents the Horizon automated provisioning engine from deleting or refreshing the machine. This is a critical step for preserving the state of a VM so administrators can extract logs and investigate root causes.

  4. Question 4

    A multinational corporation has a Cloud Pod Architecture (CPA) setup with pods in London (Site A) and New York (Site B). A user physically located in London authenticates through the London Unified Access Gateway (UAG). However, they report high latency because they are consistently being routed to a virtual desktop in New York.

    The Global Entitlement is configured with the Scope set to 'All Sites', and the 'Use Home Site' feature is NOT enabled.

    What is the most likely reason the user is being routed to New York?

    Answer and explanation

    Correct answer: D

    In Cloud Pod Architecture, when a user launches a Global Entitlement with the scope 'All Sites' (and no Home Site preference), the broker first attempts to find an available desktop in the local pod (London). If the local pod is exhausted of capacity or in an error state, the broker fulfills the request by routing the user to another pod in the federation (New York) that has available resources.

  5. Question 5

    Multiple answers

    A Horizon administrator is monitoring an RDSH farm used for published applications. Users are complaining of severe lag. vCenter performance charts reveal that the ESXi hosts are under heavy CPU contention due to the RDSH VMs maxing out their allocated vCPUs.

    Select TWO optimal methods to mitigate this CPU bottleneck at the Horizon and vSphere levels. (Select TWO)

    Answer and explanation

    Correct answers: A, E

    Lowering the 'Max Sessions' limit prevents too many users from piling onto a single RDSH host. By distributing users across more hosts, the CPU load per VM is reduced.

    flowchart LR A[High CPU on RDSH] --> B{Action Taken} B --> C[Lower Max Sessions] B --> D[Enable Empty Session Timeout] C --> E[New users routed to other hosts] D --> F[Idle CPU cycles reclaimed] E --> G[CPU Load Normalized] F --> G

    Disconnected and idle sessions still consume CPU and memory resources. Aggressively logging off abandoned sessions frees up resources for active users.

  6. Question 6

    External users connecting through a Unified Access Gateway (UAG) report that their desktop launches, displays a completely black screen for about 10 seconds, and then abruptly disconnects. Internal users connecting directly to the Connection Servers do not experience this issue.

    Which of the following is the most likely cause of this behavior?

    Answer and explanation

    Correct answer: B

    A 10-second black screen followed by a disconnect is the classic symptom of a display protocol failure. The primary XML-API connection (TCP 443) succeeds (which is why the session attempts to launch), but the secondary display protocol connection (Blast on 8443 or PCoIP on 4172) is blocked by a firewall between the UAG and the VDI network.

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