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Exam Code: NCA-AIIO

Exam Name NCA - AI Infrastructure and Operations

Certification Provider: NVIDIA

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NVIDIA NCA-AIIO Practice Test 90

Question 890

At the Birchhaven medical imaging research center, CUDA applications crash intermittently and the team ignores NVIDIA driver Xid messages in host logs. Which technical or process problem best explains the failure?

  1. Driver-reported GPU errors provide diagnostic context beyond the application's final exception
  2. Power policy or supply constraints can affect accelerator clocks and sustained performance
  3. A shared pool needs allocation fairness beyond first-come manual occupation of devices
  4. Kubernetes accelerator access depends on multiple coordinated host and cluster software components

Explanation

Correct Answer

A:

The situation indicates that driver-reported GPU errors provide diagnostic context beyond the application's final exception. The recommended response is to correlate Xid events with the affected GPU job driver and platform health evidence, with a follow-up check that an incident timeline links relevant device events to the failed job and a documented remediation decision. This directly addresses the reported issue at the Birchhaven medical imaging research center.

Incorrect Answers

B:

Power policy or supply constraints can affect accelerator clocks and sustained performance. This can occur in other projects, but it is not the primary explanation at the Birchhaven medical imaging research center.

C:

This explanation belongs to batch queue fairness. The immediate weakness in the question is that driver-reported GPU errors provide diagnostic context beyond the application's final exception. For the Birchhaven medical imaging research center, the priority is to correlate Xid events with the affected GPU job driver and platform health evidence.

D:

Although Kubernetes accelerator access depends on multiple coordinated host and cluster software components, the situation does not describe that specific cause; it instead indicates that driver-reported GPU errors provide diagnostic context beyond the application's final exception. For the Birchhaven medical imaging research center, the priority is to correlate Xid events with the affected GPU job driver and platform health evidence.

Question 891

At the Birchhaven medical imaging research center, CUDA applications crash intermittently and the team ignores NVIDIA driver Xid messages in host logs. Which outcome provides the strongest verification?

  1. A completed test job shows a matching allocation and device-use record for the correct project
  2. An incident timeline links relevant device events to the failed job and a documented remediation decision
  3. A post-maintenance inventory shows approved component versions and passes the intended smoke test
  4. A tenant VM can run its allowed compute job but cannot alter protected host GPU settings

Explanation

Correct Answer

B:

This observable test is appropriate because driver-reported GPU errors provide diagnostic context beyond the application's final exception. A successful result would establish that an incident timeline links relevant device events to the failed job and a documented remediation decision. This directly addresses the reported issue at the Birchhaven medical imaging research center.

Incorrect Answers

A:

That observation can be useful for per-job telemetry attribution, but at the Birchhaven medical imaging research center the required outcome is that an incident timeline links relevant device events to the failed job and a documented remediation decision.

C:

The stated evidence does not directly validate the intended change to correlate Xid events with the affected GPU job driver and platform health evidence. A suitable verification would establish that an incident timeline links relevant device events to the failed job and a documented remediation decision. For the Birchhaven medical imaging research center, the priority is to correlate Xid events with the affected GPU job driver and platform health evidence.

D:

This result would test gpu virtualization security boundaries, not the failure described here. The more direct evidence is that an incident timeline links relevant device events to the failed job and a documented remediation decision. For the Birchhaven medical imaging research center, the priority is to correlate Xid events with the affected GPU job driver and platform health evidence.

Question 892

At the Birchhaven medical imaging research center, CUDA applications crash intermittently and the team ignores NVIDIA driver Xid messages in host logs. What should the team review routinely to prevent this problem?

  1. Review repeated Xid patterns after driver and hardware service changes
  2. Track recurring ECC and row-remapping health indicators by device
  3. Review queue statistics and fair-share policy with stakeholder teams
  4. Reassess quota assignments and utilization as new tenants join

Explanation

Correct Answer

A:

This is the relevant recurring safeguard: review repeated Xid patterns after driver and hardware service changes. It is tied directly to the observed failure mode rather than a separate system concern. This directly addresses the reported issue at the Birchhaven medical imaging research center.

Incorrect Answers

B:

This routine applies to ecc memory error signals, but it does not maintain the specific correction needed for the problem at the Birchhaven medical imaging research center.

C:

That practice helps control a different risk: a shared pool needs allocation fairness beyond first-come manual occupation of devices. The recurring control here should be to review repeated Xid patterns after driver and hardware service changes. For the Birchhaven medical imaging research center, the priority is to correlate Xid events with the affected GPU job driver and platform health evidence.

D:

The alternative suggests that the team reassess quota assignments and utilization as new tenants join; it would not directly prevent the observed issue from returning. For the Birchhaven medical imaging research center, the priority is to correlate Xid events with the affected GPU job driver and platform health evidence.

Question 893

At the Oakport AI research laboratory, distributed GPU jobs slow down on one node but operators monitor only overall accelerator occupancy. Which corrective action best addresses this situation?

  1. Correlate device utilization and process accounting with approved scheduler job identifiers
  2. Inspect supported interconnect link status and error or throughput counters alongside collective performance
  3. Use supported NVIDIA DCGM monitoring integrated with the cluster's telemetry system
  4. Enforce suitable virtual GPU profile limits and admission planning for the tenant workload

Explanation

Correct Answer

B:

This change targets the source of the problem instead of a side effect. Because GPU peer communication defects may reduce job speed without changing nominal compute capacity, the team should inspect supported interconnect link status and error or throughput counters alongside collective performance. The most useful check is that a topology and link test identifies the degraded path and verifies restoration after repair. This directly addresses the reported issue at the Oakport AI research laboratory.

Incorrect Answers

A:

This option deals with a related concern where fleet-level metrics alone cannot assign resource demand to individual workloads. The case at the Oakport AI research laboratory instead requires the correction to inspect supported interconnect link status and error or throughput counters alongside collective performance.

C:

The suggested implementation improves a different part of delivery. It does not directly address why GPU peer communication defects may reduce job speed without changing nominal compute capacity. For the Oakport AI research laboratory, the priority is to inspect supported interconnect link status and error or throughput counters alongside collective performance.

D:

This is appropriate in cases involving gpu resource oversubscription, but the facts here call for the team to inspect supported interconnect link status and error or throughput counters alongside collective performance. For the Oakport AI research laboratory, the priority is to inspect supported interconnect link status and error or throughput counters alongside collective performance.

Question 894

At the Oakport AI research laboratory, distributed GPU jobs slow down on one node but operators monitor only overall accelerator occupancy. Which issue is most directly indicated by the facts?

  1. Passive telemetry checks and active hardware workload tests provide different kinds of evidence
  2. GPU peer communication defects may reduce job speed without changing nominal compute capacity
  3. Device firmware can affect stability and interaction with drivers and interconnects
  4. Virtualization cannot provide unlimited physical GPU memory capacity to simultaneous applications

Explanation

Correct Answer

B:

This is the most direct cause because GPU peer communication defects may reduce job speed without changing nominal compute capacity. The team can address it by choosing to inspect supported interconnect link status and error or throughput counters alongside collective performance. This directly addresses the reported issue at the Oakport AI research laboratory.

Incorrect Answers

A:

Although passive telemetry checks and active hardware workload tests provide different kinds of evidence, the situation does not describe that specific cause; it instead indicates that GPU peer communication defects may reduce job speed without changing nominal compute capacity. For the Oakport AI research laboratory, the priority is to inspect supported interconnect link status and error or throughput counters alongside collective performance.

C:

That statement concerns firmware version governance; here the reported facts point to a different issue: GPU peer communication defects may reduce job speed without changing nominal compute capacity. For the Oakport AI research laboratory, the priority is to inspect supported interconnect link status and error or throughput counters alongside collective performance.

D:

Virtualization cannot provide unlimited physical GPU memory capacity to simultaneous applications. This can occur in other projects, but it is not the primary explanation at the Oakport AI research laboratory.

Question 895

At the Oakport AI research laboratory, distributed GPU jobs slow down on one node but operators monitor only overall accelerator occupancy. Which test result would verify the intended improvement?

  1. A completed test job shows a matching allocation and device-use record for the correct project
  2. A controlled alarm generates a traceable incident and reaches the designated responder
  3. Concurrent test jobs receive permitted nonconflicting allocations and accurate queue state
  4. A topology and link test identifies the degraded path and verifies restoration after repair

Explanation

Correct Answer

D:

This observable test is appropriate because GPU peer communication defects may reduce job speed without changing nominal compute capacity. A successful result would establish that a topology and link test identifies the degraded path and verifies restoration after repair. This directly addresses the reported issue at the Oakport AI research laboratory.

Incorrect Answers

A:

This result would test per-job telemetry attribution, not the failure described here. The more direct evidence is that a topology and link test identifies the degraded path and verifies restoration after repair. For the Oakport AI research laboratory, the priority is to inspect supported interconnect link status and error or throughput counters alongside collective performance.

B:

The proposed proof concerns a different control: a controlled alarm generates a traceable incident and reaches the designated responder. It would not establish that a topology and link test identifies the degraded path and verifies restoration after repair. For the Oakport AI research laboratory, the priority is to inspect supported interconnect link status and error or throughput counters alongside collective performance.

C:

That observation can be useful for slurm gpu allocation essentials, but at the Oakport AI research laboratory the required outcome is that a topology and link test identifies the degraded path and verifies restoration after repair.

Question 896

At the Oakport AI research laboratory, distributed GPU jobs slow down on one node but operators monitor only overall accelerator occupancy. How should the team reduce the chance of the issue recurring?

  1. Review repeated Xid patterns after driver and hardware service changes
  2. Monitor link errors and collective timing after node maintenance
  3. Check host firmware IOMMU and guest driver compatibility during migrations
  4. Review operator and driver compatibility before Kubernetes upgrades

Explanation

Correct Answer

B:

After the immediate fix, the priority is to monitor link errors and collective timing after node maintenance. This reinforces the control against the original weakness: GPU peer communication defects may reduce job speed without changing nominal compute capacity. This directly addresses the reported issue at the Oakport AI research laboratory.

Incorrect Answers

A:

The alternative suggests that the team review repeated Xid patterns after driver and hardware service changes; it would not directly prevent the observed issue from returning. For the Oakport AI research laboratory, the priority is to inspect supported interconnect link status and error or throughput counters alongside collective performance.

C:

This does not address the failure mode over time. The better ongoing practice is to monitor link errors and collective timing after node maintenance. For the Oakport AI research laboratory, the priority is to inspect supported interconnect link status and error or throughput counters alongside collective performance.

D:

This routine applies to gpu operator lifecycle automation, but it does not maintain the specific correction needed for the problem at the Oakport AI research laboratory.

Question 897

At the Dartwood public-sector AI program, an inference workload repeatedly moves tensors between host and GPU while the dashboard displays only GPU compute utilization. Which implementation change is the most appropriate?

  1. Interpret GPU busy time alongside actual job throughput memory and communication metrics
  2. Measure host-device transfer rate latency and PCIe-related health where supported
  3. Configure supported PCIe GPU passthrough for a compatible host and guest where appropriate
  4. Coordinate preemption policy with checkpoint-aware jobs and recovery expectations

Explanation

Correct Answer

B:

The relevant weakness is that data movement over the host interconnect can dominate end-to-end latency despite idle compute units. The best correction is to measure host-device transfer rate latency and PCIe-related health where supported. Evidence of success would be that a representative trace attributes delay to transfers and shows the impact of a corrected data path. This directly addresses the reported issue at the Dartwood public-sector AI program.

Incorrect Answers

A:

This is appropriate in cases involving gpu utilization interpretation, but the facts here call for the team to measure host-device transfer rate latency and PCIe-related health where supported. For the Dartwood public-sector AI program, the priority is to measure host-device transfer rate latency and PCIe-related health where supported.

C:

This option deals with a related concern where a VM needs an explicit supported device assignment to use the physical GPU for compute. The case at the Dartwood public-sector AI program instead requires the correction to measure host-device transfer rate latency and PCIe-related health where supported.

D:

The proposed action would be to coordinate preemption policy with checkpoint-aware jobs and recovery expectations, which is relevant to job preemption and checkpoints. It would leave the main reported problem unresolved. For the Dartwood public-sector AI program, the priority is to measure host-device transfer rate latency and PCIe-related health where supported.

Question 898

At the Dartwood public-sector AI program, an inference workload repeatedly moves tensors between host and GPU while the dashboard displays only GPU compute utilization. Which statement best identifies the control gap?

  1. Fleet-level metrics alone cannot assign resource demand to individual workloads
  2. Insufficient historical evidence can hide the sequence leading to a hardware or workload failure
  3. Data movement over the host interconnect can dominate end-to-end latency despite idle compute units
  4. Uncoordinated device use can oversubscribe hardware and undermine accounting or job reliability

Explanation

Correct Answer

C:

The issue is not simply a failed task; data movement over the host interconnect can dominate end-to-end latency despite idle compute units. That is why the practical change is to measure host-device transfer rate latency and PCIe-related health where supported. This directly addresses the reported issue at the Dartwood public-sector AI program.

Incorrect Answers

A:

Fleet-level metrics alone cannot assign resource demand to individual workloads. This can occur in other projects, but it is not the primary explanation at the Dartwood public-sector AI program.

B:

This explanation belongs to telemetry retention and access. The immediate weakness in the question is that data movement over the host interconnect can dominate end-to-end latency despite idle compute units. For the Dartwood public-sector AI program, the priority is to measure host-device transfer rate latency and PCIe-related health where supported.

D:

This is a possible failure mode in another workflow. The reported condition is better explained by the fact that data movement over the host interconnect can dominate end-to-end latency despite idle compute units. For the Dartwood public-sector AI program, the priority is to measure host-device transfer rate latency and PCIe-related health where supported.

Question 899

At the Dartwood public-sector AI program, an inference workload repeatedly moves tensors between host and GPU while the dashboard displays only GPU compute utilization. Which observation would best confirm that the correction is effective?

  1. A completed test job shows a matching allocation and device-use record for the correct project
  2. A replaced GPU appears under the correct host with its updated device identity in the inventory
  3. A capacity report separates demand wait time from real utilization and identifies the bottleneck
  4. A representative trace attributes delay to transfers and shows the impact of a corrected data path

Explanation

Correct Answer

D:

This evidence checks the behavior that matters: a representative trace attributes delay to transfers and shows the impact of a corrected data path. It shows whether the correction addresses the risk that data movement over the host interconnect can dominate end-to-end latency despite idle compute units. This directly addresses the reported issue at the Dartwood public-sector AI program.

Incorrect Answers

A:

This test would not demonstrate that the identified weakness has been corrected. The necessary result is that a representative trace attributes delay to transfers and shows the impact of a corrected data path. For the Dartwood public-sector AI program, the priority is to measure host-device transfer rate latency and PCIe-related health where supported.

B:

The stated evidence does not directly validate the intended change to measure host-device transfer rate latency and PCIe-related health where supported. A suitable verification would establish that a representative trace attributes delay to transfers and shows the impact of a corrected data path. For the Dartwood public-sector AI program, the priority is to measure host-device transfer rate latency and PCIe-related health where supported.

C:

This result would test capacity planning from demand, not the failure described here. The more direct evidence is that a representative trace attributes delay to transfers and shows the impact of a corrected data path. For the Dartwood public-sector AI program, the priority is to measure host-device transfer rate latency and PCIe-related health where supported.

Question 900

At the Dartwood public-sector AI program, an inference workload repeatedly moves tensors between host and GPU while the dashboard displays only GPU compute utilization. What continuing safeguard is most appropriate?

  1. Audit job and GPU identifier correlations after orchestration changes
  2. Review profile availability and tenant isolation after host changes
  3. Profile host-device copies when inference request shapes change
  4. Reassess quota assignments and utilization as new tenants join

Explanation

Correct Answer

C:

This practice addresses future change, not just today’s incident. The team should profile host-device copies when inference request shapes change because data movement over the host interconnect can dominate end-to-end latency despite idle compute units. This directly addresses the reported issue at the Dartwood public-sector AI program.

Incorrect Answers

A:

This routine applies to per-job telemetry attribution, but it does not maintain the specific correction needed for the problem at the Dartwood public-sector AI program.

B:

That practice helps control a different risk: virtual GPU technology can divide supported physical accelerator capacity among isolated virtual machines. The recurring control here should be to profile host-device copies when inference request shapes change. For the Dartwood public-sector AI program, the priority is to measure host-device transfer rate latency and PCIe-related health where supported.

D:

This maintenance work is reasonable for multi-tenant namespace quotas. The continuing exposure described here is that data movement over the host interconnect can dominate end-to-end latency despite idle compute units. For the Dartwood public-sector AI program, the priority is to measure host-device transfer rate latency and PCIe-related health where supported.