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NVIDIA NCA-AIIO Bundle

Exam Code: NCA-AIIO

Exam Name NCA - AI Infrastructure and Operations

Certification Provider: NVIDIA

Corresponding Certification: NCA-AIIO

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NVIDIA NCA-AIIO Practice Test 91

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.

Question 901

At the Silverport regional data center, an operator interprets a passive DCGM health status as proof that every GPU can pass a sustained compute stress test. Which approach most directly resolves the reported issue?

  1. Inspect supported ECC and memory health indicators and follow fault triage procedures
  2. Coordinate workload scaling with GPU-capable node capacity and readiness checks where supported
  3. Collect scheduler allocation and job accounting by approved tenant or cost center
  4. Use passive DCGM health monitoring for observed incidents and active diagnostics when appropriate and safe

Explanation

Correct Answer

D:

The relevant weakness is that passive telemetry checks and active hardware workload tests provide different kinds of evidence. The best correction is to use passive DCGM health monitoring for observed incidents and active diagnostics when appropriate and safe. Evidence of success would be that the investigation records both monitored health state and a properly scheduled active test result. This directly addresses the reported issue at the Silverport regional data center.

Incorrect Answers

A:

The proposed action would be to inspect supported ECC and memory health indicators and follow fault triage procedures, which is relevant to ecc memory error signals. It would leave the main reported problem unresolved. For the Silverport regional data center, the priority is to use passive DCGM health monitoring for observed incidents and active diagnostics when appropriate and safe.

B:

The suggested implementation improves a different part of delivery. It does not directly address why passive telemetry checks and active hardware workload tests provide different kinds of evidence. For the Silverport regional data center, the priority is to use passive DCGM health monitoring for observed incidents and active diagnostics when appropriate and safe.

C:

This is appropriate in cases involving gpu job cost accounting, but the facts here call for the team to use passive DCGM health monitoring for observed incidents and active diagnostics when appropriate and safe. For the Silverport regional data center, the priority is to use passive DCGM health monitoring for observed incidents and active diagnostics when appropriate and safe.

Question 902

At the Silverport regional data center, an operator interprets a passive DCGM health status as proof that every GPU can pass a sustained compute stress test. Which technical or process problem best explains the failure?

  1. Data movement over the host interconnect can dominate end-to-end latency despite idle compute units
  2. Adding pod replicas does not create usable GPUs if the underlying cluster has no spare accelerator capacity
  3. Without bounded resource consumption a single tenant can monopolize shared GPUs
  4. Passive telemetry checks and active hardware workload tests provide different kinds of evidence

Explanation

Correct Answer

D:

This explanation matches the reported facts: passive telemetry checks and active hardware workload tests provide different kinds of evidence. A corrective test should establish that the investigation records both monitored health state and a properly scheduled active test result. This directly addresses the reported issue at the Silverport regional data center.

Incorrect Answers

A:

This is a possible failure mode in another workflow. The reported condition is better explained by the fact that passive telemetry checks and active hardware workload tests provide different kinds of evidence. For the Silverport regional data center, the priority is to use passive DCGM health monitoring for observed incidents and active diagnostics when appropriate and safe.

B:

That statement concerns ai workload autoscaling; here the reported facts point to a different issue: passive telemetry checks and active hardware workload tests provide different kinds of evidence. For the Silverport regional data center, the priority is to use passive DCGM health monitoring for observed incidents and active diagnostics when appropriate and safe.

C:

Without bounded resource consumption a single tenant can monopolize shared GPUs. This can occur in other projects, but it is not the primary explanation at the Silverport regional data center.

Question 903

At the Silverport regional data center, an operator interprets a passive DCGM health status as proof that every GPU can pass a sustained compute stress test. Which outcome provides the strongest verification?

  1. A topology and link test identifies the degraded path and verifies restoration after repair
  2. A controlled alarm generates a traceable incident and reaches the designated responder
  3. A mixed workload exercise demonstrates the expected priority and bounded waiting behavior
  4. The investigation records both monitored health state and a properly scheduled active test result

Explanation

Correct Answer

D:

The team needs direct evidence that the investigation records both monitored health state and a properly scheduled active test result. That result verifies whether the action to use passive DCGM health monitoring for observed incidents and active diagnostics when appropriate and safe has been effective. This directly addresses the reported issue at the Silverport regional data center.

Incorrect Answers

A:

The proposed proof concerns a different control: a topology and link test identifies the degraded path and verifies restoration after repair. It would not establish that the investigation records both monitored health state and a properly scheduled active test result. For the Silverport regional data center, the priority is to use passive DCGM health monitoring for observed incidents and active diagnostics when appropriate and safe.

B:

That observation can be useful for management alert ownership, but at the Silverport regional data center the required outcome is that the investigation records both monitored health state and a properly scheduled active test result.

C:

This test would not demonstrate that the identified weakness has been corrected. The necessary result is that the investigation records both monitored health state and a properly scheduled active test result. For the Silverport regional data center, the priority is to use passive DCGM health monitoring for observed incidents and active diagnostics when appropriate and safe.

Question 904

At the Silverport regional data center, an operator interprets a passive DCGM health status as proof that every GPU can pass a sustained compute stress test. What should the team review routinely to prevent this problem?

  1. Audit job and GPU identifier correlations after orchestration changes
  2. Coordinate disruptive diagnostics with the scheduler before isolating GPUs
  3. Reassess quota assignments and utilization as new tenants join
  4. Check host firmware IOMMU and guest driver compatibility during migrations

Explanation

Correct Answer

B:

This is the relevant recurring safeguard: coordinate disruptive diagnostics with the scheduler before isolating GPUs. It is tied directly to the observed failure mode rather than a separate system concern. This directly addresses the reported issue at the Silverport regional data center.

Incorrect Answers

A:

This maintenance work is reasonable for per-job telemetry attribution. The continuing exposure described here is that passive telemetry checks and active hardware workload tests provide different kinds of evidence. For the Silverport regional data center, the priority is to use passive DCGM health monitoring for observed incidents and active diagnostics when appropriate and safe.

C:

This routine applies to multi-tenant namespace quotas, but it does not maintain the specific correction needed for the problem at the Silverport regional data center.

D:

That practice helps control a different risk: a VM needs an explicit supported device assignment to use the physical GPU for compute. The recurring control here should be to coordinate disruptive diagnostics with the scheduler before isolating GPUs. For the Silverport regional data center, the priority is to use passive DCGM health monitoring for observed incidents and active diagnostics when appropriate and safe.

Question 905

At the Elmhurst GPU hosting business, a numerical kernel uses little compute but spends time fetching large arrays and the team assumes arithmetic units are the bottleneck. Which corrective action best addresses this situation?

  1. Correlate Xid events with the affected GPU job driver and platform health evidence
  2. Enforce suitable virtual GPU profile limits and admission planning for the tenant workload
  3. Profile memory throughput and access behavior before optimizing the GPU kernel
  4. Separate host GPU administration privileges from guest workload access

Explanation

Correct Answer

C:

This change targets the source of the problem instead of a side effect. Because a workload can be constrained by device memory bandwidth rather than arithmetic capacity, the team should profile memory throughput and access behavior before optimizing the GPU kernel. The most useful check is that a controlled kernel profile identifies memory traffic as the limiting factor and validates an improvement. This directly addresses the reported issue at the Elmhurst GPU hosting business.

Incorrect Answers

A:

That change could address xid error investigation, but it does not resolve the specific weakness here: a workload can be constrained by device memory bandwidth rather than arithmetic capacity. For the Elmhurst GPU hosting business, the priority is to profile memory throughput and access behavior before optimizing the GPU kernel.

B:

This option deals with a related concern where virtualization cannot provide unlimited physical GPU memory capacity to simultaneous applications. The case at the Elmhurst GPU hosting business instead requires the correction to profile memory throughput and access behavior before optimizing the GPU kernel.

D:

The suggested implementation improves a different part of delivery. It does not directly address why a workload can be constrained by device memory bandwidth rather than arithmetic capacity. For the Elmhurst GPU hosting business, the priority is to profile memory throughput and access behavior before optimizing the GPU kernel.

Question 906

At the Elmhurst GPU hosting business, a numerical kernel uses little compute but spends time fetching large arrays and the team assumes arithmetic units are the bottleneck. Which issue is most directly indicated by the facts?

  1. Fleet-level metrics alone cannot assign resource demand to individual workloads
  2. Kubernetes needs an advertised accelerator resource and proper scheduling constraints to place GPU workloads
  3. A workload can be constrained by device memory bandwidth rather than arithmetic capacity
  4. A guest's metrics may not reveal host thermal faults or other tenants' competing resource use

Explanation

Correct Answer

C:

This is the most direct cause because a workload can be constrained by device memory bandwidth rather than arithmetic capacity. The team can address it by choosing to profile memory throughput and access behavior before optimizing the GPU kernel. This directly addresses the reported issue at the Elmhurst GPU hosting business.

Incorrect Answers

A:

This explanation belongs to per-job telemetry attribution. The immediate weakness in the question is that a workload can be constrained by device memory bandwidth rather than arithmetic capacity. For the Elmhurst GPU hosting business, the priority is to profile memory throughput and access behavior before optimizing the GPU kernel.

B:

Although Kubernetes needs an advertised accelerator resource and proper scheduling constraints to place GPU workloads, the situation does not describe that specific cause; it instead indicates that a workload can be constrained by device memory bandwidth rather than arithmetic capacity. For the Elmhurst GPU hosting business, the priority is to profile memory throughput and access behavior before optimizing the GPU kernel.

D:

That statement concerns virtualized gpu monitoring; here the reported facts point to a different issue: a workload can be constrained by device memory bandwidth rather than arithmetic capacity. For the Elmhurst GPU hosting business, the priority is to profile memory throughput and access behavior before optimizing the GPU kernel.

Question 907

At the Elmhurst GPU hosting business, a numerical kernel uses little compute but spends time fetching large arrays and the team assumes arithmetic units are the bottleneck. Which test result would verify the intended improvement?

  1. A controlled kernel profile identifies memory traffic as the limiting factor and validates an improvement
  2. A representative trace attributes delay to transfers and shows the impact of a corrected data path
  3. A controlled alarm generates a traceable incident and reaches the designated responder
  4. Each eligible guest receives its approved virtual GPU capacity and runs a compatible workload

Explanation

Correct Answer

A:

The team needs direct evidence that a controlled kernel profile identifies memory traffic as the limiting factor and validates an improvement. That result verifies whether the action to profile memory throughput and access behavior before optimizing the GPU kernel has been effective. This directly addresses the reported issue at the Elmhurst GPU hosting business.

Incorrect Answers

B:

This result would test pcie transfer bottlenecks, not the failure described here. The more direct evidence is that a controlled kernel profile identifies memory traffic as the limiting factor and validates an improvement. For the Elmhurst GPU hosting business, the priority is to profile memory throughput and access behavior before optimizing the GPU kernel.

C:

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 controlled kernel profile identifies memory traffic as the limiting factor and validates an improvement. For the Elmhurst GPU hosting business, the priority is to profile memory throughput and access behavior before optimizing the GPU kernel.

D:

That observation can be useful for nvidia vgpu sharing, but at the Elmhurst GPU hosting business the required outcome is that a controlled kernel profile identifies memory traffic as the limiting factor and validates an improvement.

Question 908

At the Elmhurst GPU hosting business, a numerical kernel uses little compute but spends time fetching large arrays and the team assumes arithmetic units are the bottleneck. How should the team reduce the chance of the issue recurring?

  1. Review peak device memory whenever batch size or model version changes
  2. Audit job resource requests and allocation policy each time node count changes
  3. Reassess memory access patterns when tensors or algorithms change
  4. Review software component responsibilities during cluster design changes

Explanation

Correct Answer

C:

After the immediate fix, the priority is to reassess memory access patterns when tensors or algorithms change. This reinforces the control against the original weakness: a workload can be constrained by device memory bandwidth rather than arithmetic capacity. This directly addresses the reported issue at the Elmhurst GPU hosting business.

Incorrect Answers

A:

That practice helps control a different risk: compute activity and allocated framebuffer memory are different measurements. The recurring control here should be to reassess memory access patterns when tensors or algorithms change. For the Elmhurst GPU hosting business, the priority is to profile memory throughput and access behavior before optimizing the GPU kernel.

B:

The alternative suggests that the team audit job resource requests and allocation policy each time node count changes; it would not directly prevent the observed issue from returning. For the Elmhurst GPU hosting business, the priority is to profile memory throughput and access behavior before optimizing the GPU kernel.

D:

This does not address the failure mode over time. The better ongoing practice is to reassess memory access patterns when tensors or algorithms change. For the Elmhurst GPU hosting business, the priority is to profile memory throughput and access behavior before optimizing the GPU kernel.

Question 909

At the Riverbrook high-performance computing center, a shared GPU node shows high power usage but administrators cannot identify which scheduled project caused the load. Which implementation change is the most appropriate?

  1. Observe GPU power telemetry and supported performance or power limit reasons during the workload
  2. Use supported NVIDIA DCGM monitoring integrated with the cluster's telemetry system
  3. Plan partition reconfiguration during a controlled maintenance window with workload coordination
  4. Correlate device utilization and process accounting with approved scheduler job identifiers

Explanation

Correct Answer

D:

For the Riverbrook high-performance computing center, correlate device utilization and process accounting with approved scheduler job identifiers addresses the actual exposure: fleet-level metrics alone cannot assign resource demand to individual workloads. To verify the change, confirm that a completed test job shows a matching allocation and device-use record for the correct project.

Incorrect Answers

A:

The suggested implementation improves a different part of delivery. It does not directly address why fleet-level metrics alone cannot assign resource demand to individual workloads. For the Riverbrook high-performance computing center, the priority is to correlate device utilization and process accounting with approved scheduler job identifiers.

B:

This is appropriate in cases involving dcgm central monitoring use, but the facts here call for the team to correlate device utilization and process accounting with approved scheduler job identifiers. For the Riverbrook high-performance computing center, the priority is to correlate device utilization and process accounting with approved scheduler job identifiers.

C:

That change could address mig reconfiguration disruption, but it does not resolve the specific weakness here: fleet-level metrics alone cannot assign resource demand to individual workloads. For the Riverbrook high-performance computing center, the priority is to correlate device utilization and process accounting with approved scheduler job identifiers.

Question 910

At the Riverbrook high-performance computing center, a shared GPU node shows high power usage but administrators cannot identify which scheduled project caused the load. Which statement best identifies the control gap?

  1. Fleet-level metrics alone cannot assign resource demand to individual workloads
  2. Power policy or supply constraints can affect accelerator clocks and sustained performance
  3. A compatible physical GPU alone does not establish that a particular guest virtualization combination is supported
  4. Without resource usage records teams cannot evaluate real consumption or fair capacity sharing

Explanation

Correct Answer

A:

The situation indicates that fleet-level metrics alone cannot assign resource demand to individual workloads. The recommended response is to correlate device utilization and process accounting with approved scheduler job identifiers, with a follow-up check that a completed test job shows a matching allocation and device-use record for the correct project. This directly addresses the reported issue at the Riverbrook high-performance computing 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 Riverbrook high-performance computing center.

C:

This explanation belongs to gpu virtualization compatibility. The immediate weakness in the question is that fleet-level metrics alone cannot assign resource demand to individual workloads. For the Riverbrook high-performance computing center, the priority is to correlate device utilization and process accounting with approved scheduler job identifiers.

D:

Although without resource usage records teams cannot evaluate real consumption or fair capacity sharing, the situation does not describe that specific cause; it instead indicates that fleet-level metrics alone cannot assign resource demand to individual workloads. For the Riverbrook high-performance computing center, the priority is to correlate device utilization and process accounting with approved scheduler job identifiers.