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NCP-AII Questions & Answers
Exam Code: NCP-AII
Exam Name: NCP-AI Infrastructure
Certification Provider: NVIDIA
NCP-AII Premium File
170 Questions & Answers
Last Update: Nov 6, 2026
Includes questions types found on actual exam such as drag and drop, simulation, type in, and fill in the blank.
Verified by experts
NCP-AII Questions & Answers
Exam Code: NCP-AII
Exam Name: NCP-AI Infrastructure
Certification Provider: NVIDIA
NCP-AII Premium File
170 Questions & Answers
Last Update: Nov 6, 2026
Includes questions types found on actual exam such as drag and drop, simulation, type in, and fill in the blank.
$87.99
$79.99

NCP-AI Infrastructure NCP-AII Practice Test 42

Question 410

The implementation team reports that it has completed 'align HPL process affinity and memory placement with accelerator topology'. Which evidence should the acceptance reviewer request?

  1. each intended GPU shows work and aggregate HPL throughput meets baseline
  2. repeated throughput changes remain after matching power and clock conditions
  3. NUMA binding and benchmark throughput match qualified node baselines
  4. logs identify the correct accelerated libraries devices and comparable metrics

Explanation

Correct Answer

C:

Correct. This result validates the change in service conditions and is the closest evidence that NUMA locality causes cross-socket transfer and memory penalties is no longer causing the issue.

Incorrect Answers

A:

“each intended GPU shows work and aggregate HPL throughput meets baseline” addresses benchmark rank placement does not engage the intended GPU count, but the current hardware or infrastructure issue is nUMA locality causes cross-socket transfer and memory penalties. The option “NUMA binding and benchmark throughput match qualified node baselines” is more directly tied to the required outcome.

B:

“repeated throughput changes remain after matching power and clock conditions” addresses uncontrolled power policy confounds benchmark comparisons, but the current hardware or infrastructure issue is nUMA locality causes cross-socket transfer and memory penalties. The option “NUMA binding and benchmark throughput match qualified node baselines” is more directly tied to the required outcome.

D:

“logs identify the correct accelerated libraries devices and comparable metrics” addresses benchmark implementation and acceleration path are not comparable, but the current hardware or infrastructure issue is nUMA locality causes cross-socket transfer and memory penalties. The option “NUMA binding and benchmark throughput match qualified node baselines” is more directly tied to the required outcome.

Question 411

An NVIDIA infrastructure team reports this operational finding: an HPL configuration requires more device or host memory than a node has and the run terminates during allocation. Which action MOST directly addresses it?

  1. tune HPL problem size and process configuration to the available memory
  2. size HPL memory use to fit documented per-node capacity
  3. align HPL process affinity and memory placement with accelerator topology
  4. map HPL ranks and device assignments to all approved GPUs

Explanation

Correct Answer

B:

Correct. The incident follows from matrix problem dimensions exceed available resources. This action changes the failing dependency, with full HPL run completes without allocation failure and has a valid residual as a measurable success criterion.

Incorrect Answers

A:

Useful for benchmark working set does not exercise the intended accelerator capacity, but it does not remove the specific condition: matrix problem dimensions exceed available resources.

C:

“align HPL process affinity and memory placement with accelerator topology” addresses nUMA locality causes cross-socket transfer and memory penalties, but the current hardware or infrastructure issue is matrix problem dimensions exceed available resources. The option “size HPL memory use to fit documented per-node capacity” is more directly tied to the required outcome.

D:

“map HPL ranks and device assignments to all approved GPUs” addresses benchmark rank placement does not engage the intended GPU count, but the current hardware or infrastructure issue is matrix problem dimensions exceed available resources. The option “size HPL memory use to fit documented per-node capacity” is more directly tied to the required outcome.

Question 412

An engineer claims the change 'size HPL memory use to fit documented per-node capacity' restored readiness. Which measurable test result would substantiate that claim?

  1. full HPL run completes without allocation failure and has a valid residual
  2. HPL output reports a valid solution with performance measurements
  3. each intended GPU shows work and aggregate HPL throughput meets baseline
  4. measured FLOPS increase while residual accuracy remains acceptable

Explanation

Correct Answer

A:

Correct. This result validates the change in service conditions and is the closest evidence that matrix problem dimensions exceed available resources is no longer causing the issue.

Incorrect Answers

B:

“HPL output reports a valid solution with performance measurements” addresses hPL numerical result validation was ignored in favor of process completion, but the current hardware or infrastructure issue is matrix problem dimensions exceed available resources. The option “full HPL run completes without allocation failure and has a valid residual” is more directly tied to the required outcome.

C:

“each intended GPU shows work and aggregate HPL throughput meets baseline” addresses benchmark rank placement does not engage the intended GPU count, but the current hardware or infrastructure issue is matrix problem dimensions exceed available resources. The option “full HPL run completes without allocation failure and has a valid residual” is more directly tied to the required outcome.

D:

“measured FLOPS increase while residual accuracy remains acceptable” addresses benchmark working set does not exercise the intended accelerator capacity, but the current hardware or infrastructure issue is matrix problem dimensions exceed available resources. The option “full HPL run completes without allocation failure and has a valid residual” is more directly tied to the required outcome.

Question 413

A validation report notes: an operator compares HPL runs using different GPU power caps and concludes the new driver is faster. What is the MOST defensible next action?

  1. hold GPU power limits and workload configuration constant across HPL tests
  2. specify and validate the supported HPL implementation and GPU execution configuration
  3. tune HPL problem size and process configuration to the available memory
  4. map HPL ranks and device assignments to all approved GPUs

Explanation

Correct Answer

A:

Correct. The underlying problem is uncontrolled power policy confounds benchmark comparisons. This intervention targets that mechanism. Confirm completion through repeated throughput changes remain after matching power and clock conditions.

Incorrect Answers

B:

“specify and validate the supported HPL implementation and GPU execution configuration” addresses benchmark implementation and acceleration path are not comparable, but the current hardware or infrastructure issue is uncontrolled power policy confounds benchmark comparisons. The option “hold GPU power limits and workload configuration constant across HPL tests” is more directly tied to the required outcome.

C:

Useful for benchmark working set does not exercise the intended accelerator capacity, but it does not remove the specific condition: uncontrolled power policy confounds benchmark comparisons.

D:

“map HPL ranks and device assignments to all approved GPUs” addresses benchmark rank placement does not engage the intended GPU count, but the current hardware or infrastructure issue is uncontrolled power policy confounds benchmark comparisons. The option “hold GPU power limits and workload configuration constant across HPL tests” is more directly tied to the required outcome.

Question 414

The site has performed 'hold GPU power limits and workload configuration constant across HPL tests'. Which direct result is needed to close this issue rather than merely check a configuration?

  1. steady-state GFLOPS and clocks remain stable within accepted tolerances
  2. repeated throughput changes remain after matching power and clock conditions
  3. each intended GPU shows work and aggregate HPL throughput meets baseline
  4. logs identify the correct accelerated libraries devices and comparable metrics

Explanation

Correct Answer

B:

Correct. The test directly checks whether uncontrolled power policy confounds benchmark comparisons has been remediated. That result supports operational acceptance rather than only configuration presence.

Incorrect Answers

A:

“steady-state GFLOPS and clocks remain stable within accepted tolerances” addresses thermal throttling skews the benchmark sustained-performance result, but the current hardware or infrastructure issue is uncontrolled power policy confounds benchmark comparisons. The option “repeated throughput changes remain after matching power and clock conditions” is more directly tied to the required outcome.

C:

“each intended GPU shows work and aggregate HPL throughput meets baseline” addresses benchmark rank placement does not engage the intended GPU count, but the current hardware or infrastructure issue is uncontrolled power policy confounds benchmark comparisons. The option “repeated throughput changes remain after matching power and clock conditions” is more directly tied to the required outcome.

D:

“logs identify the correct accelerated libraries devices and comparable metrics” addresses benchmark implementation and acceleration path are not comparable, but the current hardware or infrastructure issue is uncontrolled power policy confounds benchmark comparisons. The option “repeated throughput changes remain after matching power and clock conditions” is more directly tied to the required outcome.

Question 415

A large HPL benchmark appears fast but its result cannot be reproduced because grid dimensions and input files were discarded. Which corrective action is MOST appropriate before commissioning can proceed?

  1. tune HPL problem size and process configuration to the available memory
  2. record HPL.dat matrix process grid versions and device binding
  3. align HPL process affinity and memory placement with accelerator topology
  4. hold GPU power limits and workload configuration constant across HPL tests

Explanation

Correct Answer

B:

Correct. The incident follows from performance evidence lacks a complete repeatable benchmark configuration. This action changes the failing dependency, with an independent rerun reproduces accepted FLOPS within tolerance as a measurable success criterion.

Incorrect Answers

A:

Useful for benchmark working set does not exercise the intended accelerator capacity, but it does not remove the specific condition: performance evidence lacks a complete repeatable benchmark configuration.

C:

“align HPL process affinity and memory placement with accelerator topology” addresses nUMA locality causes cross-socket transfer and memory penalties, but the current hardware or infrastructure issue is performance evidence lacks a complete repeatable benchmark configuration. The option “record HPL.dat matrix process grid versions and device binding” is more directly tied to the required outcome.

D:

“hold GPU power limits and workload configuration constant across HPL tests” addresses uncontrolled power policy confounds benchmark comparisons, but the current hardware or infrastructure issue is performance evidence lacks a complete repeatable benchmark configuration. The option “record HPL.dat matrix process grid versions and device binding” is more directly tied to the required outcome.

Question 416

The implementation team reports that it has completed 'record HPL.dat matrix process grid versions and device binding'. Which evidence should the acceptance reviewer request?

  1. steady-state GFLOPS and clocks remain stable within accepted tolerances
  2. measured FLOPS increase while residual accuracy remains acceptable
  3. repeated throughput changes remain after matching power and clock conditions
  4. an independent rerun reproduces accepted FLOPS within tolerance

Explanation

Correct Answer

D:

Correct. The test directly checks whether performance evidence lacks a complete repeatable benchmark configuration has been remediated. That result supports operational acceptance rather than only configuration presence.

Incorrect Answers

A:

“steady-state GFLOPS and clocks remain stable within accepted tolerances” addresses thermal throttling skews the benchmark sustained-performance result, but the current hardware or infrastructure issue is performance evidence lacks a complete repeatable benchmark configuration. The option “an independent rerun reproduces accepted FLOPS within tolerance” is more directly tied to the required outcome.

B:

“measured FLOPS increase while residual accuracy remains acceptable” addresses benchmark working set does not exercise the intended accelerator capacity, but the current hardware or infrastructure issue is performance evidence lacks a complete repeatable benchmark configuration. The option “an independent rerun reproduces accepted FLOPS within tolerance” is more directly tied to the required outcome.

C:

“repeated throughput changes remain after matching power and clock conditions” addresses uncontrolled power policy confounds benchmark comparisons, but the current hardware or infrastructure issue is performance evidence lacks a complete repeatable benchmark configuration. The option “an independent rerun reproduces accepted FLOPS within tolerance” is more directly tied to the required outcome.

Question 417

An NVIDIA infrastructure team reports this operational finding: hPL achieves expected throughput initially but steadily degrades as GPU inlet temperature rises during a long run. Which action MOST directly addresses it?

  1. map HPL ranks and device assignments to all approved GPUs
  2. specify and validate the supported HPL implementation and GPU execution configuration
  3. measure thermals and maintain approved cooling throughout HPL execution
  4. tune HPL problem size and process configuration to the available memory

Explanation

Correct Answer

C:

Correct. This directly resolves thermal throttling skews the benchmark sustained-performance result. A valid handover should also demonstrate steady-state GFLOPS and clocks remain stable within accepted tolerances.

Incorrect Answers

A:

“map HPL ranks and device assignments to all approved GPUs” addresses benchmark rank placement does not engage the intended GPU count, but the current hardware or infrastructure issue is thermal throttling skews the benchmark sustained-performance result. The option “measure thermals and maintain approved cooling throughout HPL execution” is more directly tied to the required outcome.

B:

“specify and validate the supported HPL implementation and GPU execution configuration” addresses benchmark implementation and acceleration path are not comparable, but the current hardware or infrastructure issue is thermal throttling skews the benchmark sustained-performance result. The option “measure thermals and maintain approved cooling throughout HPL execution” is more directly tied to the required outcome.

D:

“tune HPL problem size and process configuration to the available memory” addresses benchmark working set does not exercise the intended accelerator capacity, but the current hardware or infrastructure issue is thermal throttling skews the benchmark sustained-performance result. The option “measure thermals and maintain approved cooling throughout HPL execution” is more directly tied to the required outcome.

Question 418

An engineer claims the change 'measure thermals and maintain approved cooling throughout HPL execution' restored readiness. Which measurable test result would substantiate that claim?

  1. an independent rerun reproduces accepted FLOPS within tolerance
  2. repeated throughput changes remain after matching power and clock conditions
  3. each intended GPU shows work and aggregate HPL throughput meets baseline
  4. steady-state GFLOPS and clocks remain stable within accepted tolerances

Explanation

Correct Answer

D:

Correct. This is observable proof for the intended change, not just evidence that a command was issued. It establishes steady-state GFLOPS and clocks remain stable within accepted tolerances, addressing thermal throttling skews the benchmark sustained-performance result.

Incorrect Answers

A:

“an independent rerun reproduces accepted FLOPS within tolerance” addresses performance evidence lacks a complete repeatable benchmark configuration, but the current hardware or infrastructure issue is thermal throttling skews the benchmark sustained-performance result. The option “steady-state GFLOPS and clocks remain stable within accepted tolerances” is more directly tied to the required outcome.

B:

“repeated throughput changes remain after matching power and clock conditions” addresses uncontrolled power policy confounds benchmark comparisons, but the current hardware or infrastructure issue is thermal throttling skews the benchmark sustained-performance result. The option “steady-state GFLOPS and clocks remain stable within accepted tolerances” is more directly tied to the required outcome.

C:

“each intended GPU shows work and aggregate HPL throughput meets baseline” addresses benchmark rank placement does not engage the intended GPU count, but the current hardware or infrastructure issue is thermal throttling skews the benchmark sustained-performance result. The option “steady-state GFLOPS and clocks remain stable within accepted tolerances” is more directly tied to the required outcome.

Question 419

A validation report notes: a benchmark team compares HPL scores from a CPU-only run with a GPU-accelerated baseline without stating which variant was executed. What is the MOST defensible next action?

  1. specify and validate the supported HPL implementation and GPU execution configuration
  2. tune HPL problem size and process configuration to the available memory
  3. hold GPU power limits and workload configuration constant across HPL tests
  4. measure thermals and maintain approved cooling throughout HPL execution

Explanation

Correct Answer

A:

Correct. This directly resolves benchmark implementation and acceleration path are not comparable. A valid handover should also demonstrate logs identify the correct accelerated libraries devices and comparable metrics.

Incorrect Answers

B:

“tune HPL problem size and process configuration to the available memory” addresses benchmark working set does not exercise the intended accelerator capacity, but the current hardware or infrastructure issue is benchmark implementation and acceleration path are not comparable. The option “specify and validate the supported HPL implementation and GPU execution configuration” is more directly tied to the required outcome.

C:

“hold GPU power limits and workload configuration constant across HPL tests” addresses uncontrolled power policy confounds benchmark comparisons, but the current hardware or infrastructure issue is benchmark implementation and acceleration path are not comparable. The option “specify and validate the supported HPL implementation and GPU execution configuration” is more directly tied to the required outcome.

D:

“measure thermals and maintain approved cooling throughout HPL execution” addresses thermal throttling skews the benchmark sustained-performance result, but the current hardware or infrastructure issue is benchmark implementation and acceleration path are not comparable. The option “specify and validate the supported HPL implementation and GPU execution configuration” is more directly tied to the required outcome.

Question 420

During a readiness assessment, a local eight-GPU NCCL all-reduce runs far below baseline and NVLink diagnostics report two required peer links down. Which correction should be prioritized?

  1. pin qualified NCCL version and algorithm settings for baseline runs
  2. use the documented NCCL algbw and busbw definitions when assessing limits
  3. restore failed NVLink peer paths and repeat an all-GPU NCCL test
  4. check unique rank mapping and supported local collective configuration

Explanation

Correct Answer

C:

Correct. This is the corrective step for required intra-node NVLink paths are not operational; it addresses the failure at its source. The confirming observation is local NCCL throughput and all required peer links meet the HGX baseline.

Incorrect Answers

A:

“pin qualified NCCL version and algorithm settings for baseline runs” addresses benchmark software and algorithm differences invalidate performance comparison, but the current hardware or infrastructure issue is required intra-node NVLink paths are not operational. The option “restore failed NVLink peer paths and repeat an all-GPU NCCL test” is more directly tied to the required outcome.

B:

“use the documented NCCL algbw and busbw definitions when assessing limits” addresses benchmark metrics were interpreted without understanding collective data movement, but the current hardware or infrastructure issue is required intra-node NVLink paths are not operational. The option “restore failed NVLink peer paths and repeat an all-GPU NCCL test” is more directly tied to the required outcome.

D:

Useful for local rank and GPU device assignments are inconsistent at full cardinality, but it does not remove the specific condition: required intra-node NVLink paths are not operational.

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