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Exam Code: NCP-AII

Exam Name: NCP-AI Infrastructure

Certification Provider: NVIDIA

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NVIDIA NCP-AII Practice Test 29

Question 280

During a GPU datacenter maintenance window, an engineer discovers: A BlueField DPU application fails after the host updates DOCA packages, while the DPU firmware and embedded software versions remain from an earlier release. Which repeatable operational safeguard best prevents recurrence of this failure?

  1. Maintain tested host/DPU driver and DOCA version pairings with a documented recovery path.
  2. Enforce job draining, module state checks, and postchange CUDA health gates before driver maintenance.
  3. Test NVIDIA kernel module signing and reload behavior under each supported secure host image update.
  4. Cross-check scheduler GRES inventory against NVIDIA SMI discovery after every node image or hardware change.

Explanation

Correct Answer

A:

This preventive practice addresses the underlying failure (Host and DPU components form a coupled software stack; isolated upgrades can break offload services.) and supports continued assurance through: A supported DOCA sample completes end-to-end and both host and DPU report the approved paired software baseline.

Incorrect Answers

B:

This prevention control targets another operational risk: An operator removes the NVIDIA driver while GPU containers are still running, leaving orphaned jobs and an inconsistent module state across the node. The currently reported mechanism remains: Host and DPU components form a coupled software stack; isolated upgrades can break offload services.

C:

This prevention control targets another operational risk: A security patch changes the host kernel and Secure Boot settings, and the NVIDIA GPU module stops loading despite the device remaining visible on PCIe. The currently reported mechanism remains: Host and DPU components form a coupled software stack; isolated upgrades can break offload services.

D:

This prevention control targets another operational risk: An AI job runs on one compute node, but Slurm cannot distribute it because GPU resources are absent from the scheduler's generic resource definitions. The currently reported mechanism remains: Host and DPU components form a coupled software stack; isolated upgrades can break offload services.

Question 281

A GPU cluster commissioning engineer investigates this situation: An operator removes the NVIDIA driver while GPU containers are still running, leaving orphaned jobs and an inconsistent module state across the node. Which corrective deployment or operational action best addresses the stated problem?

  1. Reinstall the approved signed NVIDIA driver distribution through a controlled artifact repository and record package provenance.
  2. Drain the scheduler node, stop GPU workloads, and use the supported driver removal or update workflow followed by validation.
  3. Verify driver module signing and compatibility with the approved Secure Boot and kernel policy before reinstalling packages.
  4. Design and verify BCM high availability with supported redundant management services and resilient state storage.

Explanation

Correct Answer

B:

For the stated NVIDIA AI infrastructure condition (An operator removes the NVIDIA driver while GPU containers are still running, leaving orphaned jobs and an inconsistent module state across the node.), this action addresses the concrete failure: Drain the scheduler node, stop GPU workloads, and use the supported driver removal or update workflow followed by validation. The underlying mechanism is: Active GPU processes can retain device handles and prevent safe driver module transitions. Verification would require: The driver is replaced with no live job disruption and the node passes GPU enumeration and workload smoke tests before reopening scheduling.

Incorrect Answers

A:

This option could be appropriate for a different NVIDIA infrastructure problem (3.4: Install, update, and remove NVIDIA GPU and DOCA drivers): GPU health tests fail because the driver package on a server was installed from an untrusted repository, and management cannot reproduce its package dependencies. The present issue is more specifically caused by: Active GPU processes can retain device handles and prevent safe driver module transitions.

C:

This option could be appropriate for a different NVIDIA infrastructure problem (3.4: Install, update, and remove NVIDIA GPU and DOCA drivers): A security patch changes the host kernel and Secure Boot settings, and the NVIDIA GPU module stops loading despite the device remaining visible on PCIe. The present issue is more specifically caused by: Active GPU processes can retain device handles and prevent safe driver module transitions.

D:

This option could be appropriate for a different NVIDIA infrastructure problem (3.1: Install Base Command Manager and configure and verify high availability): Base Command Manager is installed on a management node but the cluster database is stored only on a single local disk, and leadership claims the control plane is highly available. The present issue is more specifically caused by: Active GPU processes can retain device handles and prevent safe driver module transitions.

Question 282

A GPU cluster commissioning engineer investigates this situation: An operator removes the NVIDIA driver while GPU containers are still running, leaving orphaned jobs and an inconsistent module state across the node. Which measured result most directly proves that this specific problem is resolved?

  1. The driver is replaced with no live job disruption and the node passes GPU enumeration and workload smoke tests before reopening scheduling.
  2. The package manifest identifies trusted origin, the driver loads cleanly, and a representative workload completes with recorded versions.
  3. A known CUDA sample and `nvidia-smi` both run successfully on the approved kernel and the remaining fleet retains known-good operation.
  4. A negative tenant test cannot enumerate unauthorized accelerators while the permitted device runs the expected workload.

Explanation

Correct Answer

A:

This is the measurable acceptance result for the described case: The driver is replaced with no live job disruption and the node passes GPU enumeration and workload smoke tests before reopening scheduling. It validates the corrective operation (Drain the scheduler node, stop GPU workloads, and use the supported driver removal or update workflow followed by validation.) rather than a related but different system check.

Incorrect Answers

B:

This observation would help verify a different incident: GPU health tests fail because the driver package on a server was installed from an untrusted repository, and management cannot reproduce its package dependencies. It does not directly establish the required result for the current case: The driver is replaced with no live job disruption and the node passes GPU enumeration and workload smoke tests before reopening scheduling.

C:

This observation would help verify a different incident: A new NVIDIA driver is installed on every host without checking its supported CUDA runtime and kernel module compatibility, leading to failed CUDA initialization. It does not directly establish the required result for the current case: The driver is replaced with no live job disruption and the node passes GPU enumeration and workload smoke tests before reopening scheduling.

D:

This observation would help verify a different incident: A container in a multi-tenant GPU cluster can see accelerators allocated to another job because the runtime launches with unrestricted device exposure. It does not directly establish the required result for the current case: The driver is replaced with no live job disruption and the node passes GPU enumeration and workload smoke tests before reopening scheduling.

Question 283

A GPU cluster commissioning engineer investigates this situation: An operator removes the NVIDIA driver while GPU containers are still running, leaving orphaned jobs and an inconsistent module state across the node. Which root cause or infrastructure principle best explains the observed failure?

  1. Active GPU processes can retain device handles and prevent safe driver module transitions.
  2. Kernel module authentication can block driver initialization even when the physical accelerator is present and healthy.
  3. Host and DPU components form a coupled software stack; isolated upgrades can break offload services.
  4. Registry credentials are privileged secrets and hard-coded personal tokens create both disclosure and continuity risk.

Explanation

Correct Answer

A:

This technical mechanism explains the reported condition: Active GPU processes can retain device handles and prevent safe driver module transitions. The observed situation is: An operator removes the NVIDIA driver while GPU containers are still running, leaving orphaned jobs and an inconsistent module state across the node. A requirement-aligned correction is: Drain the scheduler node, stop GPU workloads, and use the supported driver removal or update workflow followed by validation.

Incorrect Answers

B:

This underlying cause is associated with another GPU platform incident: A security patch changes the host kernel and Secure Boot settings, and the NVIDIA GPU module stops loading despite the device remaining visible on PCIe. The observed case instead concerns: Active GPU processes can retain device handles and prevent safe driver module transitions.

C:

This underlying cause is associated with another GPU platform incident: A BlueField DPU application fails after the host updates DOCA packages, while the DPU firmware and embedded software versions remain from an earlier release. The observed case instead concerns: Active GPU processes can retain device handles and prevent safe driver module transitions.

D:

This underlying cause is associated with another GPU platform incident: A training team scripts NGC pulls by embedding a personal API key directly in shell history and a Git repository, compromising a long-lived registry credential. The observed case instead concerns: Active GPU processes can retain device handles and prevent safe driver module transitions.

Question 284

A GPU cluster commissioning engineer investigates this situation: An operator removes the NVIDIA driver while GPU containers are still running, leaving orphaned jobs and an inconsistent module state across the node. Which repeatable operational safeguard best prevents recurrence of this failure?

  1. Pin tested driver, CUDA, and kernel versions in host image change controls.
  2. Standardize trusted package distribution and audit installed GPU/DOCA driver hashes and versions.
  3. Audit toolkit runtime settings and perform multi-node container smoke tests during fleet rollouts.
  4. Enforce job draining, module state checks, and postchange CUDA health gates before driver maintenance.

Explanation

Correct Answer

D:

This preventive practice addresses the underlying failure (Active GPU processes can retain device handles and prevent safe driver module transitions.) and supports continued assurance through: The driver is replaced with no live job disruption and the node passes GPU enumeration and workload smoke tests before reopening scheduling.

Incorrect Answers

A:

This prevention control targets another operational risk: A new NVIDIA driver is installed on every host without checking its supported CUDA runtime and kernel module compatibility, leading to failed CUDA initialization. The currently reported mechanism remains: Active GPU processes can retain device handles and prevent safe driver module transitions.

B:

This prevention control targets another operational risk: GPU health tests fail because the driver package on a server was installed from an untrusted repository, and management cannot reproduce its package dependencies. The currently reported mechanism remains: Active GPU processes can retain device handles and prevent safe driver module transitions.

C:

This prevention control targets another operational risk: An operations team edits container runtime configuration by hand on some nodes, and CUDA containers work on one rack but fail after rescheduling to another rack. The currently reported mechanism remains: Active GPU processes can retain device handles and prevent safe driver module transitions.

Question 285

During NVIDIA AI factory acceptance, a technician observes: GPU health tests fail because the driver package on a server was installed from an untrusted repository, and management cannot reproduce its package dependencies. Which corrective deployment or operational action best addresses the stated problem?

  1. Drain the scheduler node, stop GPU workloads, and use the supported driver removal or update workflow followed by validation.
  2. Align host DOCA, BlueField software, and firmware to a vendor-supported compatibility matrix and upgrade through a controlled sequence.
  3. Reinstall the approved signed NVIDIA driver distribution through a controlled artifact repository and record package provenance.
  4. Deploy versioned golden images or controlled image automation and reconcile host drift before promoting updates.

Explanation

Correct Answer

C:

For the stated NVIDIA AI infrastructure condition (GPU health tests fail because the driver package on a server was installed from an untrusted repository, and management cannot reproduce its package dependencies.), this action addresses the concrete failure: Reinstall the approved signed NVIDIA driver distribution through a controlled artifact repository and record package provenance. The underlying mechanism is: Uncontrolled driver package sources create both supply-chain risk and configuration drift across cluster nodes. Verification would require: The package manifest identifies trusted origin, the driver loads cleanly, and a representative workload completes with recorded versions.

Incorrect Answers

A:

This option could be appropriate for a different NVIDIA infrastructure problem (3.4: Install, update, and remove NVIDIA GPU and DOCA drivers): An operator removes the NVIDIA driver while GPU containers are still running, leaving orphaned jobs and an inconsistent module state across the node. The present issue is more specifically caused by: Uncontrolled driver package sources create both supply-chain risk and configuration drift across cluster nodes.

B:

This option could be appropriate for a different NVIDIA infrastructure problem (3.4: Install, update, and remove NVIDIA GPU and DOCA drivers): A BlueField DPU application fails after the host updates DOCA packages, while the DPU firmware and embedded software versions remain from an earlier release. The present issue is more specifically caused by: Uncontrolled driver package sources create both supply-chain risk and configuration drift across cluster nodes.

D:

This option could be appropriate for a different NVIDIA infrastructure problem (3.2: Install operating systems): A fleet of GPU hosts uses manually customized operating system packages, making a failed driver upgrade impossible to reproduce or roll back consistently. The present issue is more specifically caused by: Uncontrolled driver package sources create both supply-chain risk and configuration drift across cluster nodes.

Question 286

During NVIDIA AI factory acceptance, a technician observes: GPU health tests fail because the driver package on a server was installed from an untrusted repository, and management cannot reproduce its package dependencies. Which measured result most directly proves that this specific problem is resolved?

  1. The signed module loads under the enforced boot policy and a CUDA smoke test completes without reducing platform integrity controls.
  2. The driver is replaced with no live job disruption and the node passes GPU enumeration and workload smoke tests before reopening scheduling.
  3. A denied test account cannot schedule into the restricted partition while an approved account receives its expected GPU allocation.
  4. The package manifest identifies trusted origin, the driver loads cleanly, and a representative workload completes with recorded versions.

Explanation

Correct Answer

D:

This is the measurable acceptance result for the described case: The package manifest identifies trusted origin, the driver loads cleanly, and a representative workload completes with recorded versions. It validates the corrective operation (Reinstall the approved signed NVIDIA driver distribution through a controlled artifact repository and record package provenance.) rather than a related but different system check.

Incorrect Answers

A:

This observation would help verify a different incident: A security patch changes the host kernel and Secure Boot settings, and the NVIDIA GPU module stops loading despite the device remaining visible on PCIe. It does not directly establish the required result for the current case: The package manifest identifies trusted origin, the driver loads cleanly, and a representative workload completes with recorded versions.

B:

This observation would help verify a different incident: An operator removes the NVIDIA driver while GPU containers are still running, leaving orphaned jobs and an inconsistent module state across the node. It does not directly establish the required result for the current case: The package manifest identifies trusted origin, the driver loads cleanly, and a representative workload completes with recorded versions.

C:

This observation would help verify a different incident: A new node is added to the wrong Slurm partition and gains access to restricted customer workloads despite being intended for untrusted experimentation. It does not directly establish the required result for the current case: The package manifest identifies trusted origin, the driver loads cleanly, and a representative workload completes with recorded versions.

Question 287

During NVIDIA AI factory acceptance, a technician observes: GPU health tests fail because the driver package on a server was installed from an untrusted repository, and management cannot reproduce its package dependencies. Which root cause or infrastructure principle best explains the observed failure?

  1. Active GPU processes can retain device handles and prevent safe driver module transitions.
  2. Host and DPU components form a coupled software stack; isolated upgrades can break offload services.
  3. Installing a registry client does not configure identity, organizational entitlement, or secure token handling.
  4. Uncontrolled driver package sources create both supply-chain risk and configuration drift across cluster nodes.

Explanation

Correct Answer

D:

This technical mechanism explains the reported condition: Uncontrolled driver package sources create both supply-chain risk and configuration drift across cluster nodes. The observed situation is: GPU health tests fail because the driver package on a server was installed from an untrusted repository, and management cannot reproduce its package dependencies. A requirement-aligned correction is: Reinstall the approved signed NVIDIA driver distribution through a controlled artifact repository and record package provenance.

Incorrect Answers

A:

This underlying cause is associated with another GPU platform incident: An operator removes the NVIDIA driver while GPU containers are still running, leaving orphaned jobs and an inconsistent module state across the node. The observed case instead concerns: Uncontrolled driver package sources create both supply-chain risk and configuration drift across cluster nodes.

B:

This underlying cause is associated with another GPU platform incident: A BlueField DPU application fails after the host updates DOCA packages, while the DPU firmware and embedded software versions remain from an earlier release. The observed case instead concerns: Uncontrolled driver package sources create both supply-chain risk and configuration drift across cluster nodes.

C:

This underlying cause is associated with another GPU platform incident: An NGC CLI client is installed on a shared administrative workstation but lacks authenticated registry configuration, so container downloads fail with permissions errors. The observed case instead concerns: Uncontrolled driver package sources create both supply-chain risk and configuration drift across cluster nodes.

Question 288

During NVIDIA AI factory acceptance, a technician observes: GPU health tests fail because the driver package on a server was installed from an untrusted repository, and management cannot reproduce its package dependencies. Which repeatable operational safeguard best prevents recurrence of this failure?

  1. Pin tested driver, CUDA, and kernel versions in host image change controls.
  2. Test NVIDIA kernel module signing and reload behavior under each supported secure host image update.
  3. Cross-check scheduler GRES inventory against NVIDIA SMI discovery after every node image or hardware change.
  4. Standardize trusted package distribution and audit installed GPU/DOCA driver hashes and versions.

Explanation

Correct Answer

D:

This preventive practice addresses the underlying failure (Uncontrolled driver package sources create both supply-chain risk and configuration drift across cluster nodes.) and supports continued assurance through: The package manifest identifies trusted origin, the driver loads cleanly, and a representative workload completes with recorded versions.

Incorrect Answers

A:

This prevention control targets another operational risk: A new NVIDIA driver is installed on every host without checking its supported CUDA runtime and kernel module compatibility, leading to failed CUDA initialization. The currently reported mechanism remains: Uncontrolled driver package sources create both supply-chain risk and configuration drift across cluster nodes.

B:

This prevention control targets another operational risk: A security patch changes the host kernel and Secure Boot settings, and the NVIDIA GPU module stops loading despite the device remaining visible on PCIe. The currently reported mechanism remains: Uncontrolled driver package sources create both supply-chain risk and configuration drift across cluster nodes.

C:

This prevention control targets another operational risk: An AI job runs on one compute node, but Slurm cannot distribute it because GPU resources are absent from the scheduler's generic resource definitions. The currently reported mechanism remains: Uncontrolled driver package sources create both supply-chain risk and configuration drift across cluster nodes.

Question 289

An infrastructure administrator receives the following incident: A Docker AI image launches on a GPU host but reports no CUDA devices because the NVIDIA container runtime integration was never installed. Which corrective deployment or operational action best addresses the stated problem?

  1. Configure the supported runtime and scheduler device allowlists so each container receives only its assigned GPU or MIG identifiers.
  2. Install and configure the NVIDIA Container Toolkit for the supported container runtime and test GPU device injection.
  3. Apply version-controlled toolkit configuration and reconcile Docker or other runtime integrations across all target hosts.
  4. Rehearse the version change with representative compute nodes and scheduling integrations and execute a staged upgrade with rollback.

Explanation

Correct Answer

B:

For the stated NVIDIA AI infrastructure condition (A Docker AI image launches on a GPU host but reports no CUDA devices because the NVIDIA container runtime integration was never installed.), this action addresses the concrete failure: Install and configure the NVIDIA Container Toolkit for the supported container runtime and test GPU device injection. The underlying mechanism is: An installed host driver does not automatically expose accelerators inside isolated containers. Verification would require: A small container runs the approved `nvidia-smi` or CUDA probe and reports the allocated device UUIDs correctly.

Incorrect Answers

A:

This option could be appropriate for a different NVIDIA infrastructure problem (3.5: Install the NVIDIA Container Toolkit): A container in a multi-tenant GPU cluster can see accelerators allocated to another job because the runtime launches with unrestricted device exposure. The present issue is more specifically caused by: An installed host driver does not automatically expose accelerators inside isolated containers.

C:

This option could be appropriate for a different NVIDIA infrastructure problem (3.5: Install the NVIDIA Container Toolkit): An operations team edits container runtime configuration by hand on some nodes, and CUDA containers work on one rack but fail after rescheduling to another rack. The present issue is more specifically caused by: An installed host driver does not automatically expose accelerators inside isolated containers.

D:

This option could be appropriate for a different NVIDIA infrastructure problem (3.1: Install Base Command Manager and configure and verify high availability): An operations team upgrades BCM directly in production without testing whether existing Slurm and provisioning integrations are compatible with the new management API. The present issue is more specifically caused by: An installed host driver does not automatically expose accelerators inside isolated containers.

Question 290

An infrastructure administrator receives the following incident: A Docker AI image launches on a GPU host but reports no CUDA devices because the NVIDIA container runtime integration was never installed. Which measured result most directly proves that this specific problem is resolved?

  1. A small container runs the approved `nvidia-smi` or CUDA probe and reports the allocated device UUIDs correctly.
  2. A negative tenant test cannot enumerate unauthorized accelerators while the permitted device runs the expected workload.
  3. The approved container resolves matching CUDA driver interfaces and completes a representative GPU task after the upgrade.
  4. A deliberately interrupted test job frees its GPU assignments and leaves the host ready for a new tenant after verified cleanup.

Explanation

Correct Answer

A:

This is the measurable acceptance result for the described case: A small container runs the approved `nvidia-smi` or CUDA probe and reports the allocated device UUIDs correctly. It validates the corrective operation (Install and configure the NVIDIA Container Toolkit for the supported container runtime and test GPU device injection.) rather than a related but different system check.

Incorrect Answers

B:

This observation would help verify a different incident: A container in a multi-tenant GPU cluster can see accelerators allocated to another job because the runtime launches with unrestricted device exposure. It does not directly establish the required result for the current case: A small container runs the approved `nvidia-smi` or CUDA probe and reports the allocated device UUIDs correctly.

C:

This observation would help verify a different incident: After a driver upgrade, the container toolkit continues referencing stale GPU library paths, and a container loads incompatible runtime libraries. It does not directly establish the required result for the current case: A small container runs the approved `nvidia-smi` or CUDA probe and reports the allocated device UUIDs correctly.

D:

This observation would help verify a different incident: Slurm reports some nodes as allocated indefinitely after a failed distributed job because job cleanup leaves Enroot container artifacts and stale GPU processes. It does not directly establish the required result for the current case: A small container runs the approved `nvidia-smi` or CUDA probe and reports the allocated device UUIDs correctly.

NCP-AI Infrastructure (NCP-AII) Practice Tests