NVIDIA NCP-AII Practice Test 22
Question 210
During an NVIDIA AI factory acceptance test, engineers discover: A replacement ConnectX card runs a different firmware and driver combination from adjacent cluster nodes. Which TWO complementary elements are needed: the correct technical action and the strongest independent diagnostic evidence? Select TWO answers.
- Check target versions before and after, update logs, activation requirements, node drain records and recovery options.
- Inspect lspci, device firmware and driver metadata, link state, RDMA devices and host topology configuration.
- Treat a lit transceiver LED as proof that the Linux RDMA stack and firmware are configured correctly.
- Calculate peak supported server and fabric load, apply facility margin and verify branch and PDU capacity under representative load.
- Inventory NIC hardware, PCIe binding, supported firmware and host drivers before validating network-service readiness.
Explanation
Correct Answers
B:This is the direct operational evidence to investigate: Inspect lspci, device firmware and driver metadata, link state, RDMA devices and host topology configuration. Observed scenario: A replacement ConnectX card runs a different firmware and driver combination from adjacent cluster nodes.
E:This is an appropriate correction for ConnectX NIC detection and firmware inventory: Inventory NIC hardware, PCIe binding, supported firmware and host drivers before validating network-service readiness. Observed scenario: A replacement ConnectX card runs a different firmware and driver combination from adjacent cluster nodes. The governing mechanism is: Physical network presence, driver initialization and transport offload availability are distinct layers of the deployment.
Incorrect Answers
A:This alternative is relevant to Firmware activation and reset sequencing but does not directly resolve the current ConnectX NIC detection and firmware inventory issue: Check target versions before and after, update logs, activation requirements, node drain records and recovery options. Observed scenario: A replacement ConnectX card runs a different firmware and driver combination from adjacent cluster nodes.
C:This tempting but unsafe shortcut is not a sufficient remediation for ConnectX NIC detection and firmware inventory: Treat a lit transceiver LED as proof that the Linux RDMA stack and firmware are configured correctly. A replacement ConnectX card runs a different firmware and driver combination from adjacent cluster nodes. Physical network presence, driver initialization and transport offload availability are distinct layers of the deployment.
D:This alternative is relevant to GPU node peak power budgeting but does not directly resolve the current ConnectX NIC detection and firmware inventory issue: Calculate peak supported server and fabric load, apply facility margin and verify branch and PDU capacity under representative load. Observed scenario: A replacement ConnectX card runs a different firmware and driver combination from adjacent cluster nodes.
Question 211
A production GPU cluster review identifies this condition: A replacement ConnectX card runs a different firmware and driver combination from adjacent cluster nodes. Which diagnostic evidence should be obtained FIRST to substantiate the likely fault or configuration gap? Select ONE best answer.
- Compare DGX/HGX platform identifiers, per-GPU and switch firmware, update logs and NVLink health results.
- Treat a lit transceiver LED as proof that the Linux RDMA stack and firmware are configured correctly.
- Inspect facility grounding tests, rack bonds, wrist-strap practice, ESD storage and chassis service records.
- Inspect lspci, device firmware and driver metadata, link state, RDMA devices and host topology configuration.
Explanation
Correct Answer
D:This is the direct operational evidence to investigate: Inspect lspci, device firmware and driver metadata, link state, RDMA devices and host topology configuration. Observed scenario: A replacement ConnectX card runs a different firmware and driver combination from adjacent cluster nodes. The governing mechanism is: Physical network presence, driver initialization and transport offload availability are distinct layers of the deployment.
Incorrect Answers
A:This alternative is relevant to HGX GPU tray and NVSwitch firmware coordination but does not directly resolve the current ConnectX NIC detection and firmware inventory issue: Compare DGX/HGX platform identifiers, per-GPU and switch firmware, update logs and NVLink health results. Observed scenario: A replacement ConnectX card runs a different firmware and driver combination from adjacent cluster nodes.
B:This tempting but unsafe shortcut is not a sufficient remediation for ConnectX NIC detection and firmware inventory: Treat a lit transceiver LED as proof that the Linux RDMA stack and firmware are configured correctly. Observed scenario: A replacement ConnectX card runs a different firmware and driver combination from adjacent cluster nodes. The governing mechanism is: Physical network presence, driver initialization and transport offload availability are distinct layers of the deployment. The proportionate action is: Inventory NIC hardware, PCIe binding, supported firmware and host drivers before validating network-service readiness.
C:This alternative is relevant to Rack bonding grounding and ESD handling but does not directly resolve the current ConnectX NIC detection and firmware inventory issue: Inspect facility grounding tests, rack bonds, wrist-strap practice, ESD storage and chassis service records. Observed scenario: A replacement ConnectX card runs a different firmware and driver combination from adjacent cluster nodes.
Question 212
In a professional AI infrastructure deployment, a technician observes: A replacement ConnectX card runs a different firmware and driver combination from adjacent cluster nodes. After corrective work, which observable result BEST confirms that the requirement is met? Select ONE best answer.
- Treat a lit transceiver LED as proof that the Linux RDMA stack and firmware are configured correctly.
- Every required ConnectX adapter enumerates with approved versions, expected ports and validated transport capability.
- Electrical inspection approves the rack and sensitive boards are installed without ESD or grounding exceptions.
- All accelerators enumerate with supported firmware and the internal fabric passes vendor-recommended connectivity checks.
Explanation
Correct Answer
B:This is an observable verified result, not merely a claimed configuration change: Every required ConnectX adapter enumerates with approved versions, expected ports and validated transport capability. Observed scenario: A replacement ConnectX card runs a different firmware and driver combination from adjacent cluster nodes.
Incorrect Answers
A:This tempting but unsafe shortcut is not a sufficient remediation for ConnectX NIC detection and firmware inventory: Treat a lit transceiver LED as proof that the Linux RDMA stack and firmware are configured correctly. Observed scenario: A replacement ConnectX card runs a different firmware and driver combination from adjacent cluster nodes. The governing mechanism is: Physical network presence, driver initialization and transport offload availability are distinct layers of the deployment. The proportionate action is: Inventory NIC hardware, PCIe binding, supported firmware and host drivers before validating network-service readiness. A direct check is: Inspect lspci, device firmware and driver metadata, link state, RDMA devices and host topology configuration. The acceptance condition is: Every required ConnectX adapter enumerates with approved versions, expected ports and validated transport capability.
C:This alternative is relevant to Rack bonding grounding and ESD handling but does not directly resolve the current ConnectX NIC detection and firmware inventory issue: Electrical inspection approves the rack and sensitive boards are installed without ESD or grounding exceptions. Observed scenario: A replacement ConnectX card runs a different firmware and driver combination from adjacent cluster nodes.
D:This alternative is relevant to HGX GPU tray and NVSwitch firmware coordination but does not directly resolve the current ConnectX NIC detection and firmware inventory issue: All accelerators enumerate with supported firmware and the internal fabric passes vendor-recommended connectivity checks. Observed scenario: A replacement ConnectX card runs a different firmware and driver combination from adjacent cluster nodes.
Question 213
The cluster operations team needs to evaluate this situation: An engineer assumes an interface with a link LED necessarily has full RDMA capability available to the OS. Which operational response is MOST appropriate to address the root issue? Select ONE best answer.
- Check rack dimensions, floor load and rail compatibility, then place approved chassis using the vendor's supported installation sequence.
- Inventory NIC hardware, PCIe binding, supported firmware and host drivers before validating network-service readiness.
- Trace each power supply to independent approved rack feeds and test safe loss of either feed within the supported power budget.
- Treat a lit transceiver LED as proof that the Linux RDMA stack and firmware are configured correctly.
Explanation
Correct Answer
B:This is an appropriate correction for ConnectX NIC detection and firmware inventory: Inventory NIC hardware, PCIe binding, supported firmware and host drivers before validating network-service readiness. Observed scenario: An engineer assumes an interface with a link LED necessarily has full RDMA capability available to the OS.
Incorrect Answers
A:This alternative is relevant to DGX rack load and rail placement but does not directly resolve the current ConnectX NIC detection and firmware inventory issue: Check rack dimensions, floor load and rail compatibility, then place approved chassis using the vendor's supported installation sequence. Observed scenario: An engineer assumes an interface with a link LED necessarily has full RDMA capability available to the OS.
C:That option concerns Dual-feed rack power and PDU mapping. Physical network presence, driver initialization and transport offload availability are distinct layers of the deployment.
D:This tempting but unsafe shortcut is not a sufficient remediation for ConnectX NIC detection and firmware inventory: Treat a lit transceiver LED as proof that the Linux RDMA stack and firmware are configured correctly. An engineer assumes an interface with a link LED necessarily has full RDMA capability available to the OS.
Question 214
At a multi-node AI infrastructure handoff, the team records: An engineer assumes an interface with a link LED necessarily has full RDMA capability available to the OS. Which underlying infrastructure principle BEST explains the issue? Select ONE best answer.
- Power redundancy depends on independent supply paths and properly sized capacity, not merely on the number of power cords.
- Physical network presence, driver initialization and transport offload availability are distinct layers of the deployment.
- Treat a lit transceiver LED as proof that the Linux RDMA stack and firmware are configured correctly.
- Redfish and IPMI expose hardware management data and operations, but endpoint selection and privileges determine their safety.
Explanation
Correct Answer
B:This is the governing infrastructure principle: Physical network presence, driver initialization and transport offload availability are distinct layers of the deployment. Observed scenario: An engineer assumes an interface with a link LED necessarily has full RDMA capability available to the OS.
Incorrect Answers
A:That option concerns Dual-feed rack power and PDU mapping. The proportionate action is: Inventory NIC hardware, PCIe binding, supported firmware and host drivers before validating network-service readiness.
C:This tempting but unsafe shortcut is not a sufficient remediation for ConnectX NIC detection and firmware inventory: Treat a lit transceiver LED as proof that the Linux RDMA stack and firmware are configured correctly. An engineer assumes an interface with a link LED necessarily has full RDMA capability available to the OS. Physical network presence, driver initialization and transport offload availability are distinct layers of the deployment.
D:This alternative is relevant to Redfish inventory and IPMI management boundaries but does not directly resolve the current ConnectX NIC detection and firmware inventory issue: Redfish and IPMI expose hardware management data and operations, but endpoint selection and privileges determine their safety. Observed scenario: An engineer assumes an interface with a link LED necessarily has full RDMA capability available to the OS.
Question 215
During an NVIDIA AI factory acceptance test, engineers discover: An engineer assumes an interface with a link LED necessarily has full RDMA capability available to the OS. Which diagnostic evidence should be obtained FIRST to substantiate the likely fault or configuration gap? Select ONE best answer.
- Treat a lit transceiver LED as proof that the Linux RDMA stack and firmware are configured correctly.
- Inspect lspci, device firmware and driver metadata, link state, RDMA devices and host topology configuration.
- Review inlet and exhaust sensor trends, aisle containment, rack occupancy, fan telemetry and thermal throttling events.
- Check target versions before and after, update logs, activation requirements, node drain records and recovery options.
Explanation
Correct Answer
B:This is the direct operational evidence to investigate: Inspect lspci, device firmware and driver metadata, link state, RDMA devices and host topology configuration. Observed scenario: An engineer assumes an interface with a link LED necessarily has full RDMA capability available to the OS.
Incorrect Answers
A:This tempting but unsafe shortcut is not a sufficient remediation for ConnectX NIC detection and firmware inventory: Treat a lit transceiver LED as proof that the Linux RDMA stack and firmware are configured correctly. Observed scenario: An engineer assumes an interface with a link LED necessarily has full RDMA capability available to the OS. The governing mechanism is: Physical network presence, driver initialization and transport offload availability are distinct layers of the deployment. The proportionate action is: Inventory NIC hardware, PCIe binding, supported firmware and host drivers before validating network-service readiness.
C:That option concerns Cold aisle inlet air and thermal envelope. Physical network presence, driver initialization and transport offload availability are distinct layers of the deployment.
D:This alternative is relevant to Firmware activation and reset sequencing but does not directly resolve the current ConnectX NIC detection and firmware inventory issue: Check target versions before and after, update logs, activation requirements, node drain records and recovery options. Observed scenario: An engineer assumes an interface with a link LED necessarily has full RDMA capability available to the OS.
Question 216
A production GPU cluster review identifies this condition: An engineer assumes an interface with a link LED necessarily has full RDMA capability available to the OS. After corrective work, which observable result BEST confirms that the requirement is met? Select ONE best answer.
- All target components match a recorded supported firmware combination and deviations are reviewed before go-live.
- Treat a lit transceiver LED as proof that the Linux RDMA stack and firmware are configured correctly.
- The active component revisions equal approved targets and nodes return to service after verified staged updates.
- Every required ConnectX adapter enumerates with approved versions, expected ports and validated transport capability.
Explanation
Correct Answer
D:This is an observable verified result, not merely a claimed configuration change: Every required ConnectX adapter enumerates with approved versions, expected ports and validated transport capability. Observed scenario: An engineer assumes an interface with a link LED necessarily has full RDMA capability available to the OS.
Incorrect Answers
A:This alternative is relevant to Platform firmware component inventory but does not directly resolve the current ConnectX NIC detection and firmware inventory issue: All target components match a recorded supported firmware combination and deviations are reviewed before go-live. Observed scenario: An engineer assumes an interface with a link LED necessarily has full RDMA capability available to the OS.
B:This tempting but unsafe shortcut is not a sufficient remediation for ConnectX NIC detection and firmware inventory: Treat a lit transceiver LED as proof that the Linux RDMA stack and firmware are configured correctly. Observed scenario: An engineer assumes an interface with a link LED necessarily has full RDMA capability available to the OS. The governing mechanism is: Physical network presence, driver initialization and transport offload availability are distinct layers of the deployment. The proportionate action is: Inventory NIC hardware, PCIe binding, supported firmware and host drivers before validating network-service readiness. A direct check is: Inspect lspci, device firmware and driver metadata, link state, RDMA devices and host topology configuration. The acceptance condition is: Every required ConnectX adapter enumerates with approved versions, expected ports and validated transport capability.
C:This alternative is relevant to Firmware activation and reset sequencing but does not directly resolve the current ConnectX NIC detection and firmware inventory issue: The active component revisions equal approved targets and nodes return to service after verified staged updates. Observed scenario: An engineer assumes an interface with a link LED necessarily has full RDMA capability available to the OS.
Question 217
In a professional AI infrastructure deployment, a technician observes: A new GPU pod connects all compute racks through one core uplink and cross-rack collectives congest immediately. Which operational response is MOST appropriate to address the root issue? Select ONE best answer.
- Use a scalable supported leaf-spine topology with adequate underlay links, routing and tested failure domains.
- Provision unique BMC addresses on protected out-of-band management, rotate initial credentials and test access separately from host networking.
- Check supported CDU supply, flow, leak detection and interlock behavior, then demonstrate controlled thermal response before production.
- Assume a single 400G uplink guarantees 400G simultaneous service to every GPU server behind the same leaf.
Explanation
Correct Answer
A:This is an appropriate correction for AI factory spine leaf underlay design: Use a scalable supported leaf-spine topology with adequate underlay links, routing and tested failure domains. Observed scenario: A new GPU pod connects all compute racks through one core uplink and cross-rack collectives congest immediately.
Incorrect Answers
B:This alternative is relevant to BMC network bring-up and out-of-band separation but does not directly resolve the current AI factory spine leaf underlay design issue: Provision unique BMC addresses on protected out-of-band management, rotate initial credentials and test access separately from host networking. Observed scenario: A new GPU pod connects all compute racks through one core uplink and cross-rack collectives congest immediately.
C:This alternative is relevant to Liquid cooling supply and leak interlocks but does not directly resolve the current AI factory spine leaf underlay design issue: Check supported CDU supply, flow, leak detection and interlock behavior, then demonstrate controlled thermal response before production. Observed scenario: A new GPU pod connects all compute racks through one core uplink and cross-rack collectives congest immediately.
D:This tempting but unsafe shortcut is not a sufficient remediation for AI factory spine leaf underlay design: Assume a single 400G uplink guarantees 400G simultaneous service to every GPU server behind the same leaf.
Question 218
The cluster operations team needs to evaluate this situation: A new GPU pod connects all compute racks through one core uplink and cross-rack collectives congest immediately. Which underlying infrastructure principle BEST explains the issue? Select ONE best answer.
- Heavy GPU systems require rated mechanical support and correct mounting; a rack-unit count alone does not establish safe physical deployment.
- GPU collectives generate heavy east-west traffic; a physically connected fabric may still be oversubscribed or fragile.
- Assume a single 400G uplink guarantees 400G simultaneous service to every GPU server behind the same leaf.
- AI compute power demand varies with accelerator utilization and can exceed idle or average measurements during parallel jobs.
Explanation
Correct Answer
B:This is the governing infrastructure principle: GPU collectives generate heavy east-west traffic; a physically connected fabric may still be oversubscribed or fragile. Observed scenario: A new GPU pod connects all compute racks through one core uplink and cross-rack collectives congest immediately.
Incorrect Answers
A:That option concerns DGX rack load and rail placement. A direct check is: Inspect topology diagrams, leaf-spine link maps, ECMP next hops, utilization and a planned spine-failure test.
C:This tempting but unsafe shortcut is not a sufficient remediation for AI factory spine leaf underlay design: Assume a single 400G uplink guarantees 400G simultaneous service to every GPU server behind the same leaf. GPU collectives generate heavy east-west traffic; a physically connected fabric may still be oversubscribed or fragile.
D:This alternative is relevant to GPU node peak power budgeting but does not directly resolve the current AI factory spine leaf underlay design issue: AI compute power demand varies with accelerator utilization and can exceed idle or average measurements during parallel jobs. Observed scenario: A new GPU pod connects all compute racks through one core uplink and cross-rack collectives congest immediately.
Question 219
At a multi-node AI infrastructure handoff, the team records: A new GPU pod connects all compute racks through one core uplink and cross-rack collectives congest immediately. Which diagnostic evidence should be obtained FIRST to substantiate the likely fault or configuration gap? Select ONE best answer.
- Inspect PDU outlet maps, breaker assignments, dual-cord wiring, load readings and approved failover test logs.
- Assume a single 400G uplink guarantees 400G simultaneous service to every GPU server behind the same leaf.
- Inspect facility grounding tests, rack bonds, wrist-strap practice, ESD storage and chassis service records.
- Inspect topology diagrams, leaf-spine link maps, ECMP next hops, utilization and a planned spine-failure test.
Explanation
Correct Answer
D:This is the direct operational evidence to investigate: Inspect topology diagrams, leaf-spine link maps, ECMP next hops, utilization and a planned spine-failure test. Observed scenario: A new GPU pod connects all compute racks through one core uplink and cross-rack collectives congest immediately.
Incorrect Answers
A:This alternative is relevant to Dual-feed rack power and PDU mapping but does not directly resolve the current AI factory spine leaf underlay design issue: Inspect PDU outlet maps, breaker assignments, dual-cord wiring, load readings and approved failover test logs. Observed scenario: A new GPU pod connects all compute racks through one core uplink and cross-rack collectives congest immediately.
B:This tempting but unsafe shortcut is not a sufficient remediation for AI factory spine leaf underlay design: Assume a single 400G uplink guarantees 400G simultaneous service to every GPU server behind the same leaf. A new GPU pod connects all compute racks through one core uplink and cross-rack collectives congest immediately.
C:This alternative is relevant to Rack bonding grounding and ESD handling but does not directly resolve the current AI factory spine leaf underlay design issue: Inspect facility grounding tests, rack bonds, wrist-strap practice, ESD storage and chassis service records. Observed scenario: A new GPU pod connects all compute racks through one core uplink and cross-rack collectives congest immediately.
Question 220
During an NVIDIA AI factory acceptance test, engineers discover: A new GPU pod connects all compute racks through one core uplink and cross-rack collectives congest immediately. Which TWO complementary elements are needed: the correct technical action and the strongest independent diagnostic evidence? Select TWO answers.
- Assume a single 400G uplink guarantees 400G simultaneous service to every GPU server behind the same leaf.
- Inspect topology diagrams, leaf-spine link maps, ECMP next hops, utilization and a planned spine-failure test.
- Inspect management API target paths, access scopes, sensor values, chassis actions and independent host inventory.
- Use a scalable supported leaf-spine topology with adequate underlay links, routing and tested failure domains.
- Validate platform TPM provisioning, UEFI secure-boot policy and measured-boot evidence against the approved baseline.
Explanation
Correct Answers
B:This is the direct operational evidence to investigate: Inspect topology diagrams, leaf-spine link maps, ECMP next hops, utilization and a planned spine-failure test. Observed scenario: A new GPU pod connects all compute racks through one core uplink and cross-rack collectives congest immediately. The governing mechanism is: GPU collectives generate heavy east-west traffic; a physically connected fabric may still be oversubscribed or fragile.
D:This is an appropriate correction for AI factory spine leaf underlay design: Use a scalable supported leaf-spine topology with adequate underlay links, routing and tested failure domains. Observed scenario: A new GPU pod connects all compute racks through one core uplink and cross-rack collectives congest immediately. The governing mechanism is: GPU collectives generate heavy east-west traffic; a physically connected fabric may still be oversubscribed or fragile.
Incorrect Answers
A:This tempting but unsafe shortcut is not a sufficient remediation for AI factory spine leaf underlay design: Assume a single 400G uplink guarantees 400G simultaneous service to every GPU server behind the same leaf. A new GPU pod connects all compute racks through one core uplink and cross-rack collectives congest immediately. GPU collectives generate heavy east-west traffic; a physically connected fabric may still be oversubscribed or fragile.
C:This alternative is relevant to Redfish inventory and IPMI management boundaries but does not directly resolve the current AI factory spine leaf underlay design issue: Inspect management API target paths, access scopes, sensor values, chassis actions and independent host inventory. Observed scenario: A new GPU pod connects all compute racks through one core uplink and cross-rack collectives congest immediately.
E:This alternative is relevant to TPM state and measured secure boot but does not directly resolve the current AI factory spine leaf underlay design issue: Validate platform TPM provisioning, UEFI secure-boot policy and measured-boot evidence against the approved baseline. Observed scenario: A new GPU pod connects all compute racks through one core uplink and cross-rack collectives congest immediately.