NVIDIA NCP-AIN 問題集

質問 1：
You are troubleshooting InfiniBand connectivity issues in a cluster managed by the NVIDIA Network Operator. You need to verify the status of the InfiniBand interfaces. Which command should you use to check the state and link layer of InfiniBand interfaces on a node?
A. ifconfig ib0
B. ip link show dev ib0
C. rdma show devices
D. ibstat -d mlx5_X
正解：D
解説: (Topexam メンバーにのみ表示されます)

質問 2：
What is the purpose of WJH (What Just Happened)?
A. Collate operating system logs and diagnose system crashes.
B. Provide contextual information regarding dropped packets in order to aid debugging.
C. Send notifications of failed login attempts to a pre-defined Slack channel.
D. Identify potential cyberattacks or unusual traffic patterns across the cluster.
正解：B
解説: (Topexam メンバーにのみ表示されます)

質問 3：
Which of the following options correctly describes the difference between UFM Telemetry, UFM Enterprise, and UFM Cyber AI?
A. UFM Telemetry detects and mitigates network security threats. UFM Enterprise provides real-time monitoring and analysis of network performance, and UFM Cyber AI focuses on network management and optimization.
B. UFM Telemetry focuses on network management and optimization, UFM Enterprise detects and mitigates network security threats, and UFM Cyber AI provides real-time monitoring and analysis of network performance.
C. UFM Telemetry provides real-time monitoring and analysis of network performance, UFM Enterprise focuses on network management and optimization, and UFM Cyber AI detects and mitigates network security threats.
D. UFM Telemetry provides real-time monitoring and analysis of network performance. UFM Enterprise detects and mitigates network security threats, and UFM Cyber AI focuses on network management and optimization.
正解：C
解説: (Topexam メンバーにのみ表示されます)

質問 4：
Which of the following NCCL environment variables enable SHARP aggregation with NCCL when using the NCCL-SHARP plugin?
Pick the 2 correct responses below
A. NCCL_COLLNET_ENABLE=1
B. NCCL_SHARP_AUTOINIT
C. NCCL_ALGO=CollNet
D. NCCLSPECTRUM_ENABLE=1
正解：A,B
解説: (Topexam メンバーにのみ表示されます)

質問 5：
You are optimizing a multi-node AI training cluster using InfiniBand networking and NVIDIA GPUs. You need to implement efficient collective communication operations across the nodes.
Which feature of NVIDIA Collective Communications Library (NCCL) allows for optimized performance in multi-subnet InfiniBand environments?
A. Static plugin linking
B. GPU Direct RDMA
C. Support for IB Router
D. Lazy connection establishment
正解：C
解説: (Topexam メンバーにのみ表示されます)

質問 6：
A leading AI research center is upgrading its infrastructure to support large language model projects.
The team is debating whether to implement a dedicated storage fabric for their AI workloads.
Which of the following best explains why a dedicated storage fabric is crucial for this AI network architecture?
Pick the 2 correct responses below
A. To enable parallel data access and improve storage performance for distributed AI workloads.
B. To provide high-bandwidth, low-latency data access that prevents I/O bottlenecks during AI model training.
C. To ensure data security and isolation from other network traffic.
D. To reduce the overall cost of the storage infrastructure.
正解：A,B
解説: (Topexam メンバーにのみ表示されます)

質問 7：
You are optimizing an AI workload that involves multiple GPUs across different nodes in a data center. The application requires both high-bandwidth GPU-to-GPU communication within nodes and efficient communication between nodes.
Which combination of NVIDIA technologies would best support this multi-node, multi-GPU AI workload?
A. NVLink for intra-node GPU communication and InfiniBand for inter-node communication.
B. NVLink for both intra-node and inter-node GPU communication.
C. PCIe for intra-node GPU communication and RoCE for inter-node communication.
D. InfiniBand for both intra-node and inter-node GPU communication.
正解：A
解説: (Topexam メンバーにのみ表示されます)