Free NVIDIA NCP-IB Exam Questions

Question 1

You are configuring an InfiniBand-based high-performance computing (HPC) cluster for a scientific simulation workload that requires low latency and high throughput communication between nodes. The application is designed to leverage RDMA (Remote Direct Memory Access) to bypass the CPU and improve data transfer efficiency. You notice that while the latency is low, the throughput is not meeting expected levels. Which of the following is the most effective method to optimize RDMA performance for this application?

A : Enable CPU coalescing to allow RDMA to use more CPU resources

B : Ensure proper alignment of memory buffers to cache lines.

C : Increase MTU size on InfiniBand network interfaces

D : Disable flow control mechanisms for RDMA transfers

Answer: B

Question 2

Which of the following best describes how load balancing is achieved in an InfiniBand fabric using switches?

A : Load balancing is achieved by dynamically reassigning Local Identifiers (LIDs) to redistribute traffic across available ports.

B : Switches in an InfiniBand fabric use static routes for each connection, making load balancing impossible without manual reconfiguration.

C : InfiniBand switches use Adaptive Routing to dynamically select alternative paths based on real-time congestion information.

D : Load balancing is managed by the Host Channel Adapters (HCAs), and switches play no role in traffic distribution.

Answer: C

Question 3

Which two of the following statements correctly describe InfiniBand’s subnet management and addressing standards as per the InfiniBand architecture? (Select two)

A : InfiniBand requires static IP addressing for managing device communication.

B : The InfiniBand Subnet Manager (SM) is responsible for configuring Local Identifiers (LIDs) and ensuring route calculation within a subnet.

C : InfiniBand devices use Ethernet MAC addresses to identify themselves within the InfiniBand fabric.

D : InfiniBand uses DNS services for name resolution within the network.

E : Global Identifiers (GIDs) are used in InfiniBand for routing between different subnets.

Answer: B,E

Question 4

You notice performance degradation in your InfiniBand fabric, particularly when multiple large datasets are being transferred simultaneously. You run diagnostic tools but do not detect obvious hardware failures. Which diagnostic technique would most likely reveal the source of this issue?

A : Inspecting Congestion Control Mechanisms

B : Checking Port Error Counters for CRC Errors

C : Testing QP (Queue Pair) Depth

D : Verifying Link Initialization

Answer: A

Question 5