Free Dell EMC NCP-IB Exam Questions

Become Dell EMC Certified with updated NCP-IB exam questions and correct answers

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Total 240 Questions | Updated On: Mar 27, 2025

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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

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 3

Which of the following correctly describes the role of the HCA in InfiniBand’s connection-oriented (reliable) transport mechanism?

A : HCAs handle flow control and congestion management at the application layer, ensuring no data is lost in transmission.

B : HCAs perform hardware-based packet retransmission at the switch level to ensure reliability in connection-oriented transfers.

C : HCAs are responsible for managing reliable connections through queue pairs (QPs), which enable reliable data transfer between nodes.

D : HCAs manage connection setup and teardown for RDMA, ensuring that each connection is uniquely identified by a Local Identifier (LID).

Answer: C

Question 4

In AI/ML training clusters, how does Remote Direct Memory Access (RDMA) over InfiniBand accelerate the performance of distributed deep learning?

A : RDMA over InfiniBand enables deep learning models to share memory across GPUs, allowing for larger models to be trained without memory bottlenecks.

B : RDMA over InfiniBand simplifies the orchestration of distributed training jobs by automating workload balancing across GPUs and nodes.

C : RDMA over InfiniBand automatically compresses the data being transferred, which reduces the bandwidth required for communication between GPUs.

D : RDMA over InfiniBand allows direct data transfer between GPUs without passing through the host CPU, significantly reducing the overhead during parameter updates.

Answer: D

Question 5

You are configuring the HCAs in your InfiniBand environment to maximize performance for a high-throughput, low-latency application. Which tuning parameter should you adjust on the HCA to reduce latency without causing packet loss?

A : Increase the MTU (Maximum Transmission Unit) to its highest supported value.

B : Decrease the MTU (Maximum Transmission Unit) to minimize the time it takes for small packets to be transmitted.

C : Adjust the Receive Queue Depth (RQD) to increase the ability to handle incoming traffic bursts.

D : Tune the SL (Service Level) to prioritize the application traffic over other traffic.

Answer: C

Page: 1 / 48

Total 240 Questions | Updated On: Mar 27, 2025

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