Free Dell EMC NCP-IB Exam Questions

Question 1

You are tasked with setting up an HPC cluster using MPI over InfiniBand. As part of the setup, you need to ensure optimal data transfer performance between nodes. Which of the following is the most critical MPI feature for optimizing communication over InfiniBand in this context?

A : TCP/IP Communication

B : Blocking Send/Receive Operations

C : RDMA (Remote Direct Memory Access) Support

D : Shared Memory Communication (SHM)

Answer: C

Question 2

You are tasked with setting up an HPC cluster using MPI over InfiniBand. As part of the setup, you need to ensure optimal data transfer performance between nodes. Which of the following is the most critical MPI feature for optimizing communication over InfiniBand in this context?

A : TCP/IP Communication

B : Blocking Send/Receive Operations

C : RDMA (Remote Direct Memory Access) Support

D : Shared Memory Communication (SHM)

Answer: C

Question 3

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 4

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 5

You are tasked with setting up an HPC cluster using MPI over InfiniBand. As part of the setup, you need to ensure optimal data transfer performance between nodes. Which of the following is the most critical MPI feature for optimizing communication over InfiniBand in this context?

A : TCP/IP Communication

B : Blocking Send/Receive Operations

C : RDMA (Remote Direct Memory Access) Support

D : Shared Memory Communication (SHM)

Answer: C