Guide-linked quiz · Hard Level
InfiniBand and RDMA Networking Quiz
Test RDMA data paths, registered buffers, queue pairs, NDR rate scope, RoCE, flow control, and CPU setup versus bulk transfer.
Question 1 of 8
What does an RDMA-capable bulk data path aim to reduce?
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Answers and explanations appear as you take the quiz.
- What does an RDMA-capable bulk data path aim to reduce?
- Every CPU operation including setup
- The need to register or protect memory
- All application failure modes
- Repeated CPU copying and kernel-path work during buffer transfers
- How can an RDMA-capable InfiniBand data path reduce bulk-transfer overhead?
- By compressing every application buffer
- By offloading transfers and reducing repeated host copying and kernel processing
- By removing the need for memory permissions
- By guaranteeing lower latency for every application
- Roughly what per-link bandwidth does NDR InfiniBand provide?
- 40 Gb/s
- 100 Gb/s
- 400 Gb/s
- 10 Gb/s
- In RDMA, what are 'queue pairs' used for?
- Holding send and receive work requests that the network adapter processes
- Storing two backup copies of every file
- Pairing two GPUs into one logical device
- Encrypting and decrypting packets in sequence
- What is RoCE?
- A new programming language for GPUs
- RDMA over Converged Ethernet, bringing RDMA benefits to Ethernet
- A storage compression format
- A type of optical cable connector
- How does InfiniBand make its fabric effectively lossless?
- By dropping any packet that is too large
- By sending every packet three times
- By disabling all error checking
- By using credit-based link-layer flow control to prevent buffer overflow
- Why must an RDMA application manage registered buffer lifetime?
- The adapter needs valid authorized memory while the transfer runs
- Registration proves the data are correct
- Buffers never need completion checks
- Registration replaces all queue pairs
- Does RDMA mean a CPU never participates in networking?
- Yes; CPUs are removed from the servers
- Yes; every control operation is a GPU kernel
- No; software and CPU work remain for setup and management
- No; RDMA requires every byte to be copied repeatedly by the CPU
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