Which statement best describes NVMe in relation to SATA?

• A. NVMe uses AHCI over SATA to improve latency.
• B. NVMe uses a magnetic tape interface.
• C. NVMe is a high-performance protocol over PCIe with many async queues.
• D. NVMe is a file system.

Answer: (C)

NVMe is a high-performance protocol over PCIe that uses many asynchronous queues to handle I/O in parallel. This design lets a solid-state drive process thousands of outstanding I/O requests across multiple CPU cores with very low overhead, delivering far higher IOPS and lower latency than SATA with AHCI. SATA/AHCI was built for spinning disks and typically relies on a single command queue with limited depth, which creates bottlenecks for random, concurrent I/O. NVMe, by contrast, provides thousands of submission and completion queues and substantial per-queue depth, enabling true parallelism between the host and the storage device. It is not a file system and it is not a tape interface; it is the protocol that governs fast communication with SSDs over PCIe.