CompTIA Linux+ XK0-006 (V8) Practice Question

The correct answer is AArch64. The AArch64 (also known as ARM64) architecture is based on Reduced Instruction Set Computer (RISC) principles, which results in processors that are highly power-efficient. This makes them ideal for large-scale, high-density data center deployments where minimizing power consumption and heat output is a critical factor for reducing the total cost of ownership (TCO). Major cloud providers utilize AArch64-based servers, like AWS Graviton, for these exact benefits.

• x86_64 is a Complex Instruction Set Computer (CISC) architecture and is the dominant architecture in servers today. While very powerful, it is generally less power-efficient than AArch64, making it less suitable when low power consumption is the top priority.
• x86 is a legacy 32-bit architecture. It would not be chosen for a new deployment of modern, 64-bit cloud-native workloads due to its addressing limitations and older technology.
• RISC-V is another RISC-based architecture, but its primary distinction is being an open, royalty-free standard. While it can be power-efficient, AArch64 is currently more established and prevalent in the high-performance, low-power server market.