Early hard disk interfaces include IDE, SCSI, etc. With the development of hard disk technology, these interface types have disappeared. The current mainstream hard disk interfaces include SATA, SAS, PCIE, etc. Which of the following statements about SAS and SATA is correct?

• A. At the physical layer, the SAS interface and the SATA interface are compatible with each other. SATA hard disks can be used directly in the SAS environment, and SAS hard disks can also be used directly in the SATA environment.
• B. SAS is a new generation of SCSI technology, using parallel technology to obtain higher transmission speed, and improving internal space utilization by shortening the connection line, etc.
• C. SAS can meet high-performance, high-reliability applications, while SATA can meet large-capacity, non-critical business applications.
• D. At present, most of the mobile hard drives in the household category are SAS interfaces, while SATA interfaces are enterprise-level applications.

An Internet company purchased a batch of TaiShan servers to install its self-developed software, and used the server's SSL acceleration function.
Which of the following interfaces can be used for self-developed software development?

• A. Custom API
• B. OpenSSL API
• C. EVPAPI
• D. OpenSSL Engine API

The basic principle of FPGA is to integrate a large number of basic gate
circuits and registers of digital circuits in the chip. It isa
semi-custom circuit in the field ofapplication-specific integrated
circuits (ASIC).FPGAhas high performance and energy
efficiencycompared withASIC. Advantage of higher ratio.

• A. True
• B. False

An application consumes a lot of IO resources. In order to improve the read and write performance of the application, what adjustments should be made to the system parameters?

• A. vm.dirty_ background radio=5
• B. vm.dirty_background radio=20
• C. vm.swapiness=0
• D. vm.swampiness=100