In some system tuning scenarios, kernel parameters need to be changed to adjust Linux kernel functions. The proc file system provides an interface to access the kernel. Which of the following methods can modify the contents of the proc file system? (Multiple choice)

• A.Use the sysctl command to configure the parameters in the /proc/sys directory
• B.Modify the /etc/sysctl.conf file
• C.Modify through a text editor
• D.Use echo command line output to redirect to the selected file under /proc

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Which of the following does not belong to server virtualization software?

• A.VMware ESXI
• B.FusionComputer
• C.XenServer
• D.FusionAccess

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The frequency of the CPU includes main frequency, external frequency, bus frequency and multiplier. Which of the following statements about multiplier is incorrect?

• A.Normally, when PC is overclocking, the multiplier is adjusted to unlock the CPU. The overclocking method of adjusting the multiplier is more determined than adjusting the external frequency.
• B.The multiplication factor refers to the relative proportional relationship between the CPU's main frequency and the external frequency.
• C.Under the same FSB, the higher the multiplier, the higher the CPU frequency, without limitation
• D.The data transmission speed between the CPU and the system is limited, and a CPU that blindly pursues the main frequency and obtains a high multiplier will have an obvious bottleneck effect.

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Huawei's latest generation of smart SSD control chip. Which of the following features include? (Multiple choice)

• A.16nm process technology
• B.Fusion of PCIe NVMe and SAS
• C.Support PCIe hot plug and smart acceleration
• D.Super wear algorithm, life extension 20%

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Which of the following descriptions about the bus is wrong?

• A.The bus is a public communication backbone for the transmission of information between various functional components of the computer.
• B.A single bus can transmit multiple bits at the same time.
• C.The bus is a transmission harness composed of wires.
• D.The bandwidth of the bus (that is, the total number of data that can be transmitted per unit time) is the bus bandwidth = frequency X bandwidth (Bytes/sec)

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