Linux is a general term for a class of free-to-use and self-propagating Unix-like computer operating systems. Which of the following does not belong to the advantages of Linux?

• A.The Linux system is an open-source system, which is relatively mature and has a complete set of permissions mechanisms with high security and stability.
• B.Linux system can install semi-rich free web server software, database, web development tools.
• C.Multiple users can own and use system resources individually, that is, each user has specific permissions to their own resources and does not affect each other.
• D.The graphical interface makes it relative to other systems. It's easy to use, greatly reducing the user's learning cost.

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Which of the following statements about the comparison of UDIMM, RDIMM and LRDIMM are correct? (Multiple choice)

• A.Compared with RDIMM and LRDIMM, the load and power consumption of the memory bus are reduced, and the maximum support capacity of the memory is provided.
• B.UDIMM unbuffered dual in-line memory module address and control signals directly reach the DRAM chip on the DIMM without buffering, so the price is cheap.
• C.RDIMM supports Bufferered mode and high-performance Registered mode, which is more stable than UDIMM and supports the highest capacity of server memory.
• D.UDIMM needs to ensure that the transmission distance between the CPU and each memory particle is equal, so that parallel transmission is effective, and this requires a higher manufacturing process, so UDIMMs are very low in capacity and frequency.

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Which of the following statement about the CISC instruction set is wrong?

• A.CISC microprocessor has a complex structure, powerful functions, and easy realization of special functions.
• B.Both the CISC instruction set and the RISC instruction set are von Neumann structures.
• C.The instruction system is huge, with many instruction formats and addressing modes
• D.About 20% of the instructions in the CISC command system account for 80% of the processing time

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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

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Which of the following statements about typical scenarios of offline analysis and data mining is wrong?

• A.Configure balanced SATA hard drives.
• B.This scenario is generally a warm data configuration, and data reliability generally adopts triple copy technology or 1.5 copy EC (erasure code) configuration.
• C.Configure mid-range CPU
• D.Configure large memory

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