BMC is an independent system consisting of a processor, a small system, and management software. Can work independently. Servers need BMC, and PC computers do not have BMC.

• A.True
• B.False

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Which of the following is the correct understanding of the principle of high-availability clusters? (Multiple choice)

• A.The high availability of a computing system is measured by the reliability and maintainability of the system.
• B.In a master-slave high-availability cluster, the standby server detects the operating status of the primary server through the heartbeat line. If it cannot detect the "heartbeat" of the primary server, it automatically takes over the resources of the primary server.
• C.High-availability cluster refers to the use of the fault tolerance of the cluster system to provide 7X24 uninterrupted services to the outside world, aiming to provide highly reliable services.
• D.High-availability clusters have two working modes, master-master working mode and master-slave working mode.

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Memory is one of the important components in the computer. Which of the following statements about the definition of memory is wrong?

• A.When the calculation is running, the CPU will drop the data that needs to be calculated into the memory for calculation. When the calculation is completed, the CPU will transmit the result. The operation of the memory also determines the stable operation of the computer.
• B.The memory is relative to the external memory, and its main feature is the fast access rate
• C.Memory is also called internal memory. Its function is to back up, copy and permanently store the computing data in the CPU to improve the reliability of the data.
• D.Memory, also known as main memory, is the storage space where the CPU can directly die. It is made of semiconductor devices.

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Which of the following descriptions of the Apache+Tomcat cluster model is wrong?

• A.The advantage of the Apache R-proxy method is that it can be set to realize that apache is responsible for processing static web pages, and Tomcat is responsible for processing dynamic requests such as jsp and server.
• B.The Apache R-proxy method means that when one of the Tomcats stops running, Apache will forward the request, resulting in a 502-gateway error, but this problem does not exist as long as the server is restarted.
• C.The disadvantage of Apache R-proxy is that when the stopped Tomcat server is restarted, Apache cannot detect it and will not forward the request.
• D.In Apache modk mode, Apache will automatically detect the stopped Tomcat server, and then no longer send requests in the past.

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Heterogeneous computing is a new computing model following single-core computing and multi-core parallel computing. Which of the following description of the background of heterogeneous computing is wrong?

• A.NUMA is a mode of heterogeneous computing.
• B.The performance improvement brought by multi-core parallelism is limited. With the increase of parallelism, the problems of heat dissipation and energy consumption have become increasingly prominent.
• C.Moore's Law is getting closer and closer to the physical limit, and the difficulty and cost of improving single-core performance are getting higher and higher.
• D.Heterogeneous computing maximizes the performance of each processor and submits the most suitable task to the best computing unit.

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