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CISA® Certified Information Systems Auditor®: Study Guide, Third Edition by David Cannon

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Exam Essentials

Understand the basics of computer architecture. Computer architecture comprises a central processor unit with high-speed cache memory and solid-state random access memory (RAM). All the computer’s components communicate by using a shared data bus, constructed of electrical wires. Interfaces connect the data bus to the electronic components such as the video display or the hard disk drive. There are different classes of computers based on size and capability, including the personal computer, midrange computer (mini), mainframe, and supercomputer.

Remember that computers may use single CPUs or multiple CPUs. In either case, the system can be running in time-sharing mode to support multiple users (multiuser mode). With multiple ...

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