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Questions and Answers
What is a single processor system?
A system that has one main CPU capable of executing a general-purpose instruction set.
In a single processor system, special purpose processors convert it into a multiprocessor system.
False
What is an example of a task managed by a disk controller microprocessor?
Implementing its own disk queue and scheduling algorithm.
Which of the following is NOT an advantage of multiprocessor systems?
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What is a characteristic of multiprocessor systems?
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Match the following advantages of multiprocessor systems:
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Study Notes
Single Processor Systems
- Comprise one main CPU capable of executing a general-purpose instruction set, including user process instructions.
- May include special purpose processors for specific tasks, like I/O processors in mainframes, which have a limited instruction set and do not run user processes.
- Managed by the operating system, which sends task information and monitors execution status of special purpose processors.
- Example: A disk controller microprocessor handles requests from the main CPU and implements its own scheduling algorithm, alleviating the CPU from disk scheduling responsibilities.
- Example: PCs utilize a keyboard microprocessor to convert keystrokes into codes sent to the CPU.
- Special purpose processors do not alter a single processor system into a multiprocessor system.
Multiprocessor Systems
- Feature more than one processor that operates in close communication, also known as tightly coupled or parallel systems.
- Share critical resources such as the computer bus, clock, memory, and peripheral devices.
- Capability for multiple processes to run simultaneously in parallel.
- Advantages include:
- Increased Throughput: More processors lead to higher work output in less time, though the speed-up ratio is less than linear based on the number of processors.
- Economy of Scale: Shared peripherals, mass storage, and power supplies lead to cost savings compared to running multiple single processor systems; data can be centralized on one disk for accessibility by all processors.
- Increased Reliability: Properly distributed programs across processors ensure that the system continues functioning even if one processor fails, merely resulting in reduced performance rather than a complete halt.
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Description
Explore the differences between single processor and multiprocessor systems. This quiz covers key concepts like CPU functionalities, operating systems' roles, and examples of special purpose processors. Test your understanding of how these systems manage processes and resources efficiently.
