Practice - Major Issues with Program I/O and Interrupt I/O
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Practice Questions
Test your understanding with targeted questions
What is DMA?
💡 Hint: Think about how devices communicate with CPU without direct intervention.
What does context switching refer to?
💡 Hint: It happens in interrupt-driven I/O when the CPU is interrupted.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is a primary advantage of using DMA over interrupt-driven I/O?
💡 Hint: Think about how each method utilizes CPU resources.
True or False: Cycle stealing mode allows the CPU to have full control of the bus during DMA transfers.
💡 Hint: Recall how bus access is shared during data transfer.
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Challenge Problems
Push your limits with advanced challenges
You need to design a computer system that uses DMA. What factors will you consider to optimize performance?
💡 Hint: Think about the workloads and what configurations would maximize throughput.
If a CPU can handle 8,000 I/O interrupts per second and a device needs to send 16 MB of data. Calculate how often the device would require the CPU's attention if using interrupt-driven I/O.
💡 Hint: Understand how to convert megabytes to bytes and then calculate interrupts. Divide the data by the size of each interrupt's handling capacity.
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