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Andrew S. Tanenbaum (OS) Edition 4 Exercise 1 Question 9 (Page No. 81)
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There are several design goals in building an operating system, for example, resource utilization, timeliness, robustness, and so on. Give an example of two design goals that may contradict one another.
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Andrew S. Tanenbaum (OS) Edition 4 Exercise 1 Question 11 (Page No. 81)
A $255$-GB disk has $65,536$ cylinders with $255$ sectors per track and $512$ bytes per sector. How many platters and heads does this disk have? Assuming an average cylinder seek time of $11$ ms, average rotational delay ... reading rate of $100$ MB/sec, calculate the average time it will take to read $400$ KB from one sector.
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Andrew S. Tanenbaum (OS) Edition 4 Exercise 1 Question 10 (Page No. 81)
What is the difference between kernel and user mode? Explain how having two distinct modes aids in designing an operating system.
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Andrew S. Tanenbaum (OS) Edition 4 Exercise 1 Question 8 (Page No. 81)
One reason GUIs were initially slow to be adopted was the cost of the hardware needed to support them. How much video RAM is needed to support a $25-\text{line}\times\: 80-\text{row}$ character monochrome text screen? How much for a ... $ prices $(\$5/KB)?$ How much is it now?
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Andrew S. Tanenbaum (OS) Edition 4 Exercise 1 Question 7 (Page No. 81)
The family-of-computers idea was introduced in the $1960s$ with the IBM System$/360$ mainframes. Is this idea now dead as a doornail or does it live on?
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