Reference no: EM13809820

Write a 200- to 300-word short-answer response to the following:

• How would you rank the principles of concurrency? Explain the design issues for which the concept of concurrency is rele

• Write a 200- to 300-word short-answer response to the following:

  • Consider the past couple days you have worked on the computer. What disk scheduling policies and algorithms were used? Explain

  • Write a 200- to 300-word short-answer response to the following

  DMA has been around for a long time and when it was invented it was really needed. Is it needed as much now with faster processors and also dual processors?

  • Write a 200- to 300-word short-answer response to the following

  The idea behind it is to free up the CPU so it can do other things giving it priority.  Devices such as sound cards have their own DMA. DMA is a technique to speed up data transfer without using the CPU. DMA is executed by a DMA controller that does not capture data but only drives the bus. Can you discuss the DMA controller in more detail?

  • For this assignment, you will choose one of the following options:

    • Option 1, File Access: Write a 2-page paper that discusses the following: Consider a system that supports 5,000 users. Suppose you want to allow 4,990 of those users to be able to access one file. How would you specify this protection scheme in UNIX^®?
    • Option 2, Protection Scheme: Write a 2-page paper that discusses the following: Consider a system that supports 5,000 users. Suppose that you want to allow 4,990 of those users to be able to access one file. Suggest another protection scheme that can be used more effectively for this purpose than the scheme provided by UNIX?