Operating Systems Questions

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Computer Science

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Help me with answer for 14 questions.


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1. Explain why network operating systems were phased out when distributed operating systems gained popularity. 2. Explain the major advantages and disadvantages of a star topology. 3. This chapter described packet routing. Give the two examples in which packets can be routed and explain how they differ. 4. Give two real life examples where packet switching is preferred over circuit switching and explain why. 5. Briefly compare the advantages and disadvantages of an NOS and a DO/S, and explain which you would prefer to administer and why. 6. Deadlocks are discussed in Chapter 5. Describe how a DO/S Processor Manager could attempt to avoid them in a real-life network. Then describe how it could try to recover gracefully if one should occur. 7. Compare and contrast the advantages and disadvantages of the two varieties of distributed operating systems discussed in this chapter: a process-based DO/S and an object-based DO/S. If you were the system administrator, which would you prefer? Explain your reasoning. 8. Disgruntled employees can sometimes wreak havoc on a computer system because other users leave their passwords written in plain view in the space surrounding their workstations. How would you convince your users to safeguard their passwords? What specific advice would you give them? 9. Explain how you would verify the effectiveness of a new password security policy. Explain the critical elements of such a policy if it is to be successful. 10. Assuming that a file listing showed the following permissions: prwxr-xr-x . Answer the following questions. a. Is this a file or a directory? b. What permissions does the WORLD have? c. What permissions have been denied to the GROUP? 11. The role of the UNIX kernel is crucial. Explain why this is so and how it is treated differently from other parts of the operating system. 12. UNIX treats all devices as files. Explain why this was an innovative feature when it was first introduced and how it adds flexibility to this operating system. 13. Explain in your own words the importance of monitoring system performance. Discuss how you would gather the necessary information. Also, list which elements are most important, and in your own words, explain why. 14. The 64-bit version of Windows 7 can run all 32-bit applications with the help of an emulator, but it does not support 16-bit applications. Can you imagine a circumstance where someone might need support for a 16-bit application? Describe it.
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