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A computer has a cache, main memory, and a disk. If a referenced word is in the cache, 20 ns are required to access it. If it is in main memory but not in the cache (called cache miss), 60 ns are needed to load it into the cache (this includes the time to originally check the cache), and then reference is started again. If the word is not in main memory, 12 ms are required to fetch the word from disk, followed by 60 ns to copy it to the cache, and then the reference is started again. The cache hit ratio is 0.9 and the main memory hit ratio is 0.6. What is the average time in nanoseconds required to access a referenced word on this system?
Choose Oracle datatypes for the following attributes from a normalized relation including:
Write two challenges an OS faces when passing parameters between user and kernel mode. Describe how an OS can overcome them
Name two benefits of Stateful Inspection Packet Filtering Routers. Name two benefits that firewalls add to a network
Describe the idea and process of Data Binding. Include an example of statements that would be used to create a Binding object. Describe components and effects of your model statement.
company wants to upgrade the computers they have by adding another internal hard drive and preparing it for use. How do you explain how to do this and the options that the company has?
Describe how you would use a negative feedback loop to manage your bank balance.Describe how you would do so with a positive feedback loop. Explain which you would prefer and why?
Andersen & Sons is a huge marketing company with four offices in the Chicago area. Each office has Windows Server 2003, and all servers are in a single domain.
Describe three solutions to critical section problem Explain the different methods used to handle deadlocks Distinguish between "No preemption" and "circular wait" in deadlocks prevention
Bench Fitness Centers has 8- i ndividual locations in this area. Most of the centers have the similar equipment and provide the same services,
Write a program that will accept the names of 3 processes as command-line arguments. Each of these processes will run for as many seconds as: (PID%10)*2+3 and terminate.�
IT administrators in small corporations must often execute various functions at same time like network administrator, database administrator, user consultant and others.
Consider the followimg nested loop contruct. Categorize the efficiency in terms of the variable n using "big-O" notation. Suppose the statements represented by the elipsis
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