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We observe the closed system for 30 minutes, during which 1600 tasks are completed, from 12 terminals. Each terminal (source of tasks) has think time of 12s between receiving response to one task, and submitting next task. System has CPU and two disks, one is fast, other is slow. Fast disk can deliver block in 1/2 of time that slow disk would take. During observation period, 32000 accesses happen at fast disk, and 12000 accesses at slow disk. During observation period, CPU is busy for 1080s, fast disk is busy for 400s, and slow disk is busy for 600s.
a) Explain the response time for jobs in observed system?b) As function of N, number of terminals, give high-load bounds for throughput and response time; also provide low-load bounds.c) How many terminals can we support, while keeping response time below 3 s?d) Assume we plan to replace CPU with CPU whose speed is double (therefore time to execute each job would decrease so it becomes 1/2 of current time). Evaluate number of terminals we can support, with response time below 3s. "
If both SISD and SIMD machines run at same clock speed, determine the speedup gain of using the SIMD computer over the SISD computer?
Was regulation alternative to competition in early years of telephone industry?
Assume that the initial value of R3 is R2 + 496. Use the classic five-stage RISC integer pipeline and assume all memory accesses take 1 clock cycle.
Provide two examples of threats to boats/ships for which manufactures and/or regulators have instituted controls. Describe the vulnerabilities for which the controls were created.
Explain origins/genesis of wireless networking.
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Explain techniques to apply to recover passwords from the protected files.
The mind body dualism, in philosophy, maintains that mind and the brain are 2-distinct categories and one cannot be explained in terms of the other, Mental phenomena are not physical and cannot be explained in physical terms.
Determine a smallest-last vertex ordering and plot degree when deleted diagram for given random geometric graphs.
Many resources will suggest that in the next few coming years, smartphones will become the one of the most important digital devices we own. Explain the implications of this statement.
Describe the threat of account harvesting. Suggest a method to execute an account harvesting attack on a Windows platform.
Write and explain briefly the three kinds of information security policy as described by NIST SP 800-14. Write and explain briefly four elements that must be present in Enterprise Information Security Policy.
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