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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. "
Create the logic circuit which will decode a DTMF-like keypad. Keypad comprises of 16 keys, numbered 0 to 9, *, #, A, B, C, and D. Underneath keypad are four horizontal lines and four vertical lines.
National Information Assurance Partnership website, why is this not enough to just say "this product meets our security requirements"? Discuss what else you have to consider before selecting such a product for a system.
What are some main attributes of product and how may it help operations of organization? How do third-party plug-ins change process of diagnosing and troubleshooting errors in application?
Create a modular program which asks the user to enter monthly costs for expenses given incurred from operating his or her automobile.
Describe at least three issues/problems with Information Systems Management (ISM) in a named organization.
Assume you are an Information Systems educator, and you have been asked to make an article about emerging technologies and how important it is to be prepared to adapt to new technologies
How much would it have cost to have corrected the fault during the specification phase? What should be the best answer to this question by a software engineering?
A recent article in industry magazine discussed the ability to transfer Power over Ethernet (PoE) and emerging technology that is able to transfer Power over Fiber (PoF).
Create pseudo code for the following: Read base price. Tax is given at rate of 8.5%. If base price is over 20,000 then you should pay the extra luxury tax of 2% on base price.
UDP and TCP use 1s complement for their checksums. Assume you have following three 8-bit bytes: 01010101, 01110000, 01001100. Determine the 1s complement of sum of these 8-bit bytes?
Consider not only costs but also such issues as delivery speed, pickup schedules, drop-off locations, tracking ability, and ease of use of the website. Which service did you select? Explain why.
Let L1 be a regular language and L2 be a context-free language, both defined over the same alphabet Σ.
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