1. Do you think the Poisson distribution, which assumes independent arrivals, is a good estimation of arrival rates in the following queuing systems? Defend your position in each case.

(a) Cafeteria in your school

(b) Barbershop

(c) Hardware store

(d) Dentist’s office

(e) College class

(f) Movie theater

2. The Edge Convenience Store has approximately 300 customers shopping in its store between 9 a.m. and 5 p.m. on Saturdays. In deciding how many cash registers to keep open each Saturday, Edge’s manager considers two factors: customer waiting time (and the associated waiting cost) and the service costs of employing additional checkout clerks. Checkout clerks are paid an average of $10 per hour. When only one is on duty, the waiting time per customer is about 10 minutes (or 1 6 hour); when two clerks are on duty, the average checkout time is 6 minutes per person; 4 minutes when three clerks are working; and 3 minutes when four clerks are on duty.

Edge’s management has conducted customer satisfaction surveys and has been able to estimate that the store suffers approximately $13 in lost sales and goodwill for every hour of customer time spent waiting in checkout lines. Using the information provided, determine the optimal number of clerks to have on duty each Saturday to minimize the store’s total expected cost.

 

 

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1. Do you believe that the trouble with Philadelphia’s water billing system is a technical problem or a people problem? Why?

 

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1. Discuss the issues associated with signature based versus anomalous behavior anti-virus algorithms.

2. Please read the KPMG report in the link https://assets.kpmg/content/dam/kpmg/pdf/2014/05/cyber-security-not-just-technology.pdf . Which of the five mistakes, do you think, is more common in an organization/business of your choice? Which of the three options would be more challenging in taking action (risk assessment, changing organizational culture or determining the budget)?

3. Considering the five styles of conflict management listed by Kenneth W. Thomas, which method do you think would be more effective in a cybersecurity team and what could be the more common challenges related to communication in cybersecurity teams?

4. What is a static ARP table and what is the disadvantage of using one?

5. What is the difference between active spoofing and blind spoofing?

6 How would an attacker perform TCP session hijacking with packet blocking?

7 How common are duplicate packets and retransmission on most TCP/IP networks?

8 Discuss the issues associated with signature based versus anomalous behavior anti-virus algorithms

 

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1. During the discussion of memory consistency models, we often referred to the contract between the software and memory. Why is such a contract needed?

2. A multiprocessor has a single bus. Is it possible to implement strictly consistent memory?

3. In an example of a sequentially consistent memory is shown. Make a minimal change to P2 that violates sequential consistency.

 

 

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1.Each process area in termed of specific goals and specific practices are defined in A.CMMI B.SEI C.CMI D.SE 2. Most important technology on world stage is A.computer hardware B.computer software C.automobile D.play station 3. Model which is useful when developer is not sure of requirements, or efficiency of an algorithm , business rules, response time, etc is A.Waterfall model B.Incremental model C.Prototyping model D.RAD model 4. Capability level in which process area is adapted and optimized using quantitative means to meet changing customer needs and to continually improve efficacy of process area under consideration in A.Level2:Managed B.Level3:Defined C.Level4:Quantitatively Managed D.Level5:Optimized

 

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