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Let T1 have the operations r(y); w(y) and T2 have the operations r(y); w(y); r(x); w(x). Consider the different possible concurrent schedules for T1 and T2. From among these possible schedules
(a) Give two examples of schedules which are conflict serializable (but not serial). Explain why these are conflict serializable by drawing the precedence graph; these should not have a cycle. No other explanation needed. (b) Give two examples of schedules which are not conflict serializable. Explain why these are not conflict serializable by drawing the precedence graph; these should have a cycle. No other explanation needed.
Describes a suitable methodology from the literature for the purpose of designing, constructing and testing of a commercial BIDW for a multinational company.
Write SQL SELECT statements to retrieve the following information from the ClassicModels database - select the product name, scale, vendor and product code for all models of classic cars built between 1948 and 1966. Display the results in order of..
your database has been a hit. you have been called back to the customers headquarters and they want a detailed report
Create use case to describe a typical sales process. Then make a sequence diagram for use case.
Discuss why a relational database would be suitable for the organisation in the case study and provide three reasons for this recommendation and discuss using three advantages that a database management system provides to an organisation.
write a 200- to 300-word short-answer response for the followinga motor vehicle maintenance center wants to improve its
Database designers stated following dimension of "miniworld"- to be represented in Company Supplier-Part database: company is organized into departments. Each department has unique name, unique number.
Propose a solution capable of running on the specified hardware platform. Your analysis should include the advantages and disadvantages of Ubuntu vs. Windows Server.
Assume the data warehousing system is centralized, and implemented in the environment of Microsoft SQL Server 2012. As we discussed in the introduction, each store has its own local database.
In a "chosen ciphertext attack" the attacker has the option of choosing the ciphertext sample and having it decrypted by someone who knows the key. Wouldn't this result in pure gibberish most of the time?
Consider the timing diagram of Figure 12.10 in the 8th edition (or 14.10 in the 9th edition). Assume that there is only a two-stage pipeline (fetch, execute). Redraw the diagram to show how many time units are now required for four instructions.
Describe relationships with example. Also illustrate degree of relationship for that example. What do you mean by locks. Write dow a binary lock function.
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