January 2021

1.Specify a template dependency for join dependencies. 2. Specify all the inclusion dependencies for the relational schema of Figure 5.5. 3. Prove that a functional dependency satisfies the formal definition of multivalued dependency. 4. Consider the example of normalizing the LOTS relation in Section 10,4. Determine whether the decomposition of LOTS into {LOTSIAX, LOTSIAY, LOTSIB, […]

Watch the video and then describe how one aspect of your own social background has affected your ability to do well in life (life chances) For example: You might realize that you were able to secure a job with a higher salary and great healthcare because you could meet the bilingual prerequisite. As a result

Submit a 2- to 4- page paper, in which you: Identify specific messages about gender presented in the mass media. Discuss messages about gender you have received from your family or cultural group. Analyze how these messages have influenced your experience with gender. Explain how you might address issues related to sexism in the mass

1.Discuss the guidelines for physical database design in RDBMSs. Discuss the types of modifications that may be applied to the logical database design of a relational database. 3. Under what situations would denormalization of a database schema be used? Give examples of denormalization. 4. Discuss the tuning of indexes for relational databases. 5. Discuss the

1.Illustrate the types of changes to SQL queries that may be worth considering for improving the performance during database tuning. 2. What functions do the typical database design tools provide? 3. What is meant by the concurrent execution of database transactions in a multiuser system? Discuss why concurrency control is needed, and give informal examples.

1.Discuss the actions taken by the read_i tern and wri te_i tern operations on a database. 2. Draw a state diagram, and discuss the typical states that a transaction goes through during execution. 3. What is the system log used for? What are the typical kinds of records in a system log? What are transaction

Discuss the atomicity, durability, isolation, and consistency preservation propertiesof a database transaction. 2. What is a schedule (history)? Define the concepts of recoverable, cascadeless, and strict schedules, and compare them in terms of their recoverability. 17.8. Discuss the different measures of transaction equivalence. What is the difference between conflict equivalence and view equivalence?

1.Describe the four levels of isolation in SQL. 2. Define the violations caused by each of the following: dirty read, nonrepeatable read, and phantoms. 3.. Add the operation commit at the end of each of the transactions T[ and Tz from Figure 17.2; then list all possible schedules for the modified transactions. Determine which of

1.How many serial schedules exist for the three transactions in Figure 17.8(a)?What are they? What is the total number of possible schedules? 2. Write a program to create all possible schedules for the three transactions in Figure 17.8(a), and to determine which of those schedules are conflict serializable and which are not. For each conflict

1.Why is an explicit transaction end statement needed in SQL but not an explicit begin statement? 2. Describe situations where each of the different isolation levels would be useful for transaction processing. 3. Which of the following schedules is (conflict) serializable? For each serializable schedule, determine the equivalent serial schedules. a. rl(X); r3(X); WI(X); r2(X); W3(X);