Question: Please answer in your own words a. Explain the concept of physical data independence, and its importance in database systems b. What is a transaction?

Please answer in your own words a. Explain the concept of physical data independence, and its importance in database systems b. What is a transaction? Define ACID and provide a brief description of each. c. What is integrity? Describe two ways to enforce integrity in a database. d. Differentiate between an entity and an entity set. Differentiate between a relation and a relationship. Can a relationship be represented bya relation? e. f. What is the difference between a super key, a candidate key, and a primary key

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