Question: 2. Please answer in your ownwords a. Explain the concept of physical data independence, and its importance in database systems. b. What is a transaction?

2. Please answer in your ownwords a. Explain the concept of

2. Please answer in your ownwords 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 What is integrity? Describe d. Differentiate between an entity and an entity set. Differentiate between a relation and a relationship. Can a relationship be represented by a relation? e. f. What is the difference between a super key, a candidate key, and a primary key

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