Q:Question:What is meant by the concurrent execution of database transactions in a multiuser system? Discuss why concurrency control is needed, and give informal examples Discuss the atomicity, durability, isolation, and consistency preservation properties of a database transaction. What is the two-phase locking protocol? How does it guarantee serializability? Discuss the problems of deadlock and starvation, and the different approaches to dealingA:Answer:See a step by step answer