____ ensures that once transaction changes are done, they cannot be undone or lost, even in the event of a system failure. ( ) Atomicity ( ) Consistency ( ) Durability ( ) Isolation 2. In this technique, deadlock is handled through request time out whenever a transaction that requests a lock has not been granted the lock for a system-defined period of time. What is this technique? ( ) Timeouts. ( ) Wait-die timestamps. ( ) Wound-wait timestamps. ( ) Wait-for-graph. 3. This concurrency problem occurs when one transaction T2 can see intermediate results of another transaction T1 before T1 has been committed. What is this problem? ( ) Lost update problem. ( ) Uncommitted dependency problem. ( ) Inconsistent analysis problem. ( ) Unrepeatable read problem. 4.A(n) ____ lock exists when concurrent transactions are granted Read access on the basis of a common lock. ( ) binary ( ) field-level ( ) shared ( ) exclusive 5.Which of the following is an integrity constraint in the logical data model? ( ) Required data. ( ) Attribute domain constraints ( ) Referential integrity. ( ) All of the above.

Q: When an optimistic approach to concurrency control is applied, it is common for transactions to take…

A: NOTE  :-  Below i explain the answer in my own words by which you understand that it well.

Q: Explain the concept of distributed concurrency control and the various methods used to manage…

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Q: Explain the concept of distributed transactions in the context of distributed databases. How do…

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Q: How do transaction logs assist in maintaining the state of a database during system failures?

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Q: In which situations might "long-running transactions" pose challenges to system resources?

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Q: What is deadlock? Explain the necessary condition that arise deadlock ,and Deadlock Prevention.

A: Given To know all about deadlock.

Q: Describe the role of "commit" and "rollback" operations in transaction management.

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Q: How does a "dirty read" differ from a "non-repeatable read" in terms of transaction anomalies?

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Q: Describe the concept of transaction isolation levels in the context of concurrency control and…

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Q: potential issues can arise when trying to maintain isolation in concurrent transactions

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Q: Describe the "timeout" mechanism in transaction processing.

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Q: I want you to name the top three issues that emerge while dealing with transactions all at once.…

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Q: Explain the significance of "transaction states" such as active, partial commit, failed, and…

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Q: An optimistic concurrency control strategy often delays transactions. Explain.

A: Hello student Greetings   An optimistic concurrency control strategy is a technique used to manage…

Q: Transactions are often held up when an optimistic concurrency control method is used. Explain?

A: Optimistic Concurrency Control (OCC) is a concurrency control process in employment in databases to…

Q: Explain the concept of "multi-version concurrency control" (MVCC) and its role in transaction proce

A: Multi-Version Concurrency Control (MVCC) is a technique used in database systems to manage versions…

Concurrency Control

The simultaneous occurrence of two or more operations is called concurrence and the situation is called concurrency. In concurrency, the function of one operation can affect the function of the other and put data integrity at risk. Hence, management for the control of concurrency is required. The management or controlling system in the Database Management System (DBMS) that coordinates concurrent access is called the concurrency control system.