Database Concurrency Control Techniques Quiz

Concurrency control in databases aims to enforce isolation among conflicting transactions, ensuring that a transaction's updates are not visible to other transactions until it is committed. An example of conflicting transactions is when T1 and T2 conflict over a data item A in a concurrent execution environment, and the existing concurrency control decides which transaction should get A and if the other transaction is rolled back or waits.

A lock is a variable associated with a data item that describes the status of the item with respect to possible operations that can be applied to it.

Locking is an operation that secures data items by controlling the access and operations that can be performed on them, thereby ensuring consistency and isolation among transactions.

<p>Database concurrency control helps preserve database consistency by ensuring that transactions are executed in a consistent manner, and by resolving read-write and write-write conflicts, thus maintaining the overall integrity of the database.</p> Signup and view all the answers

<p>The key goals of database concurrency control are to enforce isolation, preserve database consistency, and resolve conflicts among concurrent transactions. These goals contribute to the overall management of concurrent transactions by maintaining data integrity and ensuring that transactions are executed in a controlled and consistent manner.</p> Signup and view all the answers

<p>False</p> Signup and view all the answers

<p>True</p> Signup and view all the answers

<p>False</p> Signup and view all the answers

<p>True</p> Signup and view all the answers

<p>False</p> Signup and view all the answers