Multi version concurrency control or MVCC is used to avoid unnecessary locking of the database. This removes the time lag for the user to log into his database. This feature or time lag occurs when some one else is on the content. All the transactions are kept as a record.
What is Oracle Block? Can two Oracle Blocks have the same address?
Name the buffer in which all the commands that are typed in are stored?
What is join dependency and inclusion dependency?
What is durability in DBMS?
What do you mean by atomicity and aggregation?
What is a Phantom Deadlock?
What are the different phases of transaction?
What is a checkpoint and When does it occur?
What do you mean by flat file database?
What is transparent DBMS?
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