A phase when a transaction may obtain locks but may not release any lock is:

Head Crash on the disk is:

A candidate key that involves more than one attribute is said to be:

Who gave the 12 rules for any RDBMS to be accepted as a full-fledged RDBMS?

Execution of a transaction in isolation preserves:

A repository of information gathered from multiple sources stored under a unified schema at a single site is:

The candidate key which is not a primary key is said to be:

Which timestamp is denoted by the W-timestamp (Q) of a transaction?

The collection of information stored in a database at a particular moment is called:

Finding relevant information from a large volume of data is called:

Which one is used to create complex entities?