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:

Which one refers to the hashing in which the number of disk accesses needed to locate a specific record is never more than two?

The role of a DBA is to:

The state while a transaction is executing is:

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

Which one is used to create complex entities?

Shadow paging is:

Projection operator:

Normal forms are used to: