You are managing a 24*7 database. The backup strategy for the database is to perform user-managed backups. Identify two prerequisites to perform the backups.（）

All FMS contain a navigation database. The navigation database contains the elements from which the flight plan is ______. A: constructed B: instructed C: obstructed D: restricted

Tom issued a command to startup the database. What modes does the Instance and Database pass through to finally have the database open?() A: OPEN, NOMOUNT, MOUNT B: NOMOUNT, MOUNT, OPEN C: NOMOUNT, OPEN, MOUNT D: MOUNT, OPEN, NOMOUNT

If you make a change to the information recorded in a particular block, what will happen? ( ) A: You will rewrite it. B: The change will be stored in a new block. C: A database will be updated. D: The administrator can change the database.

A“database” refers to a set of related data and the way it is ________. Access to this data is usually provided by a DBMS consisting of an integrated set of computer software that allows users to interact with one or more databases and provides access to all of the data contained in the database. A: modeled B: organized C: managed D: contained

The core of the database system is ____. A: database B: database<br/>application system C: database<br/>management system D: database<br/>administrator

A tabular database ,a distributed database and an object-oriented database are different databases.

The core of the database system is（）. A: Data model B: Database administrator C: Database D: Database management system

We will often find more in-depth coverage in a general database.

we use ( ) ,because it have search function and many Database.