What is CDB$ROOT in a multitenant database?
The root container that stores common metadata and users
A user-created PDB
The backup of the CDB
A tablespace of temporary data
What does Oracle RAC provide?
Several databases on one server
A backup of one instance
An SQL optimizer
Multiple instances on different servers accessing one database
What is Oracle ASM?
An SQL management tool
A backup tape library
A volume manager and file system for Oracle database files
A password manager
What are V$ views?
Views created by users
Static copies of tables
Views of archived data only
Dynamic performance views showing current instance and database activity
What do the prefixes USER_, ALL_ and DBA_ in data dictionary views mean?
Old, current, future objects
Read, write, delete privileges
Tables, indexes, views
Own objects, objects accessible to the user, and all objects in the database
What is the Automatic Diagnostic Repository (ADR)?
A backup repository
A central file-based repository for diagnostic data such as logs and traces
A table in SYSTEM
A network registry
What does the alert log contain?
Chronological messages and errors about database operations
User passwords
Table data
SQL scripts only
What does AUTOEXTEND ON do for a datafile?
Makes the file read-only
Deletes old data
Allows the file to grow automatically when it is full
Compresses the file
What is a bigfile tablespace?
A tablespace with 1000 files
A tablespace for large users only
A tablespace made of one very large datafile
A tablespace that is read-only
In a locally managed tablespace, how are free extents tracked?
By the data dictionary tables
By the control file
By the redo logs
By bitmaps stored in the datafile headers