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DataBase Administrator (DBA) Interview Questions and Answers

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204. What is Tablespace Quota?

The collective amount of disk space available to the objects in a schema on a particular tablespace.


205. What are the different Levels of Auditing?

Statement Auditing, Privilege Auditing and Object Auditing.


206. What is Statement Auditing?

Statement auditing is the auditing of the powerful system privileges without regard to specifically named objects


207. What are the database administrators utilities available?

SQL * DBA - This allows DBA to monitor and control an ORACLE database. SQL * Loader - It loads data from standard operating system files (Flat files) into ORACLE database tables. Export (EXP) and Import (imp) utilities allow you to move existing data in ORACLE format to and from ORACLE database.


208. How can you enable automatic archiving?

Shut the database Backup the database Modify/Include LOG_ARCHIVE_START_TRUE in init.ora file. Start up the database.


209. What are roles?

Roles are named groups of related privileges that are granted to users or other roles.


210. How can we implement roles?

Roles are the easiest way to grant and manage common privileges needed by different groups of database users. Creating roles and assigning provides to roles. Assign each role to group of users. This will simplify the job of assigning privileges to individual users.


211. What are the use of Roles?

REDUCED GRANTING OF PRIVILEGES - Rather than explicitly granting the same set of privileges to many users a database administrator can grant the privileges for a group of related users granted to a role and then grant only the role to each member of the group. DYNAMIC PRIVILEGE MANAGEMENT - When the privileges of a group must change, only the privileges of the role need to be modified. The security domains of all users granted the group’s role automatically reflect the changes made to the role. SELECTIVE AVAILABILITY OF PRIVILEGES - The roles granted to a user can be selectively enable (available for use) or disabled (not available for use). This allows specific control of a user’s privileges in any given situation. APPLICATION AWARENESS - A database application can be designed to automatically enable and disable selective roles when a user attempts to use the application.


212. Auditing

To aid in the investigation of suspicious db use. Statement Auditing is the auditing of specific SQL statements. Privilege Auditing is the auditing of the use of powerful system privileges. Object Auditing is the auditing of access to specific schema objects.


213. Audit Trial

Results of audited operations are stored in a table in data dictionary.

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