What does coalescing a tablespace do?

Correct Answer: ALTER SYSTEM SWITCH LOGFILE;

Correct Answer: Redo logs are logical and physical structures that are designed to hold all the changes made to a database and are intended to aid in the recovery of a database

Correct Answer: A Control file records the physical structure of the database It contains the following information Database Name ,Names and locations of a database?s files and redolog files Time stamp of database creation

Correct Answer: You get this error when you get a snapshot too old within rollback It can usually be solved by increasing the undo retention or increasing the size of rollbacks You should also look at the logic involved in the application getting the error message

Correct Answer: Use the buffer cache advisory over a given workload and then query the v$db_cache_advice table If a change was necessary then I would use the alter system set db_cache_size command

Correct Answer: ALTER TABLESPACE ADD DATAFILE SIZE

Correct Answer: ALTER DATABASE DATAFILE RESIZE ;

Correct Answer: ALTER INDEX REBUILD;

Correct Answer: Use the DBMS_SESSIONSET_SQL_TRACE or Use ALTER SESSION SET SQL_TRACE = TRUE;

Correct Answer: A distributed database is a network of databases managed by multiple database servers that appears to a user as single logical database The data of all databases in the distributed database can be simultaneously accessed and modified