Oracle DBA 数据库结构试题选2

   注：答案在选项后面 

   Q. 1 : When will the rollback information applied in the event of a database crash
　　
　　1. before the crash occurs
　　2. after the recovery is complete
　　3. immediately after re-opening the database before the recovery
　　4. roll back infrmation is never applied if the database crashes
　　
　　2
　　　
　　Q. 2 : The data dictionary tables and views are stored in
　　
　　1. USERS tablespace
　　2. SYSTEM tablespace
　　3. TEMPORARY tablespace
　　4. any of the three
　　
　　3
　　　
　　Q. 3 : Oracle uses the data dictionary tables and views
　　
　　1. to make the database user friendly
　　2. to store user data
　　3. to store application data
　　4. for proper database functioning
　　
　　4
　　　
　　Q. 4 : No data in any data dictionary tables should be deleted or altered by any user. Which of the following object is an exception to this rule,
　　
　　1. AUD$
　　2. PENDING_SESSIONS$
　　3. USER_HISTORY$
　　4. PENDING_TRANS$
　　
　　1 　　
　　
　　Q. 5 : A collection of segments is a (an)
　　
　　1. extent
　　2. segment
　　3. tablespace
　　4. database 　　
　　
　　3 　　
　　
　　Q. 6 : When the database is open, which of the following tablespaces must be online
　　
　　1. SYSTEM
　　2. TEMPORARY
　　3. ROLLBACK
　　4. USERS
　　
　　1 　
　

　
　　Q. 7 : Sorts can be managed efficiently by assigning ____ tablespace to sort operations.
　　
　　1. SYSEM
　　2. TEMPORARY
　　3. ROLLBACK
　　4. USERS
　　
　　2
　　
　　Q. 8 : The sort segment of a temporary tablespace is created
　　
　　1. at the time of the first sort operation
　　2. when the TEMPORARY tablespace is created
　　3. when the memory required for sorting is 1kb
　　4. all of the above
　　
　　1
　　　
　　Q. 9 : Which of the following segments is self administered
　　
　　1. TEMPORARY
　　2. ROLLBACK
　　3. CACHE
　　4. INDEX 　
　　
　　3 　　
　　
　　Q. 10 : What is the default temporary tablespace, if no temporary tablespace is defined
　　
　　1. ROLLBACK
　　2. USERS
　　3. INDEX
　　4. SYSTEM
　　
　　4 　
　　
　　Q. 11 : Rollback segments are used for
　　
　　1. read consistency
　　2. rolling back transactions
　　3. recovering the database
　　4. all of the above
　　
　　4 　
　　
　　Q. 12 : Rollback segment stores
　　
　　1. old values of the data changed by each transaction
　　2. new values of the data changed by each transaction
　　3. both old and new values of the data changed by each transaction
　　4. none
　　
　　1