Oracle DBA 创建数据库试题选

注：答案在选项后面 Q. 1 : This symbol, When you put infront of a line in the parameter file, signifies a comment

　　1. $
　　2. @
　　3. #
　　4. !

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　　Q. 2 : When you change a parameter value in the parameter file, when will that change takes affect?

　　1. Immediately after saving the parameter file
　　2. At the first CHECKPOINT after saving the paramter file
　　3. When the DBWR finishes writing all the dirty buffers to the disk
　　4. At the next instance startup

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　　Q. 3 : ALTER SYSTEM DEFFERED command modifies the global parameters for

　　1. existing sessions after a certain amount of time
　　2. new sessions only
　　3. existing and new sessions
　　4. depends on the SPIN_COUNT initialization parameter

　　2

　　Q. 4 : The location where debugging trace files for back ground processes are written, is specified by

　　1. LOGFILE_DEST
　　2. Oracle_HOME
　　3. BACKGROUND_DUMP_DEST
　　4. CORE_DUMP_DEST

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　　Q. 5 : In case of heavy contention for latches,set the LOG_SIMULTANEOUS_COPIES initialization parameter to

　　1. Twice the number of CPUs
　　2. Same as the DB Block Buffers
　　3. Same as the Shared Pool Size
　　4. None of the above

　　4

　　Q. 6 : What is the first step in manually creating a new database

　　1. Startup an instance
　　2. Start SQL*Plus and connect to Oracle as SYSDBA
　　3. Check the instance identifier for your system
　　4. Create a parameter file

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　　Q. 7 : Which of the following is true regarding control files

　　1. Oracle recommeds atleast two control files stored on two separate disks
　　2. Oracle recommeds atleast two control files stored on one disk
　　3. Oracle recommeds to store one control file
　　4. One control file is not enough to run a database

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　　Q. 8 : Tom created a database with a DB_BLOCK_SIZE of 2k, he wants to increase this to 4k, what is his next step

　　1. Issue ALTER SYSTEM SET DB_BLOCK_SIZE=4k command
　　2. recreate the database with the new setting
　　3. It can be done in both the ways
　　4. the DB_BLOCK_SIZE cannot be 4k

　　2

　　Q. 9 : Howmany rollback segments are required for Oracle to startup apart from SYSTEM rollback segment

　　1. Oracle can start with just the system rollback segment
　　2. Oracle Needs atleast 3 rollback segments before it can start
　　3. Oracle Needs a Temp Rollback Segment before it can start
　　4. None of the above

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　　Q. 10 : The unit of measurement for DB_BLOCK_SIZE intialization parameter is

　　1. BLOCKS
　　2. BYTE
　　3. PAGE
　　4. ROW

　　2

　　Q. 11 : This tablespace is a must before you run the database instance

　　1. ROLLBACK
　　2. TOOLS
　　3. TEMP
　　4. SYSTEM

　　4

　　Q. 12 : Which initialization parameter determines the rollback segments that can be used by Oracle

　　1. ROLLBACKS
　　2. LOGFILE GROUP
　　3. ROLLBACK_SEGMENTS
　　4. DBA_ROLLBACK_SEGS

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　　Q. 13 : Which of the following is a valid but undocumented parameter in Oracle

　　1. _CORRUPT_RBS
　　2. _CORRUPT_REDO
　　3. _CORRUPT_ROLLBACK_SEGMENTS
　　4. None of the above

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