Oracle DBA创建数据库试题选Word文档下载推荐.docx

1、savingfileAtfirstCHECKPOINTparamterDBWRfinisheswritingalldirtybufferstodisknextinstancestartup43ALTERSYSTEMDEFFEREDcommandmodifiesglobalparametersforexistingsessionscertainamounttimenewonlyanddependsonSPIN_COUNTinitialization24Thelocationwheredebuggingtracefilesbackgroundprocessesarewritten,isspecif

2、iedbyLOGFILE_DESTORACLE_HOMEBACKGROUND_DUMP_DESTCORE_DUMP_DEST5Incaseheavycontentionlatches,setLOG_SIMULTANEOUS_COPIESTwicenumberCPUsSameasDBBlockBuffersSharedPoolSizeNoneabove6WhatstepmanuallycreatingdatabaseStartupanStartSQL*PlusconnectOracle asSYSDBACheckidentifieryoursystemCreate7Whichfollowingt

3、rueregardingcontrolOraclerecommedsatleasttwostoredseparatedisksonestoreOnenotenoughrun18TomcreatedwithDB_BLOCK_SIZE2k,hewantsincreasethis4k,whathis1.IssueSETDB_BLOCK_SIZE=4krecreatesettingItcanbedonebothwayscannot4k9HowmanyrollbacksegmentsrequiredapartfromsegmentstartjustNeedsbeforeitTempRollbackSeg

4、ment10unitmeasurementintializationBLOCKSBYTEPAGEROW11tablespacemustROLLBACKTOOLSTEMP12determinesusedby OracleROLLBACKSLOGFILEGROUPROLLBACK_SEGMENTSDBA_ROLLBACK_SEGS13validbutundocumentedOracle _CORRUPT_RBS_CORRUPT_REDO_CORRUPT_ROLLBACK_SEGMENTSoracle dba数据库结构试题精选q. 1 : physical disk resources in an

5、oracle database are 1. control files 2. redo log files 3. data files 4. all of the above 4 q. 2 : what is a schema 1. a physical organization of objects in the database 2. a logical organization of objects in the database 3. a scheme of indexing 4. none of the above 2 q. 3 : an oracle instance is 1.

6、 oracle memory structures 2. oracle i/o structures 3. oracle background processes q. 4 : the sga consists of the following items 1. buffer cache 2. shared pool 3. redo log buffer q. 5 : the area that stores the blocks recently used by sql statements is 1. shared pool 2. buffer cache 3. pga 4. uga q.

7、 6 : which of the following is not a background server process in an oracle 1. db writer 2. db reader 3. log writer 4. smon q. 7 : which of the following is a valid background server processes in oracle1. archiver 2. lgwr （ log writer ） 3. dbwr （ dbwriter ） q. 8 : the process that writes the modifie

8、d blocks to the data files is 1. dbwr 2. lgwr 3. pmon 1 : oracle does not modify the data in data file. once the server process makes a change in the memory, dbwr writes the modified blocks back to disk. q. 9 : the process that records information about the changes made by all 2. smon 3. ckpt 4 : lg

9、wr process records the information about changes to database q. 10 : oracle does not consider a transaction committed until 1. the data is written back to the disk by dbwr 2. the lgwr successfully writes the changes to redo 3. pmon process commits the process changes 4. smon process writes the data

10、q. 11 : the process that performs internal operations like tablespace 1. pmon 3. dbwr 4. arch q. 12 : the process that manages the connectivity of user sessions is 3. serv 4. net8 1 q. 13 : the arch process is enabled when the database runs in a 1. parallel mode 2. archive log mode 3. noarchivelog m

11、ode q. 14 : what performs the check point in the absence of a ckpt process 2 : at a check point dbwr writes all data to data files from memory. at this time the datafile headers have to be updated by lgwr in the absence of a ckpt q. 15 : if an application requests data that is already in the memory,

12、 it is 1. cache read 2. cache hit 3. cache miss 4. cache latch q. 16 : if the data requested is in the memory but had to be reloaded due to 1. cache hit 2. cache refresh 3. cache reload 3 q. 17 : if the data requested is not in the servers memory, it is referred to 1. cache disk 2. cache miss 3. cac

13、he read q. 18 : you can dynamically resize the following parameters in the sga 2. library cache 3. dictionary cache q. 19 : the memory area that stores the parsed representation of most q. 20 : the most recently used data dictionary information is stored in 1. data dictionary cache 2. shared cache 3

14、. buffer cache q. 21 : the server memory that holds session-specific information is referred 1. program or private global area 2. session global area 3. temp space q. 22 : the area of memory used by the server as temporary area for sorting 1. temp space 2. sort area 3. redo buffer 4. sort buffer q.

15、23 : the fundamental unit of storage in a data file is 1. byte 2. bit 3. block q. 24 : the process that resolves the in-doubt transactions in a distributed 1. arch 2. proc 3. reco q. 25 : the size of each buffer in the database is set using this parameter 1. db_block_buffers 2. db_block_size 3. db_b

16、yte_size q. 26 : the number of block buffers in the database is set in the init.ora 1. db_block_size 2. db_block_buffers 3. db_buffer_cache q. 27 : the parameter that sets the size of the shared sql area is 1. shared_sql_area 2. shared_pool_size 3. shared_cache_size 4. none of the aboveOracle DBA 启动

17、和关闭例程试题选Q. 1 : The Database must be in this mode for the instance to be started 1. MOUNT 2. OPEN 3. NOMOUNT 4. None Q. 2 : When Oracle startups up, what happens if a datafile or redo log file not available or corrupted due to O.S Problems 1. Oracle returns a warning message and opens the database 2.

18、 Oracle returns a warning message and does not open the database 3. Oracle returns a warning message and starts the database recovery 4. Oracle ignores those files and functions normally Q. 3 : The RESTRICTED SESSION system privilege should be given to 1. Users, who need extra security while transfe

19、ring the data between client and the server through SQL*NET or NET8. 2. DBAs, who perform structural maintenance exports and imports the data. 3. All of the above 4. None of the above Q. 4 : When Starting up a database, If one or more of the files specified in the CONTROL_FILES parameter does not ex

20、ist, or cannot be opened 1. Oracle returns a warning message and does not mount the database 2. Oracle returns a warning message and mounts the database 3. Oracle ignores those files and functions normally 4. Oracle returns a warning message and starts database recovery Q. 5 : Bob tried to shutdown

21、normal, Oracle said it was unavailable, and when he tried to starup, oracle said that it was already started. What is the best mode that bob can use to force a shutdown on the server 1. NORMAL 2. ABORT 3. IMMEDIATE 4. NONE Q. 6 : Tom issued a command to startup the database. What modes does the Inst

22、ance and Database pass through to finally have the database open 1. OPEN, NOMOUNT, MOUNT 2. NOMOUNT, MOUNT, OPEN 3. NOMOUNT, OPEN, MOUNT 4. MOUNT, OPEN, NOMOUNT Q. 7 : Diane is a new dba and issued a shutdown command while her server is being used. After a while she figures that oracle is waiting for all the users to sign off. What shutdown mode did she use 3. IMME