Oracle DBA创建数据库试题选
Q. 1 : This symbol, When you put infront of a line in the parameter file, signifies a comment 1. $ 2. @ 3. # 4. ! 3
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 4
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 3
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
4
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 1
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 1
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 3
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 3
oracle dba数据库结构试题精选
q. 1 : physical disk resources in an 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. oracle memory structures 2. oracle i/o structures
3. oracle background processes 4. all of the above 4
q. 4 : the sga consists of the following items 1. buffer cache 2. shared pool 3. redo log buffer 4. all of the above 4
q. 5 : the area that stores the blocks recently used by sql statements is 1. shared pool 2. buffer cache 3. pga 4. uga 2
q. 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 2
q. 7 : which of the following is a valid background server processes in oracle
1. archiver
2. lgwr ( log writer ) 3. dbwr ( dbwriter ) 4. all of the above 4
q. 8 : the process that writes the modified blocks to the data files is 1. dbwr 2. lgwr 3. pmon 4. smon
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 1. dbwr 2. smon 3. ckpt
4. none of the above
4 : lgwr 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
q. 11 : the process that performs internal operations like tablespace 1. pmon 2. smon 3. dbwr 4. arch 2
q. 12 : the process that manages the connectivity of user sessions is 1. pmon 2. smon 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 mode 4. none of the above 2
q. 14 : what performs the check point in the absence of a ckpt process 1. dbwr
2. lgwr 3. pmon 4. smon
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, it is 1. cache read 2. cache hit 3. cache miss 4. cache latch 2
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
4. none of the above 3
q. 17 : if the data requested is not in the servers memory, it is referred to 1. cache disk 2. cache miss 3. cache read
4. none of the above 2
q. 18 : you can dynamically resize the following parameters in the sga 1. buffer cache 2. library cache 3. dictionary cache 4. none of the above 4
q. 19 : the memory area that stores the parsed representation of most 1. buffer cache 2. library cache 3. dictionary cache 4. none of the above 2
q. 20 : the most recently used data dictionary information is stored in 1. data dictionary cache 2. shared cache 3. buffer cache
4. none of the above
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
Oracle DBA创建数据库试题选
