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Oracle DBA创建数据库试题精选


发布日期:2020年10月03日
 
Oracle DBA创建数据库试题精选

Q : This symbol When you put infront of a line in the parameter file signifies a comment

$

@

#

!

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

Immediately after saving the parameter file

At the first CHECKPOINT after saving the paramter file

When the DBWR finishes writing all the dirty buffers to the disk

At the next instance startup

Q : ALTER SYSTEM DEFFERED command modifies the global parameters for

existing sessions after a certain amount of time

new sessions only

existing and new sessions

depends on the SPIN_COUNT initialization parameter

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

LOGFILE_DEST

ORACLE_HOME

BACKGROUND_DUMP_DEST

CORE_DUMP_DEST

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

Twice the number of CPUs

Same as the DB Block Buffers

Same as the Shared Pool Size

None of the above

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

Startup an instance

Start SQL*Plus and connect to Oracle as SYSDBA

Check the instance identifier for your system

Create a parameter file

Q : Which of the following is true regarding control files

Oracle recommeds atleast two control files stored on two separate disks

Oracle recommeds atleast two control files stored on one disk

Oracle recommeds to store one control file

One control file is not enough to run a database

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

Issue ALTER SYSTEM SET DB_BLOCK_SIZE=k command

recreate the database with the new setting

It can be done in both the ways

the DB_BLOCK_SIZE cannot be k

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

Oracle can start with just the system rollback segment

Oracle Needs atleast rollback segments before it can start

Oracle Needs a Temp Rollback Segment before it can start

None of the above

Q : The unit of measurement for DB_BLOCK_SIZE intialization parameter is

BLOCKS

BYTE

PAGE

ROW

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

ROLLBACK

TOOLS

TEMP

SYSTEM

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

ROLLBACKS

LOGFILE GROUP

ROLLBACK_SEGMENTS

DBA_ROLLBACK_SEGS

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

_CORRUPT_RBS

_CORRUPT_REDO

_CORRUPT_ROLLBACK_SEGMENTS

None of the above

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