The DB_BLOCK_CHECKINGinitialization parameter is set to TRUE. What would be the result of this setting on the data blocks being written to the datafiles， every time the DBWn writes？（）A、 The Oracle database will check all data blocks by going through the data on each block， making sure the data is self-consistent.B、 The DBWn and the direct loader will calculate a checksum and store it in the cache header of every data block when writing it to disk.C、 The Oracle database will check data blocks belonging to the SYSTEM tablespace only， by going through the data on each block， making sure the data is self-consistent.D、 The Oracle database will check data blocks belonging to the SYSAUX tablespace only， by going through the data on each block， making sure the data is self-consistent.E、 The Oracle database will check data blocks in the SYSTEM and SYSAUX tablespaces only， by going through the data on each block， making sure the data is self-consistent.
The DB_BLOCK_CHECKINGinitialization parameter is set to TRUE. What would be the result of this setting on the data blocks being written to the datafiles， every time the DBWn writes？（）
- A、 The Oracle database will check all data blocks by going through the data on each block， making sure the data is self-consistent.
- B、 The DBWn and the direct loader will calculate a checksum and store it in the cache header of every data block when writing it to disk.
- C、 The Oracle database will check data blocks belonging to the SYSTEM tablespace only， by going through the data on each block， making sure the data is self-consistent.
- D、 The Oracle database will check data blocks belonging to the SYSAUX tablespace only， by going through the data on each block， making sure the data is self-consistent.
- E、 The Oracle database will check data blocks in the SYSTEM and SYSAUX tablespaces only， by going through the data on each block， making sure the data is self-consistent.
相关考题：
You have the following requirements in relation to the detection of block corruption for your database instance:1. Check for logical self-consistency of data blocks when modified in memory.2. Checksums are calculated before and after the block change.3. Checks are performed for the lost writes to the physical standby database.Which method would help you perform the above checks automatically? （）A. Set the DB_SECUREFILE parameter to PERMITTEDB. Set the DB_ULTRA_SAFE parameter to DATA_ONLYC. Set the DB_LOCK_CHECKSUM parameter to TYPICALD. Set the DB_LOST_WRITE_PROTECT parameter to TYPICAL
The DB_BLOCK_CHECKING initialization parameter is set to OFF.Which block checking would be performed?() A. The Oracle database will perform block checking for the index blocks onlyB. The Oracle database will not perform block checking for any of the data blocksC. The Oracle database will perform block checking for the default permanent tablespace onlyD. The Oracle database will perform block checking for the data blocks in all user tablespacesE. The Oracle database will perform block checking for the data blocks in the SYSTEM tablespace only
The DB_BLOCK_CHECKING initialization parameter is set to FALSE. What level of block checking would be performed？（）A、 The Oracle database will not perform block checking for any of the data blocks.B、 The Oracle database will perform block checking for the default permanent tablespace only. C、 The Oracle database will perform block checking for the data blocks in all user tablespaces.D、 The Oracle database will perform block checking for the data blocks in the SYSTEM tablespace only.E、 The Oracle database will perform block checking for the data blocks in the SYSTEM and SYSAUX tablespaces.
In the instance of the PROD database， the checkpoint （CKPT） process runs after every minute. A database user updates the rows of the ORDERS table. Because of the configuration， the CKPT process gets initiated before the user commits the transaction. What would happen to the modified blocks when the CKPT process is started？（）A、The modified blocks would be written to the data files.B、The modified blocks would be written to the temp files.C、The modified blocks would be written to the control file.D、The modified blocks would be written to the redo log files.E、The modified blocks would be written to the archived redo log files.F、The modified blocks would be retained in the database buffer cache.
You are maintaining your database in Oracle10g. You set the value of the UNDO_RETENTION initialization parameter to zero in the initialization parameter file. What will be the impact of specifying this setting？（） A、 The database will not start.B、 The database will start but will not retain the undo data in the undo segment.C、 The database will start， and the undo segment will contain the undo data for at least one hour.D、 The database will start， and the undo segment will retain the undo data for at least 15 minutes.
What purpose would you achieve by enabling the block change tracking feature？（）A、 Eliminate the necessity for backups.B、 Perform optimized image copy backups.C、 Perform optimized incremental backups.D、 Enable checkpoint （CKPT） to perform checkpointing at every block change.E、 Enable database writer （DBWn） to write changed blocks to data files faster.
The DB_BLOCK_CHECKING initialization parameter is set to OFF. 数据库块检测初始化参数被设定为关 Which block checking would be performed?（）A、The Oracle database will perform block checking for the index blocks only B、The Oracle database will not perform block checking for any of the data blocks C、The Oracle database will perform block checking for the default permanent tablespace only D、The Oracle database will perform block checking for the data blocks in all user tablespaces E、The Oracle database will perform block checking for the data blocks in the SYSTEM tablespace only Oracle
The DB_BLOCK_CHECKING initialization parameter is set to OFF. Which block checking would be performed？（） A、 The Oracle database will perform block checking for the index blocks onlyB、 The Oracle database will not perform block checking for any of the data blocksC、 The Oracle database will perform block checking for the default permanent tablespace onlyD、 The Oracle database will perform block checking for the data blocks in all user tablespacesE、 The Oracle database will perform block checking for the data blocks in the SYSTEM tablespace only
Why can setting too low a value for the FAST_START_MTTR_TARGET parameter reduce your overall database performance？（）A、Data blocks have to be written more frequently by DBWR. B、Redo blocks have to be written more frequently by LGWR. C、You need to substantially increase the size of your database buffer cache to hold the additional checkpoint records. D、You need to substantially increase the size of your redo buffer cache to hold the additional checkpoint records.
The DB_BLOCK_CHECKING initialization parameter is set to TRUE. What would be the result of this setting on the data blocks being written to the datafiles， every time the DBWn writes？（）A、The Oracle database will check all data blocks by going through the data on each block， making sure the data is self-consistent.B、DBWn and the direct loader will calculate a checksum and store it in the cache header of every data block when writing it to disk.C、The Oracle database will check data blocks belonging to the SYSTEM tablespace only， by going through the data on each block， making sure the data is self-consistent.D、The Oracle database will check data blocks belonging to the SYSAUX tablespace only， by going through the data on each block， making sure the data is self-consistent.E、The Oracle database will check data blocks in the SYSTEM and SYSAUX tablespaces only， by going through the data on each block， making sure the data is self-consistent
You are maintaining the PROD database of TeleSoft Corporation. You have initialized the following DB_BLOCK_CHECKING parameter in the init.ora file： DB_BLOCK_CHECKING = TRUE； What will be the result of setting this parameter？（）A、 Only data blocks of the SYSTEM tablespace will be checked.B、 Only data blocks of the SYSAUX tablespace will be checked.C、 A checksum will occur only on the checkpoint.D、 A checksum will occur every time a block is modified.
You want to check all the data blocks being written to the datafiles by analyzing the data on each block every time the DBWn process writes. Which action will you perform to check the data blocks？（）A、 Set the value of the DB_BLOCK_CHECKING initialization parameter to TRUEB、 Use the ANALYZE utility.C、 Use the DBVERIFY utility.D、 Use the DBMS_REPAIR package.
Users complain SQL statements using a particular index fail. Using DBVERIFY， you find that two separate blocks in the index have become corrupt. The database data files for user data and index are very large. What is the least disruptive recover strategy available in Oracle9i？（）A、Rebuild the index using the online option. B、Take the individual data file offline (not the whole tablespace), restore and recover the data file from backup with RMAN, then set the data file online again. C、Without setting the individual data file offline, use RMAN with Block Media Recovery to restore and recover only those blocks. D、Take the individual data file (not the whole tablespace) offline, use RMAN with Block Media Recovery to restore and recover only those blocks, then set the data file online again.
You have the following requirements in relation to the detection of block corruption for your database instance： Check for logical self-consistency of data blocks when modified in memory. Checksums are calculated before and after the block change. Checks are performed for the lost writes to the physical standby database. Which method would help you perform the above checks automatically？（）A、 Set the DB_SECUREFILE parameter to PERMITTEDB、 Set the DB_ULTRA_SAFE parameter to DATA_ONLYC、 Set the DB_LOCK_CHECKSUM parameter to TYPICALD、 Set the DB_LOST_WRITE_PROTECT parameter to TYPICAL
单选题You are maintaining the PROD database of TeleSoft Corporation. You have initialized the following DB_BLOCK_CHECKING parameter in the init.ora file： DB_BLOCK_CHECKING = TRUE； What will be the result of setting this parameter？（）A Only data blocks of the SYSTEM tablespace will be checked.B Only data blocks of the SYSAUX tablespace will be checked.C A checksum will occur only on the checkpoint.D A checksum will occur every time a block is modified.
单选题In the instance of the PROD database， the checkpoint （CKPT） process runs after every minute. A database user updates the rows of the ORDERS table. Because of the configuration， the CKPT process gets initiated before the user commits the transaction. What would happen to the modified blocks when the CKPT process is started？（）AThe modified blocks would be written to the data files.BThe modified blocks would be written to the temp files.CThe modified blocks would be written to the control file.DThe modified blocks would be written to the redo log files.EThe modified blocks would be written to the archived redo log files.FThe modified blocks would be retained in the database buffer cache.
单选题The DB_BLOCK_CHECKINGinitialization parameter is set to TRUE. What would be the result of this setting on the data blocks being written to the datafiles， every time the DBWn writes？（）A The Oracle database will check all data blocks by going through the data on each block， making sure the data is self-consistent.B The DBWn and the direct loader will calculate a checksum and store it in the cache header of every data block when writing it to disk.C The Oracle database will check data blocks belonging to the SYSTEM tablespace only， by going through the data on each block， making sure the data is self-consistent.D The Oracle database will check data blocks belonging to the SYSAUX tablespace only， by going through the data on each block， making sure the data is self-consistent.E The Oracle database will check data blocks in the SYSTEM and SYSAUX tablespaces only， by going through the data on each block， making sure the data is self-consistent.
单选题The DB_BLOCK_CHECKING initialization parameter is set to OFF. 数据库块检测初始化参数被设定为关 Which block checking would be performed?（）AThe Oracle database will perform block checking for the index blocks only BThe Oracle database will not perform block checking for any of the data blocks CThe Oracle database will perform block checking for the default permanent tablespace only DThe Oracle database will perform block checking for the data blocks in all user tablespaces EThe Oracle database will perform block checking for the data blocks in the SYSTEM tablespace only Oracle
单选题Matthew has recently joined NetFx Corporation as a junior-level Database Administrator （DBA）. He is asked by his supervisor to verify the database for data block corruptions. He uses the DBVERIFY utility and finds that two data blocks are corrupted in the database. What should Matthew use to identify the corrupted blocks as well as datafiles containing these blocks？（）A datafileB alert logC dynamic viewsD control file script
单选题Users complain SQL statements using a particular index fail. Using DBVERIFY， you find that two separate blocks in the index have become corrupt. The database data files for user data and index are very large. What is the least disruptive recover strategy available in Oracle9i？（）ARebuild the index using the online option. BTake the individual data file offline (not the whole tablespace), restore and recover the data file from backup with RMAN, then set the data file online again. CWithout setting the individual data file offline, use RMAN with Block Media Recovery to restore and recover only those blocks. DTake the individual data file (not the whole tablespace) offline, use RMAN with Block Media Recovery to restore and recover only those blocks, then set the data file online again.
单选题What purpose would you achieve by enabling the block change tracking feature？（）A Eliminate the necessity for backups.B Perform optimized image copy backups.C Perform optimized incremental backups.D Enable checkpoint （CKPT） to perform checkpointing at every block change.E Enable database writer （DBWn） to write changed blocks to data files faster.
单选题The DB_BLOCK_CHECKING initialization parameter is set to FALSE. What level of block checking would be performed？（）A The Oracle database will not perform block checking for any of the data blocks.B The Oracle database will perform block checking for the default permanent tablespace only. C The Oracle database will perform block checking for the data blocks in all user tablespaces.D The Oracle database will perform block checking for the data blocks in the SYSTEM tablespace only.E The Oracle database will perform block checking for the data blocks in the SYSTEM and SYSAUX tablespaces.
单选题You are maintaining your database in Oracle10g. You set the value of the UNDO_RETENTION initialization parameter to zero in the initialization parameter file. What will be the impact of specifying this setting？（）A The database will not start.B The database will start but will not retain the undo data in the undo segment.C The database will start， and the undo segment will contain the undo data for at least one hour.D The database will start， and the undo segment will retain the undo data for at least 15 minutes.
单选题You want to check all the data blocks being written to the datafiles by analyzing the data on each block every time the DBWn process writes. Which action will you perform to check the data blocks？（）A Set the value of the DB_BLOCK_CHECKING initialization parameter to TRUEB Use the ANALYZE utility.C Use the DBVERIFY utility.D Use the DBMS_REPAIR package.
单选题You have the following requirements in relation to the detection of block corruption for your database instance: 1. Check for logical self-consistency of data blocks when modified in memory. 2. Checksums are calculated before and after the block change. 3. Checks are performed for the lost writes to the physical standby database. Which method would help you perform the above checks automatically? （）ASet the DB_SECUREFILE parameter to PERMITTEDBSet the DB_ULTRA_SAFE parameter to DATA_ONLYCSet the DB_LOCK_CHECKSUM parameter to TYPICALDSet the DB_LOST_WRITE_PROTECT parameter to TYPICAL
单选题The DB_BLOCK_CHECKING initialization parameter is set to OFF. Which block checking would be performed？（）A The Oracle database will perform block checking for the index blocks onlyB The Oracle database will not perform block checking for any of the data blocksC The Oracle database will perform block checking for the default permanent tablespace onlyD The Oracle database will perform block checking for the data blocks in all user tablespacesE The Oracle database will perform block checking for the data blocks in the SYSTEM tablespace only
单选题The DB_BLOCK_CHECKING initialization parameter is set to TRUE. What would be the result of this setting on the data blocks being written to the datafiles， every time the DBWn writes？（）AThe Oracle database will check all data blocks by going through the data on each block， making sure the data is self-consistent.BDBWn and the direct loader will calculate a checksum and store it in the cache header of every data block when writing it to disk.CThe Oracle database will check data blocks belonging to the SYSTEM tablespace only， by going through the data on each block， making sure the data is self-consistent.DThe Oracle database will check data blocks belonging to the SYSAUX tablespace only， by going through the data on each block， making sure the data is self-consistent.EThe Oracle database will check data blocks in the SYSTEM and SYSAUX tablespaces only， by going through the data on each block， making sure the data is self-consistent