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
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

 datafile

B

 alert log

C

 dynamic views

D

 control file script


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单选题You work in a company which is named Wiikigo Corp. The company uses SQL Server 2008. You are the administrator of the company database. Now you are in charge of a SQL Server 2008 instance. There is a database named Dworks in the instance. The Dworks database has the Products table. Now you have to replicate the Products table to the SQL Server instances at remote locations, so you create a Merge Replication topology and a Publication to do this. The Publication has a 21-day retention period. There is a user who goes on a business trip, 30 days later he comes back and finds that data in his database is not the latest. The Windows Event log states the following error message: "Replication: expired subscription dropped." You must get the latest data in the user's database and make sure that future data changes are appropriately replicated. So what action should you perform to achieve this goal? ()AYou should recreate the publication BYou should upload unsynchronized changes. CYou should reinitialize the publication and generate a new snapshot at once. DYou should upload unsynchronized changes, and then reinitialize the publication

单选题You are working as a DBA at NetFx Corporation. You discover that the SCOTT schema is deleted by mistake. You decide to flash the database back to the time when the schema existed. Which view will you query to determine the estimated size of the flashback data that you require for your current target retention?()A V$FLASHBACK_DATABASE_LOGB V$FLASHBACK_DATABASE_STATC V$DATABASED V$UNDOSTAT

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