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单选题You are maintaining the SALES database.You have added a new disk to a disk group. Automatic Storage Management performs the rebalancing activity. You want to speed up the rebalancing activity.Which parameter should you specify to control the speed of t

题目
单选题
You are maintaining the SALES database.You have added a new disk to a disk group. Automatic Storage Management performs the rebalancing activity. You want to speed up the rebalancing activity.Which parameter should you specify to control the speed of the rebalancing activity?（）
A

ASM_POWER_LIMIT

B

ASM_DISKSTRING

C

ASM_DISKGROUPS

D

INSTANCE_TYPE

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第1题：

You are maintaining the SALES database.You have added a new disk to a disk group. Automatic Storage Management performs the rebalancing activity. You want to speed up the rebalancing activity.Which parameter should you specify to control the speed of the rebalancing activity?（）

A. ASM_POWER_LIMIT

B. ASM_DISKSTRING

C. ASM_DISKGROUPS

D. INSTANCE_TYPE


参考答案：A

第2题：

You are maintaining the SALES database.You have added a new disk to a disk group. Automatic Storage Management performs the rebalancing activity. You want to speed up the rebalancing activity.Which parameter should you specify to control the speed of the rebalancing activity?（）

  • A、ASM_POWER_LIMIT
  • B、ASM_DISKSTRING
  • C、ASM_DISKGROUPS
  • D、INSTANCE_TYPE

正确答案:A

第3题：

You are the database administrator for a retail company. The company owns 270 stores. Every month, each store submits approximately 2,000 sales records, which are loaded into a SQL Server 2000 database at the corporate headquarters.

A Data Transformation Services (DTS) package transforms the sales records, as they are loaded. The package writes the transformed sales records to the Sales table, which has a column for integer primary key values. The IDENTITY property automatically assigns a key value to each transformed sales record.

After loading this month's sales data, you discover that a portion of the data contains errors. You stop loading data, identify the problem records, and delete those records from the database.

You want to reuse the key values that were assigned to the records that you deleted. You want to assign the deleted key values to the next sales records you load. You also want to disrupt users' work as little as possible.

What should you do?

A．Export all records from the Sales table to a temporary table. Truncate the Sales table, and then reload the records from the temporary table.

B．Export all records from the Sales table to a text file. Drop the Sales table, and then reload the records from the text file.

C．Use the DBCC CHECKIDENT statement to reseed the Sales table's IDENTITY property.

D．Set the Sales table's IDENTITY_INSERT property to ON. Add new sales records that have the desired key values.


正确答案：C
解析：Explanation: DBCC CHECKIDENT is used to check the current identity value for the specified table. It can be set to correct the identity value by specifying the RESEED option with DBCC CHECKIDENT.

Note: Example:
Assume that we have a table called test with an identity column with seed (1,1) and 1000 rows and that we delete row 901 to 950. We could then issue the command
DBCC CHECKIDENT (test, reseed, 900)

And load the 50 missing rows. These rows would get the values 901, 902, …,950 in the identity column.
We should then set the identity value to 1000 again:
DBCC CHECKIDENT (test, reseed, 1000)

So that the next new row will have identity 1001.

Incorrect Answers:
A: Exporting the data from the Sales table and then reloading the data will not correct errors contained in the table as these errors will also be exported as they are part of the data already in the table.
B: Exporting the data from the Sales table and then reloading the data will not correct errors contained in the table as these errors will also be exported as they are part of the data already in the table.

D: The SET IDENTITY_INSERT command allows explicit values to be inserted into the identity column of a table. To reuse the old key values from the rows that was deleted would require manual commands and would be awkward. This is not the best solution.

第4题：

You are maintaining the SALES database. You have added a new disk to a disk group. Automatic StorageManagement performs the rebalancing activity. You want to speed up the rebalancing activity.Which parameter should you specify to control the speed of the rebalancing activity?（）

  • A、ASM_POWER_LIMIT
  • B、ASM_DISKSTRING
  • C、ASM_DISKGROUPS
  • D、INSTANCE_TYPE

正确答案:A

第5题：

You are maintaining the SALES database for an organization. You have enabled the Flashback Database feature and want to estimate the flashback space required for future operations.  Which view would you query to estimate the flashback space required？（）

  • A、 V$DATABASE
  • B、 V$FLASHBACK_DATABASE_STAT
  • C、 V$FLASHBACK_DATABASE_LOG
  • D、 V$RECOVERY_FILE_DEST

正确答案:B

第6题：

You are using a recovery catalog to maintain Recovery Manager (RMAN) backup information for yourproduction database. You have registered your production database and are performing regular backups.Because of a new requirement you have added a few new tablespaces to your production database and youwant them to be included in backups.Identify two options for completing this task. （）(Choose two.)

A. Reregistering the target database in recovery catalog

B. Transporting the new tablespaces to the recovery catalog database

C. Syncronizing the recovery catalog with the target database control file

D. Performing a fresh backup of the target database to include the new data files in the catalog database


参考答案：C, D

第7题：

You are maintaining the SALES database for eSoft Corporation. You have not configured ASMM on the database. You want to know what size of the SGA will provide the best performance.  Which advisor would you use to determine the suitable size of the SGA？（）

  • A、 SQL Tuning Advisor
  • B、 Undo Advisor
  • C、 ADDM
  • D、 Memory Advisor

正确答案:D

第8题：

Your network contains a Windows Server Update Services (WSUS) server.You have an organizational unit (OU) named Sales. The Sales OU contains all of the computer objects for the sales department. You enable client-side targeting for the Sales OU and set the target group name to Sales-Computers.You restart a sales computer.You discover that the computer is not added to the Sales-Computer computer group in WSUS.You need to ensure that all sales computers are added to the Sales-Computers group.Which options should you configure?（）

A. Automatic Approvals

B. Computers

C. Personalization

D. Products and Classifications


参考答案：B

第9题：

You are maintaining your database in Oracle10g. You are not using the recovery catalog to maintain the backup metadata information. You want to enable the reusable section of the control file to expand itself if the oldest record cannot be reused， and whenever a new record is added to the reusable section of the control file. Which value will you set for the CONTROL_FILE_RECORD_KEEP_TIME parameter？（）

  • A、 Zero
  • B、 One or more
  • C、 NONE
  • D、 DEFAULT

正确答案:B

第10题：

Sales details are being stored on a daily basis in the SALES_2007 table. A large amount of data is added to the table daily. To save disk space, you issued the following command: ALTER TABLE sales_2007 COMPRESS FOR ALL OPERATIONS; What would be the outcome of this command?（）

  • A、It produces an error because data already exists in the table.
  • B、It produces an error because compression can be enabled at table creation only.
  • C、It compresses all data added or modified henceforth but the existing data in the table is not compressed immediately.
  • D、It immediately compresses all existing data as well as new data, resulting from either fresh additions or modifications to existing data.

正确答案:C

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