Immediately after adding a new disk to or removing an existing disk from an ASM instance, you find that the performance of the database goes down initially until the time the addition or removal process is completed, and then gradually becomes normal.
Which two activities would you perform to maintain a consistent performance of the database while adding or removing disks?（）
A. Define the POWER option while adding or removing the disks
B. Increase the number of ARB processes by setting up a higher value for ASM_POWER_LIMIT.
C. Increase the number of DBWR processes by setting up a higher value for DB_WRITER_PROCESSES
D. Increase the number of slave database writer processes by setting up a higher value for DBWR_IO_SLAVES
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A. You are backing up to tape and your tape device performs its own compression.
B. You are making image copies, and you have not enabled tablespace compression.
C. You are using disk-based backups and disk space in your Flash Recovery Area, or other disk-based backup destinations are limited.
D. You are performing your backups to some device over a network where reduced network bandwidth is more important than CPU usage.
E. You are using some archival backup media, such as CD or DVD, where reducing backup sizes saves media costs and archival storage.
A. identify the segments that you should shrink
B. modify the storage parameters for the tablespace
C. automatically shrink the segments with unused space
D. check the alerts generated for the tablespace that is running low on space
A. Create two custom ADDM tasks.
B. Modify the AWR snapshot time interval to two hours.
C. Create a new scheduler window for a time period of two hours.
D. Modify the Automatic Workload Repository (AWR) snapshot retention period to two hours.
You executed the following SQL statement to shrink the EMPLOYEES table segment stored in the EXAMPLE tablespace:
ALTER TABLE employees SHRINK SPACE CASCADE;
Which statement is correct in this scenario?（）
A. The EMPLOYEES table will be changed to read-only mode during the shrink operation.
B. The indexes created on the EMPLOYEES table will need to be rebuilt after the shrink operation is over.
C. The shrink behavior will be cascaded to all dependent segments of the table that support a shrink operation.
D. Data manipulation language (DML) operations will not be possible on the EMPLOYEES table during the COMPACTION phase of the shrink operation.
The EMP table exists in your schema. You want to execute the following query:
SELECT ename, sal
FROM emp
AS OF TIMESTAMP (SYSTIMESTAMP - INTERVAL '6' MINUTE)
WHERE ename = 'ALLEN';
What are the minimum requirements for the statement to execute successfully? （）
A. ARCHIVELOG mode must be enabled
B. Row Movement must be enabled for the table
C. FLASHBACK must be set to ON for the database
D. The UNDO_MANAGEMENT parameter must be set to AUTO
E. The UNDO_RETENTION parameter must be set appropriately
You have three temporary tablespace groups named G1, G2, and G3 in your database. You are creating a new temporary tablespace as follows:
CREATE TEMPORARY TABLESPACE TEMP1 TEMPFILE '/u1/data/temp1.dbf' SIZE 10M
TABLESPACE GROUP '';
Which statement regarding the above command is correct?（）
A. It will create the tablespace TEMP1 in group G1.
B. It will create the tablespace TEMP1 in group G3.
C. It will not add the tablespace TEMP1 to any group.
D. It will create the tablespace TEMP1 in the default group.
A. fixed tables
B. heap tables
C. external tables
D. temporary tables
E. Index-Organized Tables (IOTs)
A. set SHARED_POOL_SIZE to zero
B. set STATISTICS_LEVEL to BASIC
C. set SGA_TARGET to a non-zero value
D. set DB_CACHE_SIZE to a non-zero value
E. set STATISTICS_LEVEL to TYPICAL or ALL
A. TEST_TBS is a small file tablespace.
B. TEST_TBS is a bigfile tablespace (BFT).
C. TEST_TBS is the default temporary tablespace.
D. TEST_TBS is a dictionary-managed tablespace.
A. point-in-time recovery
B. execute the ROLLBACK command with transaction number
C. flashback the database to before the transaction was committed
D. determine all the necessary undo SQL statements from FLASHBACK_TRANSACTION_QUERY and use them for recovery
最新试题
You want to enable automatic PGA memory management in your database. Which setting is required to achieve this?（）
In your production database, users report that they are unable to generate reports on an important table because it does not contain any data. While investigating the reason, you realize that another user executed the TRUNCATE TABLE command, which accidentally caused the data to be lost. Now you want to recover the lost data of the table without affecting objects in other schemas.Which method must you use to recover the lost data?（）
The BACKUP_TAPE_IO_SLAVES parameter is set to FALSE for the database instance. Which statement is true while performing a tape backup in an RMAN session?（）
After you have restored and recovered a database to a new host by using a previously performed Recovery Manager (RMAN) backup, which is the best option you would consider for the new database?（）
Which options would you consider while configuring a flash recovery area (fast recovery area in 11g Release 2) for your production database that is running in ARCHIVELOG mode?（）
Which three tasks can be performed using a duplicate database?（）
You are using Recovery Manager (RMAN) with a recovery catalog to back up your production database. The backups and the archived redo log files are copied to a tape drive on a daily basis. Because of media failure, you lost your production database completely along with the recovery catalog database. You want to recover the target database and make it functional. You consider performing the following steps to accomplish the task:Which option illustrates the correct sequence that you must use?（）
Which two statements are true about the Automatic Diagnostic Repository (ADR)?（）
The user SYS creates a job by using the following command:Which two statements are true about the job that was created by the preceding command?（）
Which three statements are true about persistent configuration?（）