You have the following requirements in...

单项选择题 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 PERMITTED
B. Set the DB_ULTRA_SAFE parameter to DATA_ONLY
C. Set the DB_LOCK_CHECKSUM parameter to TYPICAL
D. Set the DB_LOST_WRITE_PROTECT parameter to TYPICAL

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1.单项选择题 To control the execution of a server process when it is receiving bad packets from a potentially malicious client, you set the SEC_PROTOCOL_ERROR_FURTHER_ACTION initialization parameter as follows:
SQL> ALTER SYSTEM SET SEC_PROTOCOL_ERROR_FURTHER_ACTION = Drop,10;
What is the significance of this setting?（）

A. It terminates the client connection after 10 bad packets and the client cannot reconnect to the same instance.
B. It terminates the client connection after 10 bad packets but the client can still reconnect, and attempt the same operation again.
C. It terminates the client connection 10 seconds after receiving a bad packet and the client cannot reconnect to the same instance.
D. It terminates the client connection after receiving a bad packet and the client can reconnect to the same instance after 10 minutes.

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2.单项选择题 Examine the following command:
ALTER DISKGROUP data MOUNT FORCE;
In which scenario can you use the above command to mount the disk group? （）

A. when ASM disk goes offline
B. when one or more ASM files are dropped
C. when some disks in a disk group are offline
D. when some disks in a failure group for a disk group are rebalancing

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3.单项选择题Which statement about recovering from the loss of a redo log group is true?（）

A. If the lost redo log group is ACTIVE, you should first attempt to clear the log file.
B. If the lost redo log group is CURRENT, you must clear the log file.
C. If the lost redo log group is ACTIVE, you must restore, perform cancel-based incomplete recovery, and open the database using the RESETLOGS option.
D. If the lost redo log group is CURRENT, you must restore, perform cancel-based incomplete recovery, and open the database using the RESETLOGS option.

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4.单项选择题 You issue the following command on the RMAN prompt.
REPORT NEED BACKUP DAYS 5;
Which statement is true about executing this command?（）

A. It will display a list of files that need incremental backup
B. It will display a list of files that need backup after five days
C. It will display a list of files that were backed up in the last five days
D. It will display a list of files that have not been backed up in the last five days
E. It will apply the current retention policy to determine the files that need to be backed up

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5.多项选择题What happens when you run the SQL Tuning Advisor with limited scope?（）

A. Access path analysis is not performed for SQL statements.
B. SQL structure analysis is not performed for SQL statements.
C. SQL Profile recommendations are not generated for SQL statements.
D. Staleness and absence of statistics are not checked for the objects in the SQL Tuning Advisor. In this case, SQL Tuning Advisor produces recommendations based on statistical checks, access path analysis, and SQL structure analysis. SQL profile recommendations are not generated.

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6.单项选择题What is the advantage of setting the ASM-preferred mirror read for the Stretch cluster configuration?（）

A. It improves resync operations.
B. This feature enables much faster file opens.
C. It improves performance as fewer extent pointers are needed in the shared pool.
D.It improves performance by reading from a copy of an extent closest to the node.

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7.单项选择题You have a very large table that your users access frequently. Which of the following advisors will recommend any indexes to improve the performance of queries against this table?（）

A. The Automatic Memory Manager (AMM)
B. The SQL Tuning Advisor
C. The Segment Advisor
D. The SQL Access Advisor SQL

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8.单项选择题 View the following SQL statements:

You want to back out transaction T2. Which option would you use?（）

A. It is possible, but transaction T3 also backs out.
B. It is possible with the NOCASCADE_FORCE option.
C. It is possible with the NONCONFLICT_ONLY option.
D. It is not possible because it has conflicts with transaction T3.

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9.多项选择题You plan to use SQL Performance Analyzer to analyze the SQL workload. You created a SQL Tuning Set as a part of the workload capturing. What information is captured as part of this process?（）

A. the SQL text SQL
B. the execution plan
C. the execution context
D. the execution frequency
E. the system change number (SCN)

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10.单项选择题You have applications that have frequently executed queries, and produce small and static result sets.You configure the sqlnet.ora file in the client machine to set a nonzero value for the OCI_RESULT_CACHE_MAX_SIZE parameter. What is the purpose of this configuration?（）

A. to avoid round trips to the server by enabling caching of query results in client memory
B. to improve performance by storing a copy of the data from the private SQL area of the PGA
C. to enhance the query performance by creating a cache in the client memory for sorting operations
D. to avoid the storing of query plans and results in the server by creating a cache in the client memory

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