自动安平水准仪操作步骤是（)。A．安置—粗平—照准—读数B．粗平—照准—读数C．安置—粗平 照准—读数—记录

A. Set MEMORY_TARGET to zero

B. Set the STATISTICS_LEVEL parameter to BASIC

C. Set the WORKAREA_SIZE_POLICY parameter to MANUAL

D. Set the PGA_AGGREGATE_TARGET parameter to nonzero value

our 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

A. The MEMORY_MAX_TARGET parameter is automatically set to 500 MB

B. The value of the MEMORY_MAX_TARGET parameter remains zero till it is changed manually

C. The PGA_AGGREGATE_TARGET and SGA_TARGET parameters are automatically set to zero

D. The lower bounds of PGA_AGGREGATE_TARGET and SGA_TARGET parameters are set to 90 MB and 270 MB, respectively

To implement Automatic Management (AMM), you set the following parameters: When you try to start the database instance with these parameter settings, you receive the following error message:SQL > startupORA-00824: cannot set SGA_TARGET or MEMORY_TARGET due to existing internal settings, see alert log for more information.Identify the reason the instance failed to start.（）

A.The PGA_AGGREGATE_TARGET parameter is set to zero.

B.The STATISTICS_LEVEL parameter is setto basic.

C.Both the SGA_TARGETandMEMORY_TARGET paramete rsareset.

D.The SGA_MAX_SIZEandSGA_TARGET parameter value sare note qual.

A．120M

B．320M

C．480M

D．600M

A. A subplan has the PLAN_SUB parameter value set to SUB

B. A top-level plan has the GROUP_OR_PLAN parameter set to the name of the subplan in the resource-plan definition

C. There is no difference in the resource-plan definition

D. A subplan always has the CPU_MTH parameter value set to RATIO

E. The string TOP_LEVEL is appended to the name of top-level resource plans

You are connected to a pluggable database (PDB) as a common user with DBA privileges.The STATISTICS_LEVEL parameter is PDB_MODIFIABLE. You execute the following:SQL > ALTER SYSTEM SET STATISTICS_LEVEL = ALL SID = ‘*’ SCOPE = SPFILE;Which is true about the result of this command？（）

A. The STATISTICS_LEVEL parameter is set to all whenever this PDB is re-opened.

B. The STATISTICS_LEVEL parameter is set to ALL whenever any PDB is reopened.

C. The STATISTICS_LEVEL parameter is set to all whenever the multitenant container database (CDB) is restarted.

D. Nothing happens; because there is no SPFILE for each PDB, the statement is ignored.

d SQL Tuning Sets (STS) from the previous version. After changing the OPTIMIZER_FEATURE_ENABLE parameter to 10.2.0.4 and running the SQL Performance Analyzer, you observed performance regression for a few SQL statements.What would you do with these SQL statements？（）

A. Set OPTIMIZER_USE_PLAN_BASELINES to FALSE to prevent the use of regressed plans.

B. Capture the plans from the previous version using STS and then load them into the stored outline.

C. Capture the plans from the previous version using STS and then load them into SQL Management Base (SMB).

D. Set OPTIMIZER_CAPTURE_SQL_PLAN_BASELINES to FALSE to prevent the plans from being loaded to the SQL plan baseline.

A．thermometer

B．centimeter

C．paramount

D．parameter