Online Access Free Oracle.1z0-062.v2022-01-28.q200 Practice Test (Page 13)

1z0-062 Exam Question 56

A warehouse fact table in your Oracle 12c Database is range-partitioned by month and accessed frequently with queries that span multiple partitions The table has a local prefixed, range partitioned index.
Some of these queries access very few rows in some partitions and all the rows in other partitions, but these queries still perform a full scan for all accessed partitions.
This commonly occurs when the range of dates begins at the end of a month or ends close to the start of a month.
You want an execution plan to be generated that uses indexed access when only a few rows are accessed from a segment, while still allowing full scans for segments where many rows are returned.
Which three methods could transparently help to achieve this result? (Choose three.)

A.Using a partial local Index on the warehouse fact table month column with indexing disabled to the table partitions that return most of their rows to the queries.

B.Using a partial local Index on the warehouse fact table month column with indexing disabled for the table partitions that return a few rows to the queries.

C.Using a partitioned view that does a UNION ALL query on the partitions of the warehouse fact table, which retains the existing local partitioned column.

D.Converting the partitioned table to a partitioned view that does a UNION ALL query on the monthly tables, which retains the existing local partitioned column.

E.Using a partial global index on the warehouse fact table month column with indexing disabling for the table partitions that return most of their rows to the queries.

F.Using a partial global index on the warehouse fact table month column with indexing disabled for the table partitions that return a few rows to the queries.

1z0-062 Exam Question 57

Which two statements are true about extents?

A.Blocks belonging to an extent can be spread across multiple data files.

B.The blocks of a newly allocated extent, although free, may have been used before.

C.Data blocks in an extent are automatically reclaimed for use by other objects in a tablespace when all the rows in a
table are deleted.

D.Data blocks in an extent are logically contiguous but can be non-contiguous on disk.

1z0-062 Exam Question 58

Which activity is audited by default and recorded in the operating system audit trail irrespective of whether or not database auditing is enabled?

A.execution of SQL statements by users connected with the SYSDBA privilege

B.creation of a fine-grained audit policy

C.configuration of unified auditing mode

D.usage of the AUDIT statement

1z0-062 Exam Question 59

Examine the parameters for a database instance:

Which two statements are true? (Choose two.)

A.Undo records for temporary tables are stored in the undo tablespace and logged in the redo.

B.Undo records for temporary tables are stored in a temporary tablespace.

C.No redo and undo records are generated for temporary tables.

D.Undo records for temporary tables are stored in the undo tablespace and logged in the redo only for those sessions where temporary undo is enabled.

E.No redo is generated for the undo records belonging to temporary tables.

1z0-062 Exam Question 60

Which three statements are true about adaptive SQL plan management?

A.It automatically performs verification or evolves non-accepted plans, in COMPREHENSIVE mode when they perform better than existing accepted plans.

B.The optimizer always uses the fixed plan, if the fixed plan exists in the plan baseline.

C.It adds new, bettor plans automatically as fixed plans to the baseline.

D.The non-accepted plans are automatically accepted and become usable by the optimizer if they perform better than the existing accepted plans.

E.The non-accepted plans in a SQL plan baseline are automatically evolved, in COMPREHENSIVE mode, during the nightly maintenance window and a persistent verification report is generated.

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