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Oracle 1Z0-084 Exam

Oracle Database 19c: Performance Management and Tuning

Total Questions: 55

Last Updated : 16-04-2024

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Oracle 1Z0-084 Questions

Q1.

The CURS0R_SHARING and OPTIMIZER_CAPTURE_SQL_PLAN_BASELINES parameters are set to default. The top five wait events in an awr report are due to a large number of hard parses because of several almost identical SQL statements.

Which two actions could reduce the number of hard parses?

ACreate the KEEP cache and cache tables accessed by the SQL statements.

BCreate the RECYCLE cache and cache tables accessed by the SQL statements.

CIncrease the size of the library cache.

DSet OPTIMIZER_CAPTURE_SQL_PLAN_BASELINES to TRUE.

ESet the CURSOR_SHARING parameter to FORCE.

Q2.

Examine this command:

q2_1Z0-084

What is the maximum number of baselines generated by this command that you can have at any given time?

C52

Q3.

Database performance has degraded recently.

index range scan operations on index ix_sales_time_id are slower due to an increase in buffer gets on sales table blocks.

Examine these attributes displayed by querying DBA_TABLES:

q3_1Z0-084

Now, examine these attributes displayed by querying DBA_INDEXES:

q3_1Z0-084

Which action will reduce the excessive buffer gets?

ARe-create the SALES table sorted in order of index IX_SALES_TIME_ID.

BRe-create index IX_SALES_TIME_ID using ADVANCED COMPRESSION.

CRe-create the SALES table using the columns in IX_SALES_TIME_ID as the hash partitioning key.

DPartition index IX_SALES_TIME_ID using hash partitioning.

Q4.

Which two statements are true about Data Pump import for objects that used the in Memory (IM) column store in their source database?

AIt always gives preference to the IM column store clause defined at the tablespace level over table-level definitions.

BIt must always transports existing INMEMORY attributes.

CIts INMEM0RY_CLAUSE of the Data Pump Export allows modifications to IM column store clause of a table with existing INMEMORY setting.

DIts TRANSFORM clause can be used to add the INMEMORV clause to exported tables that lack them.

EIt ignores the IM column store clause of the exporting objects.

FIt can generates the INMEMORY clause that matches the table settings at export time.

Q5.

An Oracle 19c database uses default values for all optimizer initialization parameters.

After a table undergoes partition maintenance, a large number of wait events occur for:

cursor: pin S wait on X

Which command reduces the number of these wait events?

AALTER SYSTEM SET CURSOR_SHARING = FORCE;

BALTER SYSTEM SET CURSOR_SPACE_FOR_TIME - TRUE;

CALTER SYSTEM SET CURSOR_INVALIDATION = DEFERRED;

DALTER SYSTEM SET SESSION CACHED CURSORS = 500;

Solutions:

Question: 1 Answer: C, E

Question: 2 Answer: C

Question: 3 Answer: B

Question: 4 Answer: D, F

Question: 5 Answer: C

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