Oracle
1Z0-063 · Question #70
Examine the parameters for your database instance: NAMETYPEVALUE optimizer_adaptive_reporting_onlybooleanFALSE optimizer_capture_sql_plan_baselinesbooleanFALSE optimizer_dynamic_samplinginteger2…
The correct answer is A. The optimizer automatically changes a plan during subsequent execution of a SQL statement if C. The optimizer enables monitoring for cardinality feedback after the first execution of a query. D. The optimizer does not monitor cardinality feedback if dynamic sampling and multicolumn. See the full explanation below for the reasoning.
Question
Examine the parameters for your database instance: NAMETYPEVALUE optimizer_adaptive_reporting_onlybooleanFALSE optimizer_capture_sql_plan_baselinesbooleanFALSE optimizer_dynamic_samplinginteger2 optimizer_features_enablestring12.1.0.1 Which three statements are true about the process of automatic optimization by using statistics feedback?
Options
- AThe optimizer automatically changes a plan during subsequent execution of a SQL statement if
- BThe optimizer can re optimize a query only once using cardinality feedback.
- CThe optimizer enables monitoring for cardinality feedback after the first execution of a query.
- DThe optimizer does not monitor cardinality feedback if dynamic sampling and multicolumn
- EAfter the optimizer identifies a query as a re-optimization candidate, statistics collected by the
How the community answered
(61 responses)- A82% (50)
- B7% (4)
- E11% (7)
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