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Question ID 2526	Examine the parallelism parameter for your instance:   parallel_servers_target Now examine the resource plan containing parallel statement directives: Consumer Group resource plan containing parallel statement directives:   Which two are true about parallel statement queuing when this plan is active?
Option A	A.    Urgent_group sessions collectively can consume up to 64 parallel execution servers before queuing starts for this consumer group.
Option B	B.    ETL_GROUP sessions can collectively consume up to 64 parallel execution servers before the queuing starts for this consumer.
Option C	C.    A single OTHER_GROUPS session will execute serially once it is queued for six minutes.
Option D	D.    A single ETL_GROUP session can consume up to eight parallel execution servers.
Option E	E.    A single ETL_GROUP session can consume up to 32 parallel execution servers.
Option F	F.    A single OTHER_GROUPS session will execute in parallel once it is queued for six minutes.
Correct Answer	A,D

Explanation

Question ID 2527	You are administering database that supports an OLTP workloads. Most of the queries use an index range scan or index unique scan as access methods. Which three scenarios can prevent the index access being used by the queries?
Option A	A.    When highly selective filters is applied on an indexed column of a table with sparsely populated blocks.
Option B	B.    When the rows are filtered with an IS NULL operator on the column with a unique key defined
Option C	C.    When the histogram statistics are not collected for the columns used in where clause.
Option D	D.    When a highly selective filter is applied on the indexed column and the index has very low value for clustering factor.
Option E	E.    When the statistics for the table are not current.
Correct Answer	A,B,E

Explanation

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