Oracle Exam 1Z0-084 Topic 10 Question 30 Discussion

Actual exam question for Oracle's 1Z0-084 exam

Question #: 30
Topic #: 10

Which three statements are true about using the in Memory (IM) column store?

AIt does not improve performance for queries using cached results of function evaluations on columns from the same table.

BIt does not improve performance for queries that use join groups on columns from different tables.

CIt can improve OLTP workload performance by avoiding the use of indexes.

DIt does not improve performance for queries using user-defined virtual column results.

EIt does not require all database data to fit in memory to improve query performance.

FIt improves performance for queries joining several tables using bloom filter joins.

Show Suggested Answer

Suggested Answer: A, E

Regarding space usage in temporary tablespaces, the following statements are true:

A (Correct): When a global temporary table or a sort operation exceeds the available memory, Oracle Database allocates space in a temporary tablespace to store the temporary data or intermediate results.

E (Correct): Using temporary tablespace groups can prevent insufficient temporary tablespace for sort operations by providing a collective pool of space from multiple temporary tablespaces, which can be used for user sorting operations.

The other options provided have inaccuracies:

B (Incorrect): Oracle does not provide a mechanism for setting quotas on temporary tablespaces. Quotas can be set for permanent tablespaces but not for temporary ones.

C (Incorrect): A sort operation may fail due to insufficient space, but Oracle will attempt to allocate space in the temporary tablespace dynamically. If no space can be allocated, an error is returned rather than a sort failure.

D (Incorrect): If a session consumes all available temporary tablespace storage, Oracle will not hang the session; it will return an error to the session indicating that it has run out of temporary space.

Oracle Database Administrator's Guide: Managing Space for Schema Objects

Oracle Database Concepts: Temporary Tablespaces

by Bonita at Mar 03, 2025, 09:11 AM

Limited Time Offer

25%

Off

Get Premium 1Z0-084 Questions as Interactive Web-Based Practice Test or PDF

Contribute your Thoughts:

Submit Cancel

Jacki

1 months ago

I'm pretty sure F is true. The IM column store is great for joining multiple tables, especially with those fancy bloom filters. Oh, and C is true too - no more indexes, baby!

upvoted 0 times

Sabra

13 days ago

I agree, F is definitely true. Bloom filter joins are a game changer.

upvoted 0 times

...

2 months ago

I think A, B, and E are true. The IM column store doesn't improve performance for cached functions or joins, but it doesn't require all data to fit in memory.

upvoted 0 times