Oracle 1Z0-515 dumps - 100% Pass Guarantee!

Correct Answer: C

Explanation: As its name suggests, the query result cache is used to store the results of SQL queries for re-use in subsequent executions. By caching the results of queries, Oracle can avoid having to repeat the potentially time-consuming and intensive operations that generated the resultset in the first place (for example, sorting/aggregation, physical I/O, joins etc). The cache results themselves are available across the instance (i.e. for use by sessions other than the one that first executed the query) and are maintained by Oracle in a dedicated area of memory. Unlike our homegrown solutions using associative arrays or global temporary tables, the query result cache is completely transparent to our applications. It is also maintained for consistency automatically, unlike our own caching programs. References:

Correct Answer: ACD

Explanation:

There are three major advantages of partitioning.

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Partition Pruning - Oracle only accesses a limited set of table partitions if the FROM and WHERE clause

permit it to.

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Partition-wise Joins - Where two tables that have compatible partitioning schemes are joined , Oracle

improves the efficiency of parallel operations by performing the join between individual partitions of the

tables.

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Manageability - Partitioning allows DDL operations on a large subset of table rows with some element of

commonality defined through the partitioning type.

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Correct Answer: A

Explanation: Partitioning enhances the performance, manageability, and availability of a wide variety of applications and helps reduce the total cost of ownership for storing large amounts of data. Partitioning allows tables, indexes, and index-organized tables to be subdivided into smaller pieces, enabling these database objects to be managed and accessed at a finer level of granularity. Oracle provides a rich variety of partitioning strategies and extensions to address every business requirement. Moreover, since it is entirely transparent, partitioning can be applied to almost any application without the need for potentially expensive and time consuming application changes.

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Correct Answer: A

Explanation:

Knowledge modules (KMs) in Oracle Data Integrator are components that implement reusable

transformation and ELT (extract, load, and transform) strategies across different technologies.

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Correct Answer: B

Explanation: You can use Analytic Workspace Manager for creating measures, dimensions and cubes in the OLAP database if the database was installed with the OLAP option. Workspace Manager, a feature of Oracle Database, enables application developers and DBAs to manage current, proposed and historical versions of data in the same database.

Note: Applications and DBA operations often work with more than one version of the data. Three common reasons to have multiple data versions are concurrency, auditing and scenario creation. Oracle Workspace Manager provides workspaces as a virtual environment to isolate a collection of changes to production data, keep a history of changes to data and create multiple data scenarios for "what if" analysis. It can save money, time and labor over traditional approaches.