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

Correct Answer: B

Explanation:

With Oracle RAC the workload can be distributed access all cluster nodes, parallel query servers can be provided through the Parallel Query tool, and high availability can be obtained through, for example, Oracle Clusterware.

Note: Oracle RAC (Real Application Clusters) is a cluster database with a shared cache architecture that overcomes the limitations of traditional shared-nothing and shared-disk approaches to provide highly scalable and available database solutions for all your business applications. Oracle RAC is a key component of Oracle's private cloud architecture. Oracle RAC support is included in the Oracle Database Standard Edition for higher levels of system uptime. References:

Correct Answer: B

Explanation:

The database automatically invalidates a cached result whenever a transaction modifies the data or

metadata of any of the database objects used to construct that cached result.

Note: DML is abbreviation of Data Manipulation Language. It is used to retrieve, store, modify, delete,

insert and update data in database. References:

Correct Answer: A

Explanation: References:

Correct Answer: C

Explanation:

Compression is useful because it helps reduce the consumption of resources such as data space or

transmission capacity. Because compressed data must be decompressed to be used, this extra

processing imposes computational or other costs through decompression.

Correct Answer: A

Explanation: Adaptive Parallelism: The adaptive multiuser algorithm, which is enabled by default, reduces the degree of parallelism as the load on the system increases. When using the Oracle Database adaptive parallelism capabilities, the database uses an algorithm at SQL execution time to determine whether a parallel operation should receive the requested DOP or have its DOP lower to ensure the system is not overloaded. In a system that makes aggressive use of parallel execution by using a high DOP, the adaptive algorithm adjusts the DOP down when only a few operations are running in parallel. While the algorithm still ensures optimal resource utilization, users may experience inconsistent response times. Using solely the adaptive parallelism capabilities in an environment that requires deterministic response times is not advised. Adaptive parallelism is controlled through the database initialization parameter PARALLEL_ADAPTIVE_MULTI_USER.

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