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Home > Oracle > Oracle Certifications > 1Z0-515
Oracle 1Z0-515 Exam Questions & Answers
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Oracle 1Z0-515 Exam Questions & Answers


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  • Vendor: Oracle

    Exam Code: 1Z0-515

    Exam Name: Data Warehousing 11g Essentials

    Certification Provider: Oracle

    Total Questions: 70 Q&A

    Updated on: Jun 12, 2025

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1Z0-515 Online Practice Questions and Answers

Questions 1

Indentify the true statement about REF partitions.

A. REF partitions have no impact on partition-wise joins.

B. Changes to partitioning in the parent table are automatically reflected in the child table.

C. Changes in the data in a parent table are reflected in a child table.

D. REF partitions can save storage space in the parent table.

Show Answer

Correct Answer: B

Explanation:

Reference partitioning is a partitioning method introduced in Oracle 11g. Using reference partitioning, a

child table can inherit the partitioning characteristics from a parent table.

Questions 2

You are looking to size a data warehouse configuration. If the I/O throughput for the CPUs is 25 GB/s, the I/O throughput for the HBA is 18 GB/s, and the I/O throughput for the disk subsystem is 6 GB/s, what is the overall throughput of the data warehouse?

A. 25 GB/s

B. 18 GB/s

C. 6 GB/s

D. It depends on how many processors are in the servers.

Show Answer

Correct Answer: C

Explanation:

In this scenario the disk subsystem is the bottleneck. It determines the throughput.

Note: Each of the components must provide sufficient I/O bandwidth to ensure a well-balanced I/O system.

The end-to-end I/O system consists of more components than just the CPUs and disks. A well-balanced I/

O system must provide approximately the same bandwidth across all components in the I/O system.

These components include:

*

Host bus adapters (HBAs), the connectors between the server and the storage.

*

Switches, in between the servers and a storage area network (SAN) or network attached storage (NAS).

*

Ethernet adapters for network connectivity (GigE NIC or Infiniband). In an Oracle Real Application Clusters (Oracle RAC) environment, you need an additional private port for the interconnect between the nodes that you should not include when sizing the system for I/O throughput. The interconnect must be sized separately, taking into account factors such as internode parallel execution.

*

Wires that connect the individual components.

References:

Questions 3

What would you do to compress data in partitions that are frequently updated in Oracle Database 11g?

A. Use Hybrid Columnar Compression.

B. Use Advanced Compression Option.

C. Use Hybrid Partitions.

D. Avoid compressing any data.

Show Answer More Questions

Correct Answer: B

Explanation:

Advanced Compression features in Oracle Database 11g include:

* Online Transaction Processing (OLTP) Table Compression: This breakthrough compression feature compresses table data during all types of data manipulation operations, including conventional INSERT or UPDATE. OLTP Table Compression leverages a sophisticated and intelligent algorithm that minimizes compression overhead during write operations, thereby making it viable for highly transactional workloads

References:

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