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OCA Oracle Database 11g Administration I Exam Guide (Exam 1Z0-052) by John Watson

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2 Exploring the Database Architecture

CERTIFICATION OBJECTIVES

2.01 Describe the Single-Instance Architecture

2.02 Explain the Memory Structures

2.03 Describe the Process Structures

2.04 Summarize the Storage Structures

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An Oracle server consists of two entities: the instance and the database. The instance is memory structures and processes; the database is files on disk. They are separate, but connected. During the creation process (detailed in Chapter 4), the instance is created first, and then the database during ...

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