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___________ is the collection of memory structures and Oracle background processes that operates against an Oracle database.

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___________ is the collection of memory structures and Oracle background processes that operates against an Oracle database.

(a) Database

(b) Instance

(c) Tablespace

(d) Segment

I had been asked this question in a national level competition.

This interesting question is from Data-Dictionary Storage topic in portion Storage and File Structures of Database Management

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Best answer
The correct option is (b) Instance

Best explanation: Instance is a snapshot of database at any point of time.

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