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Oracle Interview Questions and Answers

Ques 1. What are the components of physical database structure of Oracle database?

Ans. Oracle database is comprised of three types of files. One or more datafiles, two are more redo log files, and one or more control files.

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Ques 2. What are the components of logical database structure of Oracle database?
Ans. There are tablespaces and database's schema objects.
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Ques 3. What is a tablespace?
Ans. A database is divided into Logical Storage Unit called tablespaces. A tablespace is used to grouped related logical structures together.
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Ques 4. What is SYSTEM tablespace and when is it created?
Ans. Every Oracle database contains a tablespace named SYSTEM, which is automatically created when the database is created. The SYSTEM tablespace always contains the data dictionary tables for the entire database.
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Ques 5. Explain the relationship among database, tablespace and data file?
Ans. Each databases logically divided into one or more tablespaces one or more data files are explicitly created for each tablespace.
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