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21
Indexes are created to enforce uniqueness on columns and to enable fast retrieval by column values.
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Answer: Option A
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22
Money is defined in Oracle with the Currency data type.
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Answer: Option B
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23
The default extension for SQL*Plus is .sql.
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Answer: Option A
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24
The left-leaning slash tells Oracle to execute whatever statement is in the buffer.
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Answer: Option B
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25
Oracle maintains a System Change Number (SCN) which is a database-wide value that is incremented by Oracle whenever database changes are made.
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Answer: Option A
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26
The semicolon terminates a SQL statement (and executes it).
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Answer: Option A
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27
SQL*Plus is a text editor.
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Answer: Option A
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28
When you type Start FILENAME, the statement in your file will be executed automatically.
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Answer: Option A
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29
You can check on the status of tables with the DESCRIBE or DESC command.
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Answer: Option A
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30
Oracle directly supports the definition of surrogate keys.
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Answer: Option B
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