When a transaction modifies the database, Oracle copies the original data before modifying it. What is the original copy of the modified data called? - Oracle Quiz

Oracle - Quiz(MCQ)

When a transaction modifies the database, Oracle copies the original data before modifying it. What is the original copy of the modified data called?

A)

Redo Data

B)

Archive Data

C)

Undo Data

D)

Undone Data

Correct Answer : Undo Data

Explanation : Before transaction happen the Oracle kept the files in Undo Data to overcome form any failure.

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A)

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B)

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C)

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D)

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