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Immediate database modification technique uses(a) Both undo and redo(b) Undo but no redo(c) Redo but no undo(d) Neither undo nor redoThe question was asked at a job interview.My query is from Lock Release and Undo Operations topic in division Recovery System of Database Management |
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Answer» CORRECT ANSWER is (a) Both undo and redo Best EXPLANATION: Undo erases all the changes and redo makes the DELETED changes. |
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