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Modification of Database Questions and Answers PDF Download eBook
MCQ: To insert data into a relation, we specify a tuple to be
- Retrieved
- Processed
- Tested
- Inserted
D
MCQ: A protocol that permits a transaction to lock a new data item only if it has not yet unlocked any data item, is called
- Two-phase unlocking protocol
- One-phase locking protocol
- Two-phase locking protocol
- One-phase unlocking protocol
C
MCQ: The first part, which is the upper half of the rectangle, contains the name of
- All attributes
- Entity set
- Schema
- Domain
B
MCQ: The aggregate function that returns the number of the elements in the collection is known as
- total
- count
- whole
- combine
B
MCQ: The rolling back of any transaction takes place at the stage of
- Partially committed
- Aborted
- Active
- Committed
B