Database Systems Practice Test 242
Modification of Database MCQs (Multiple Choice Questions) PDF Download - 242
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Modification of Database MCQ with Answers PDF Download: Quiz 242
To insert data into a relation, we specify a tuple to be
- Retrieved
- Processed
- Tested
- Inserted
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
The first part, which is the upper half of the rectangle, contains the name of
- All attributes
- Entity set
- Schema
- Domain
The aggregate function that returns the number of the elements in the collection is known as
- total
- count
- whole
- combine
The rolling back of any transaction takes place at the stage of
- Partially committed
- Aborted
- Active
- Committed
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Modification of Database Practice Tests
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