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Quiz on Entity Relationship Diagrams PDF Download eBook
MCQ: In E-R diagrams, the discriminator of a strong entity is underlined with a
- Double line
- Dashed line
- Solid line
- No line
C
MCQ: For the long-term online storage of data, the primary medium of storage is
- Optical storage
- Cache
- Magnetic-disk storage
- Flash memory
C
MCQ: Each transaction is a unit of
- Consistency
- Atomicity
- Durability
- Both A and B
D
MCQ: If the sort order of a search key is similar to the sort order of a relation, the search key of the index is called
- Clustering index
- Primary index
- Secondary index
- Composite index
A
MCQ: The movement of data to and from disk relative to the speed of the central processing unit, is
- High
- Very High
- Slow
- Very Slow
C