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Quiz on Relational Algebra PDF Download eBook
MCQ: The relational-algebra operations can be grouped together into a
- relational-algebra query
- relational-algebra operation
- relational-algebra expression
- relational-algebra function
C
MCQ: The practice of generalization is a simple inversion of
- Inheritance
- Dependency
- Specialization
- Relationships
C
MCQ: In A4 search, if only one record is retrieved, the time cost calculated will be same as that for
- A1
- A2
- A3
- A5
B
MCQ: A cross-tabulation table is different from
- Relational tables
- Irrelational tables
- Query tables
- Structured tables
A
MCQ: Some implementations of SQL also allow us to test whether the result of a comparison is unknown, by the clauses
- Is unknown
- Unknown
- Is not unknown
- Both A and C
D