Database Systems - Section 2 Multiple Questions and Answers.




16.The operation of projection is a:
A. Dimensional operations
B. Multidimensional operations
C. Unary operations
D. Binary operations

17.The projection that allows extension of operations, i.e. arithmetic and string functions to be used in the projection list, is known as?
A. Embedded Projection
B. Extended Projection
C. Generalized Projection
D. Aggregation Projection

18. The relational Algebra is a ____________ Query language.?
A. Structured
B. Procedural
C. Logical
D. Relational

19.Which of the following are the fundamental operations in the Relational Algebra?
A. Select and Project
B. Project and Cartesian product
C. Union and set Difference
D. All of the Above

20.The select, project and rename operations are called____?
A. Binary operations
B. Ternary Operations
C. Unary operations
D. None of the above.

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