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26. The conceptual model is
Dependent on hardware.
Dependent on software.
Dependent on both hardware and software.
Independent of both hardware and software
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27. What is a relationship called when it is maintained between two entities?
Unary
Binary
Ternary
Quaternary
28. Which of the following operation is used if we are interested in only certain columns of a table?
PROJECTION
SELECTION
UNION
JOIN
29. The RDBMS terminology for a row is
Tuple
Relation
Attribute
Degree
30. Which of the following is an advantage of view?
Data security
Derived columns
Hiding of complex queries
All of the above
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