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Quiz # 2 Dec 11 to 12, 2014

Here goes my 2nd Quiz

By Juste

Verify all answers yourself. 

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Which of the following tool is used to design conceptual database design?
MS Access
*This model is independent of any tool

A ____ entity has a primary key that is partially or totally derived from the parent entity in the relationship.

A patient can be an outdoor or indoor. Analyze this statement and tell what type of constraint will be applied on patient?
Total completeness
*Partial Completeness
Total Disjoint
Partial Disjoint

Which of the following might be represented with a single-valued attribute?
person's phone number
car's color
employee's educational background
*computer's processor speed

Which tool is used to identify relationship between entities?
Cross Reference Matrix
*Sub-type discriminator

Relational Calculus is a _____________ relational data manipulation language.
Procedural, Informal
Non-Procedural, Informal
*Procedural, Formal
Non-Procedural, Formal

Which of the following provides us the facility to add properties of one entity to another entity automatically?

Identify the INCORRECT statement.

Relational data model is based on mathematics
*In relational data model there is no manipulation language defined
Relational data model is simple
We can test mathematically anything before using it in RDM and it will work fine

If A -> B and A -> C, then A -> BC The Inference Rule applies is;

Unary operations involves
*Only one relation
Only two relations
More than two relations
Not more than five relations

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