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Quiz # 2 Dec 11 to 12, 2014

Here goes my 2nd Quiz

By Juste

Verify all answers yourself. 

Please share your quizzes as well.

 

Which of the following tool is used to design conceptual database design?
SQL
MS Access
Oracle
*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.
Strong
*weak
business
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
DFD
None

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?
Abstraction
Encapsulation
*Inheritance
Dependencies

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;
*Union
Decomposition
Augmentation
Reflexivity

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

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