cs403 first solved quiz on 14 November, 2011

[Xpert]

Each table must have a ____ key.
Primary
Secondary
Logical
Foreign
Which model operates at the lowest level of abstraction?
Internal

Data about data is metadata
True
False
In a three-level DBMS architecture, the ______ level interacts directly with the users.
External
Data inconsistency leads to a number of problems such as
loss of information and incorrect results
less secure data
redundant data
Slow database development
Which of the following is NOT a component of a DFD?
Relationship between external entities

External entities
Datastore
Dataflow
Level of data at which entities or objects exist in reality is called
Real world data
Schema for real world data
Meta data
Data about data
Which of the following is INCORRECT statement concerning the database design process?
During requirements collection and analysis phase, one can gather the data requirements of database users.
Which one of the following is NOT a characteristic of meta data?


An instance is
a particular occurance of an entity
a special type of relation
an attribute of an entity
any particular entity