Multiple choice review questions. Please select the best answer for each question.
1. All of the following are rules for preparing DFDs except:
a. No process can have only inputs.
b. A DFD can never have more than seven processes.
c. External entities and data stores have noun phrase labels.
d. A data flow can go directly into a data store.
2. How many context diagrams are in a properly prepared leveled set of DFDs?
a. One, with its process numbered 0
b. One, with its processes numbered 1.0, 2.0 and so on
c. No more than seven
d. As many as the preparer thinks necessary.
3. What term is used to describe the relationship between levels in a set of DFDs?
a. Primitive
b. Decomposed
c. Context
d. Balanced
4. Every ___ in a database table must be uniquely identified with a ___.
a. field, primary key
b. primary key, field
c. record, primary key
d. primary key, record
5. The process of making a relational database efficient and easy to use is called:
a. Normalizing.
b. Balancing.
c. Leveling.
d. Combining.
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