Cs430 Exam Practice Questions and
Answers
A relationship in a database is which of the following? - Ans:-An association between entities
T/F: Atomicity refers to the requirements that either all of a transaction must occur or none of it. -
Ans:-True
T/F: The person that has central control ove...
We must ensure the data is restored to a consistent state if the system cashes while changes are being
made.
T/F: It is not possible for several attributes to have the same domain, we require they be unique. -
Ans:✔✔-False
A ___________________ is a minimal superkey. - Ans:✔✔-Candidate key
T/F: Relational Algebra is a non-procedural query language. - Ans:✔✔-False
T/F: For each attribute, there is a set of permitted values called the domain or the value set. - Ans:✔✔-
True
The logical design of the database is called which of the following? - Ans:✔✔-Database schema
T/F: The schema of a relation changes when tuples are added to the database. - Ans:✔✔-False
T/F: The order of how a tuple appears in a relations is extremely important as that is what determines
the primary key. - Ans:✔✔-False
An instance of a relation is which of the following: - Ans:✔✔-A set of tuples, also called records, in which
each tuple has the same number of fields as the relation schema.
A domain is _____________________ if the elements of the domain are considered to be indivisible
units. - Ans:✔✔-Atomic
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