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Data Management – Applications Questions and Correct Answers Latest Update, Graded A+
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In a relational model, _______ are also used to establish relationships among tables and to ensure the integrity of the data. o :## keys A _____ key can be described as a minimal superkey, a superkey without any unnecessary attributes. o :## candidate A _____ key is defined as a key that ...

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  • August 22, 2024
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  • 2024/2025
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1|Page : 2024 | Grade A+




Data Management – Applications
Questions and Correct Answers
Latest Update, Graded A+

In a relational model, _______

are also used to establish relationships among tables and to ensure the integrity of

the data.

o :## keys



A _____ key can be described as a minimal superkey, a superkey without any

unnecessary attributes.

o :## candidate



A _____ key is defined as a key that is used strictly for data retrieval purposes.

o :## secondary



_____ logic, used extensively in mathematics, provides a framework in which an

assertion (statement of fact) can be verified as either true or false.

o :## Predicate



_____, also known as RESTRICT, yields values for all rows found in a table that

satisfy a given condition.




Master01: DO NOT COPY AND PASTE!! August 22, 2024 Latest Update

,2|Page : 2024 | Grade A+


o :## Select



Product yields all possible pairs of rows from two tables, also known as the

_________

product.

o :## Cartesian



Proper use of ________ keys is crucial to controlling data redundancy

o :## foreign



A primary key is a(n) ______________

key chosen to be the primary means by which rows of a table are uniquely

identified.

o :## candidate



A _____ is the primary key of one table that has been placed into another table to

create a common attribute.

o :## foreign key



The relational operators have the property of ___________

; that is, the use of relational algebra operators on existing relations (tables)

produces new relations.

o :## closure




Master01: DO NOT COPY AND PASTE!! August 22, 2024 Latest Update

, 3|Page : 2024 | Grade A+


In a database context, a(n) _____ indicates the use of different names to describe

the same attribute.

o :## synonym



_____ relationships cannot be implemented as such in the relational model.

o :## M:N



A(n) _____________________ provides a detailed description of all tables found

within the user/designer-created database.

o :## data dictionary



To be considered minimally relational, the DBMS must support the key relational

operators _____, PROJECT, and JOIN.

o :## Select



A(n) _____ only returns matched records from the tables that are being joined.

o :## inner join



An index key can have multiple _________________

(a composite index).

o :## attributes



In the relational model, _____ are important because they are used to ensure that

each row in a table is uniquely identifiable.



Master01: DO NOT COPY AND PASTE!! August 22, 2024 Latest Update

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