Computer Database MCQs

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Q: ;Conceptual design ?

A. Is a documentation technique.
B. Needs data volume and processing frequencies to determine the size of the database.
C. Involves modelling independent of the DBMS
D. Is designing the relational model.


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Q: The relational model feature is that there ?

A. Is no need for primary key data
B. Is much more data independence than some other database models
C. Are explicit relationships among records
D. Are tables with many dimensions


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Q: A relational database developer refers to a record as ?

A. A criteria.
B. A relation.
C. A tuple.
D. An attribute.


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Q: The property / properties of a database is / are : ?

A. It is an integrated collection of logically related records.
B. It consolidates separate files into a common pool of data records.
C. Data stored in a database is independent of the application programs using it
D. All of the above


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Q: A report generator is used to ?

A. Update files.
B. Print files on paper
C. Data entry.
D. Delete files.


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Q: The way a particular application views the data from the database that the application ;uses is a ?

A. Module.
B. Relational model.
C. Schema.
D. Sub schema.


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Q: The database environment has all of the following components except: ?

A. Users.
B. Separate files
C. Database.
D. Database administrator


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Q: Related fields in a database are grouped to form a ?

A. Data file
B. Data record.
C. Menu.
D. Bank.


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Q: ;A logical schema ?

A. Is the entire database.
B. describe data in terms of relational tables and columns, object-oriented classes, and XML tags.
C. Describes how data is actually stored on disk.
D. Both (A) and (C)


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Q: In tuple relational calculus P1 → P2 is equivalent to ?

A. ¬ P1  ∨ P2
B. P1 ∨ P2
C. P1  ∧ P2
D. P1  ∧ ¬P2


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