information system
In all information systems, data resources must be organized and structured in some logical manner, so that they can be: D. All of the choices are correct.
From a logical point of view, a(n) _______________ is the smallest data element that can be observed and manipulated. A. character
A record represents a collection of _______________ that describe an entity.
D. attributes
All the fields used to describe the attributes of an entity are grouped to form a(n) _______________. B. record
A group of related records is a data file, or a _______________. C. table
Variable-length records contain: A. both a variable number of fields and variable field lengths.
Fixed-length records contain: D. both a fixed number of fields and fixed field lengths.
When independent of any other files related to it, a single table is referred to as a(n):
B. Flat file
A(n) _______________ is an integrated collection of logically related data elements. C. database
Databases contain data elements that describe both entities and the _______________ among entities. A. relationships
Database management packages based on the _______________ model can link data elements from various tables to provide information to users. B. relational
Early mainframe DBMS packages used the _______________ structure, in which all records are dependent and arranged in multilevel structures, consisting of one root record and any number of subordinate levels. C. hierarchical In a(n) _______________ database structure, all of the relationships among records are one-to-many, because each data element is related to only one element above it. A. hierarchical Which database model allows many-to-many relationships among records so that a data element can be accessed by following one of several paths?
B. Network The _______________ model is the most widely used database structure today. C. relational In the
From a logical point of view, a(n) _______________ is the smallest data element that can be observed and manipulated. A. character
A record represents a collection of _______________ that describe an entity.
D. attributes
All the fields used to describe the attributes of an entity are grouped to form a(n) _______________. B. record
A group of related records is a data file, or a _______________. C. table
Variable-length records contain: A. both a variable number of fields and variable field lengths.
Fixed-length records contain: D. both a fixed number of fields and fixed field lengths.
When independent of any other files related to it, a single table is referred to as a(n):
B. Flat file
A(n) _______________ is an integrated collection of logically related data elements. C. database
Databases contain data elements that describe both entities and the _______________ among entities. A. relationships
Database management packages based on the _______________ model can link data elements from various tables to provide information to users. B. relational
Early mainframe DBMS packages used the _______________ structure, in which all records are dependent and arranged in multilevel structures, consisting of one root record and any number of subordinate levels. C. hierarchical In a(n) _______________ database structure, all of the relationships among records are one-to-many, because each data element is related to only one element above it. A. hierarchical Which database model allows many-to-many relationships among records so that a data element can be accessed by following one of several paths?
B. Network The _______________ model is the most widely used database structure today. C. relational In the