AIS ACG 4401 Exam 2 Questions & Answers 2024/2025
Conceptual model - ANSWERSdepicts important objects and relationships between objects that must be captured in a database.
REA Communication methods - ANSWERS1. Narrative Description
2. Diagrams with various notations
3. Structured Grammar...
Conceptual model - ANSWERSdepicts important objects and relationships between objects that must be
captured in a database.
REA Communication methods - ANSWERS1. Narrative Description
2. Diagrams with various notations
3. Structured Grammar
4. Predicate logic notation
5. Tags: XML XBRL
6. Programming Language notation
Unified Modeling Language (UML) - ANSWERSA standard format for communicating and documenting
software design.
Uses diagrams for different analysis levels.
Logical Model - ANSWERSShows what a system must do, regardless of how it will be implemented
physically.
independent software, convert conceptual model.
Physical database - ANSWERScreated based on specific database software packages, database is
implemented and dependent on software.
Entity - ANSWERSreal world object with separate existence
Class - ANSWERSentities with shared characteristics
Association - ANSWERSRelationship between classes
, Association Class - ANSWERSrepresents a relationship in which there can be only one link between the
related entities
Reified association - ANSWERSa relationship in which there can be multiple links between the related
entities
Attribute - ANSWERScharacteristic possessed by a class or association
Primary Key Attribute - ANSWERSused to uniquely and universally describe each instance of a class or
association class
Concatenated primary key - ANSWERSa unique and universal identifier for a class or association class
that is made up of multiple attributes
Simple attribute - ANSWERSAn attribute that cannot be subdivided into meaningful components.
composite Attributes - ANSWERScan be divided into smaller subparts, which represent more basic
attributes that have their own meanings
Derivable attribute - ANSWERSa characteristic of a class or an association class that can be calculated
based on the values of other stored characteristics
Static derivable attribute - ANSWERSa derivable attribute for which the derived value will not change if
additional transaction data is entered into the database
volatile derivable attribute - ANSWERSa derivable attribute for which the derived value will change if
additional transaction data is entered into the database
minimum multiplicity - ANSWERSrepresents the minimum number of times an instance of a class must
participate in an association with instances of a related class; legal values are 0 and 1
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