Entity Relationship Diagrams and Data Modeling Quiz

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Which of the following diagrams represents the logical elements of a system but does not depict the physical system?

System flowchart

Program flowchart

Entity relationship (ER) diagram

Data flow diagram (DFD) (correct)

What is the purpose of an entity relationship (ER) diagram?

To represent the relationship between business entities (correct)

To depict the physical components of a system

To document the data flows in a system

To model the processes of a system

What does the term 'cardinality' refer to in the context of entity relationship diagrams?

The type of relationship between entities

The degree of complexity of the diagram

The number of entities in the diagram

The numeric mapping between entities (correct)

Which of the following statements is true about data flow diagrams (DFDs) and entity relationship (ER) diagrams?

DFDs model system processes, while ER diagrams model system data Signup and view all the answers

Which version of the entity relationship (ER) model is widely used in accounting information systems (AIS)?

The REA model Signup and view all the answers

Which of the following is NOT a component represented in a data flow diagram (DFD)?

Entity Relationship Diagrams Signup and view all the answers

What is the purpose of a data model in the context of database design?

To serve as a blueprint for the physical database Signup and view all the answers

In an entity relationship (ER) diagram, the cardinality of a relationship between two entities indicates the:

Minimum and maximum number of instances of one entity that can be associated with each instance of the other entity Signup and view all the answers

Which of the following documentation techniques uses symbols to represent the flow of data and control through a system?

Data Flow Diagram Signup and view all the answers

The REA (Resources, Events, Agents) model is a conceptual framework for modeling:

Business processes and accounting information systems Signup and view all the answers

Which of the following is a problem associated with the flat-file approach to data management?

Increased data redundancy Signup and view all the answers

Which of the following is NOT a benefit of using digital record audit trails compared to hard-copy document audit trails?

More transparent Signup and view all the answers

What do resources, events, and agents represent in the REA model?

Data entities Signup and view all the answers

In the context of ER diagrams, what does cardinality refer to?

Numerical mapping between entities Signup and view all the answers

How is a DFD different from an ER diagram?

ER diagram models data and DFD models processes Signup and view all the answers

Which documentation technique reveals the internal structure of digital records in a database table?

Record layout diagrams Signup and view all the answers

What does the CARDINALITY term 'one-to-many' signify in an ER diagram?

Each entity is connected to many entities of another type Signup and view all the answers

What does a Document flowchart represent if a manual system is involved?

Processing of a single transaction Signup and view all the answers