True or False: Business is a system where management decisions are influenced by or have an influence on suppliers, customers, and society as a whole.
A.True
B.False
True or False: Wireless computing devices, such as smartphones and tablets, are not subject to computer viruses and malware.
A.True
B.False
Which of the following is NOT a component of a Data Flow Diagram (DFD)?
A.Dataflow
B.Datastore
C.External entities
D.Relationship between external entities
The Entity-Relationship (ER) model is primarily designed to ________.
A.be close to a user's perception of the data
B.replace relational database design entirely
C.enable low-level physical disk storage descriptions of data
D.directly implement database physical storage structures
In an Entity-Relationship (ER) diagram, what does a many-to-many (M:N) cardinality between STUDENT and COURSE entities signify?
A.It indicates that many students can attend many courses
B.It indicates that there is a missing entity in the schema
C.It indicates that a student can attend at most one course
D.It indicates that students are required to attend more than one course
In an Entity-Relationship (ER) model, how is an entity type defined?
A.A collection or set of entities that share the same attributes and structure
B.Defined only when the database is actually constructed in physical storage
C.A single specific instance of a record in a relational database table
D.A relationship link connecting two independent attributes
Which of the following statements best describes the primary function of an Entity-Relationship (ER) model?
A.It provides a high-level conceptual representation of real-world enterprise data, entities, and their relationships
B.It defines low-level physical storage structures and file access paths on disk
C.It generates SQL DML application code automatically for user interfaces
D.It enforces database transaction concurrency control and isolation levels
Which of the following statements accurately describes the relationship between an Entity-Relationship (ER) model and physical database implementation?
A.An ER model provides a view of the logic of the data and not the physical implementation
B.An ER model is concerned primarily with a logical view of the data and secondly with the physical implementation
C.An ER model is concerned primarily with a physical implementation of the data and secondly with the logical view
D.An ER model is entirely concerned with modeling the physical implementation
What core structural elements are modeled by the Entity-Relationship (ER) Model?
A.Entities and Relationships
B.Entities, Relationships and Processes
C.Relationships only
D.Entities only
In an Entity-Relationship (ER) model, an entity is best defined as ________.
A.any real-world object, concept, or physical thing that exists and is distinguishable from other objects
B.a specific attribute or column definition inside a relational database table
C.a graphical connector representing data flows between processes
D.a physical file block stored on disk
