Data Management Foundations WGU C175
Exam Questions and Answers (2026/2027)
| Exam Prep Material | Verified Questions &
Answers | A+
• Data. CORRECT ANSWER: Facts gathered together for analysis
• 1640-Blaise Pascal. CORRECT ANSWER: adding machine similar to odometer
• 1805-Joseph Marie Jacquard. CORRECT ANSWER: punch card for textile weaving
patterns (Loom)
• 1833-Charles Babbage. CORRECT ANSWER: loom records patterns in punch cards
• 1890-Herman Hollerith. CORRECT ANSWER: tabulator/sorter punch cards Amercian
census-ABM
• 1911-James Powers. CORRECT ANSWER: automatic feeders Powers tabulators
machine comp>UNIVAC>UnisysCorp
• 1930's. CORRECT ANSWER: Erasable magnetic tape for storage
• 1940's. CORRECT ANSWER: magnetic drum's begin prototype
• Flat Files. CORRECT ANSWER: A file having no internal hierarchy
• Hashed Files. CORRECT ANSWER: A file that has been encrypted for security
purposes
• Heap Files. CORRECT ANSWER: An unsorted set of records
• Information. CORRECT ANSWER: The transformation of raw data into useful facts
• indexed-sequential file. CORRECT ANSWER: an index built over a field
• Punch Card. CORRECT ANSWER: A card that is perforated and can hold commands
or data
• Structured Data. CORRECT ANSWER: Information with a high degree of organization,
organized in rows and columns
, • Unstructured Data. CORRECT ANSWER: Information that does not have structure
(such as text) cannot be stored in rows and text such as email, sticky notes, business
cards IM's...
• Big Data. CORRECT ANSWER: structured and unstructured data, large amount of
data to handle
• Digital Data. CORRECT ANSWER: stored as strips of binary numbers
• Binary relationship. CORRECT ANSWER: It is a relationship between two entity types.
(simplest relationship)
• Cardinality. CORRECT ANSWER: (Means Count) It is the maximum number of
entities that can be involved in a particular relationship ie: one-one, one-many, many-
many (Closest to entity cannot be zero, crows foot)
• E-R Model (entity-relationship). CORRECT ANSWER: It is well named, as it diagrams
entities (together with their attributes) and the relationships among them
• Intersection data. CORRECT ANSWER: It is a data that describes a many-to-many
relationship.
• Modality. CORRECT ANSWER: It is a minimum number of entity occurrences that can
be involved in a relationship. (farthest from entity can be zero)
• One-to-One Binary Relationship. CORRECT ANSWER: It means that a single
occurrence of one entity type can be associated with a single occurrence of the other
entity type and vice versa.
• Simple Linear Index. CORRECT ANSWER: very close in structure to the index in the
back of a book.
• Ternary relationship. CORRECT ANSWER: A relationship that involves three different
entity types.
• Unary relationship. CORRECT ANSWER: It is an associate occurrence of an entity
type with other occurrences of the same entity type.
• Unique identifier. CORRECT ANSWER: It is used to uniquely identify each record in a
database table.
• Referential Integrity. CORRECT ANSWER: trying to refer data in one relation in the
DB, data staying the same across tables when you insert/update/delete
• Attribute. CORRECT ANSWER: a property of, a characteristic of, or a fact that we
know about an entity
Exam Questions and Answers (2026/2027)
| Exam Prep Material | Verified Questions &
Answers | A+
• Data. CORRECT ANSWER: Facts gathered together for analysis
• 1640-Blaise Pascal. CORRECT ANSWER: adding machine similar to odometer
• 1805-Joseph Marie Jacquard. CORRECT ANSWER: punch card for textile weaving
patterns (Loom)
• 1833-Charles Babbage. CORRECT ANSWER: loom records patterns in punch cards
• 1890-Herman Hollerith. CORRECT ANSWER: tabulator/sorter punch cards Amercian
census-ABM
• 1911-James Powers. CORRECT ANSWER: automatic feeders Powers tabulators
machine comp>UNIVAC>UnisysCorp
• 1930's. CORRECT ANSWER: Erasable magnetic tape for storage
• 1940's. CORRECT ANSWER: magnetic drum's begin prototype
• Flat Files. CORRECT ANSWER: A file having no internal hierarchy
• Hashed Files. CORRECT ANSWER: A file that has been encrypted for security
purposes
• Heap Files. CORRECT ANSWER: An unsorted set of records
• Information. CORRECT ANSWER: The transformation of raw data into useful facts
• indexed-sequential file. CORRECT ANSWER: an index built over a field
• Punch Card. CORRECT ANSWER: A card that is perforated and can hold commands
or data
• Structured Data. CORRECT ANSWER: Information with a high degree of organization,
organized in rows and columns
, • Unstructured Data. CORRECT ANSWER: Information that does not have structure
(such as text) cannot be stored in rows and text such as email, sticky notes, business
cards IM's...
• Big Data. CORRECT ANSWER: structured and unstructured data, large amount of
data to handle
• Digital Data. CORRECT ANSWER: stored as strips of binary numbers
• Binary relationship. CORRECT ANSWER: It is a relationship between two entity types.
(simplest relationship)
• Cardinality. CORRECT ANSWER: (Means Count) It is the maximum number of
entities that can be involved in a particular relationship ie: one-one, one-many, many-
many (Closest to entity cannot be zero, crows foot)
• E-R Model (entity-relationship). CORRECT ANSWER: It is well named, as it diagrams
entities (together with their attributes) and the relationships among them
• Intersection data. CORRECT ANSWER: It is a data that describes a many-to-many
relationship.
• Modality. CORRECT ANSWER: It is a minimum number of entity occurrences that can
be involved in a relationship. (farthest from entity can be zero)
• One-to-One Binary Relationship. CORRECT ANSWER: It means that a single
occurrence of one entity type can be associated with a single occurrence of the other
entity type and vice versa.
• Simple Linear Index. CORRECT ANSWER: very close in structure to the index in the
back of a book.
• Ternary relationship. CORRECT ANSWER: A relationship that involves three different
entity types.
• Unary relationship. CORRECT ANSWER: It is an associate occurrence of an entity
type with other occurrences of the same entity type.
• Unique identifier. CORRECT ANSWER: It is used to uniquely identify each record in a
database table.
• Referential Integrity. CORRECT ANSWER: trying to refer data in one relation in the
DB, data staying the same across tables when you insert/update/delete
• Attribute. CORRECT ANSWER: a property of, a characteristic of, or a fact that we
know about an entity
