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WGU-C175 Exam Questions & Answers 100% Correct
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1833-Charles Babbage - ANSWER-loom records patterns in punch cards 1890-Herman Hollerith - ANSWER-tabulator/sorter punch cards Amercian census-ABM 1911-James Powers - ANSWER-automatic feeders Powers tabulators machine comp>UNIVAC>UnisysCorp 1930's - ANSWER-Erasable magnetic tape for ...

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  • November 24, 2023
  • 11
  • 2023/2024
  • Exam (elaborations)
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  • wgu c175 exam questions answers 100 correct
  • wgu c175 exam questions answers stuvia
  • data answer facts gathered together for analysis

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WGU-C175 Exam Questions & Answers
100% Correct

Data - ANSWER-Facts gathered together for analysis

1640-Blaise Pascal - ANSWER-adding machine similar to odometer

1805-Joseph Marie Jacquard - ANSWER-punch card for textile weaving patterns
(Loom)

1833-Charles Babbage - ANSWER-loom records patterns in punch cards

1890-Herman Hollerith - ANSWER-tabulator/sorter punch cards Amercian census-ABM

1911-James Powers - ANSWER-automatic feeders Powers tabulators machine
comp>UNIVAC>UnisysCorp

1930's - ANSWER-Erasable magnetic tape for storage

1940's - ANSWER-magnetic drum's begin prototype

Flat Files - ANSWER-A file having no internal hierarchy

Hashed Files - ANSWER-A file that has been encrypted for security purposes

Heap Files - ANSWER-An unsorted set of records

Information - ANSWER-The transformation of raw data into useful facts

indexed-sequential file - ANSWER-an index built over a field

Punch Card - ANSWER-A card that is perforated and can hold commands or data

Structured Data - ANSWER-Information with a high degree of organization, organized in
rows and columns

Unstructured Data - 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 - ANSWER-structured and unstructured data, large amount of data to handle

, Digital Data - ANSWER-stored as strips of binary numbers

Binary relationship - ANSWER-It is a relationship between two entity types. (simplest
relationship)

Cardinality - 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) - ANSWER-It is well named, as it diagrams entities
(together with their attributes) and the relationships among them

Intersection data - ANSWER-It is a data that describes a many-to-many relationship.

Modality - 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 - 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 - ANSWER-very close in structure to the index in the back of a
book.

Ternary relationship - ANSWER-A relationship that involves three different entity types.

Unary relationship - ANSWER-It is an associate occurrence of an entity type with other
occurrences of the same entity type.

Unique identifier - ANSWER-It is used to uniquely identify each record in a database
table.

Referential Integrity - ANSWER-trying to refer data in one relation in the DB, data
staying the same across tables when you insert/update/delete

Attribute - ANSWER-a property of, a characteristic of, or a fact that we know about an
entity

B+ tree index - ANSWER-family tree organizational method better to insert/delete
records.
Each index record, at every level of the tree, contains space for the same number of key
value/pointer pairs. This index record capacity is arbitrary, but once it is set, it must be
the same for every index record at every level of the index.

Candidate key (alternate key) - ANSWER-If a relation has more than one attribute or
minimum group of attributes that represents a way of uniquely identifying the entities,

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