QUESTIONS AND SOLUTIONS GRADED A+
●● Attribute.
Answer: is a characteristic or property of an entity. For the entity
employee, for example, attributes might include such characteristics as
first and last name, employee number, and date of hire. seen as a column
in an entity table
●● Big Data.
Answer: the large volume of data produced by every digital process,
system, sensor, mobile device, and even social media exchange. to
extract meaningful data from big data, need optimal processing power,
analytics capabilities, and up-to-date technical skills. Data can be
structured, unstructured or a combo of both
●● Column.
Answer: also called a field or attribute
●● data analyst.
Answer: use tools and algorithms to mine a database for answers,
information, trends, and insights.
●● data file.
, Answer: A spreadsheet that is used to store data, typically stores data as
one large table
●● data independence.
Answer: a quality that allows you to change the structure of a database
without requiring major changes to the programs that access the
database
●● data redundancy.
Answer: the duplication of data, or the storing of the same data in more
than one place. Can lead to a higher frequency of data errors and
inconsistencies, which can lead to poorer decision making. one problem
that employees have with the project estimates spreadsheet
●● data security.
Answer: is protection of data from threats and includes preventing
unauthorized access to the database, encrypting data as it travels through
a network, protecting against data corruption, and protecting against all
other electronic and physical attacks to the data.
●● database.
Answer: a collection of data organized in a manner that allows access,
retrieval, and use of that data.
●● database administrator (DBA).