Download Chapter 11 PowerPoint Question Solution Describe the five logical

Chapter 11 PowerPoint Question Solution
1. Describe the five logical data groups or categories.
Logical view – data is organized into groups or categories: character, field, record, table and database.
Character– basic logical data element; a single letter, number, or special character such as a punctuation
mark. Field– next higher level; group of related characters; Last Name for example; a data field
represents an attribute. Record – a collection of related fields; a collection of attributes. Table – a
collection of related records. Database – is an integrated collection of logically related tables.
2. What is the difference between batch processing and real-time processing?
Batch processing – data collected and stored over time, several hours, days, or even weeks, and then
processed at once as a “batch”. Real-time processing happens “now” instead of “later”.
3. Identify and define the five parts of DBMS programs.
Database management systems (DBMS) – software that enables users to create, modify, and gain access
to data. Five common data models: Hierarchical database, Network database, Relational database,
Multidimensional database and Object-oriented database. Hierarchical- Data structured in nodes
organized like an upside-down tree; each parent node can have several children; each child node can
have only one parent. Network- Like hierarchical except that each child can have several parents.
Relational- Data stored in tables consisting of rows and columns. Multi-dimensional- Data stored in data
cubes with three or more dimensions. Object- oriented- Organizes data using classes, objects, attributes,
and methods.
4. Describe each of the five common database models.
Individual: Integrated files used by just one person. Company: Common operational or commonly used
files shared in an organization. Distributed: Database spread geographically and accessed using database
server. Commercial: Information utilities and data banks available.
5. What are some of the benefits and limitations of databases? Why is security a concern?
Strategic uses: Data warehouse and data mining. Security: Databases are valuable and protection
necessary.