9 Questions
What is an example of Data Inconsistency?
Different values for the same attribute
Data redundancy is a problem that occurs when data is stored in a single file.
False
What is the problem with traditional file environments in terms of data sharing?
Lack of data sharing and availability
Data redundancy occurs when there is ______________________ data in multiple files.
duplicate
Which of the following is a security concern in traditional file environments?
Poor security
Data inconsistency is a result of data redundancy.
False
What is the consequence of poor security in traditional file environments?
Unauthorized access to data
In traditional file environments, data is often stored in multiple files, leading to ______________________.
data redundancy
Match the following terms with their definitions:
Data Redundancy = Duplicate data in multiple files Data Inconsistency = Different values for the same attribute Poor Security = Unauthorized access to data Lack of Data Sharing and Availability = Difficulty in accessing and sharing data
Study Notes
Problems With the Traditional File Environment
- Data redundancy: duplicate data in multiple files
- Inconsistency: same data stored in more than one place, different values for the same attribute
- Program-data dependence: coupling of data stored in files and specific programs, changes in programs require changes to data
- Lack of flexibility: information cannot flow freely across functional areas
- Poor security: users may distrust systems with inconsistent data values, high costs for implementing changes
- Lack of data sharing and availability: difficulty in sharing or accessing information timely
Understanding Records, Entities, and Attributes
- Record: describes an entity
- Entity: a person, place, thing, or event on which information is stored and maintained
- Attribute: a characteristic or quality describing a particular entity
- Example: entity COURSE, attributes: Student_ID, Course, Date, Grade
- Specific values that attributes can have are found in the fields of the record describing the entity
Database Management System
- A single human resources database provides many different views of data, depending on the information requirements of the user
- Example: Coding Confusion - different coding systems for the same attribute, e.g., clothing size represented as "extra-large" vs. "XL"
This quiz assesses your understanding of the limitations of traditional file environments, including data redundancy, inconsistency, and lack of flexibility. It covers concepts related to Management Information Systems (MIS).
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