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Questions and Answers
What is the primary purpose of a database?
What is the primary purpose of a database?
Which term describes the place where metadata for a particular database is stored?
Which term describes the place where metadata for a particular database is stored?
What type of data does unstructured data refer to?
What type of data does unstructured data refer to?
In the context of a Database Management System (DBMS), what does metadata refer to?
In the context of a Database Management System (DBMS), what does metadata refer to?
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What is the disadvantage of a file processing system called 'Program-Data Dependence'?
What is the disadvantage of a file processing system called 'Program-Data Dependence'?
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Which term best describes data that has been processed to increase knowledge?
Which term best describes data that has been processed to increase knowledge?
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What is the main purpose of primary and foreign keys in a relational database?
What is the main purpose of primary and foreign keys in a relational database?
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Which component of the database environment is responsible for designing the structure of the database at a conceptual level?
Which component of the database environment is responsible for designing the structure of the database at a conceptual level?
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In the database development process, what does the logical database design phase primarily focus on?
In the database development process, what does the logical database design phase primarily focus on?
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Which type of architecture involves a client communicating with a server to retrieve data from a database in a network environment?
Which type of architecture involves a client communicating with a server to retrieve data from a database in a network environment?
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What is a common application area for database technology based on the information provided?
What is a common application area for database technology based on the information provided?
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What is the primary disadvantage of a file processing system?
What is the primary disadvantage of a file processing system?
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Which of the following is NOT an advantage of the database approach mentioned?
Which of the following is NOT an advantage of the database approach mentioned?
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What does a Database Management System (DBMS) do in the database approach?
What does a Database Management System (DBMS) do in the database approach?
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What is one of the elements of the database approach mentioned in the text?
What is one of the elements of the database approach mentioned in the text?
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Which aspect of a file processing system leads to 80% of information systems budget being spent according to the text?
Which aspect of a file processing system leads to 80% of information systems budget being spent according to the text?
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Why is program-data independence considered an advantage of the database approach?
Why is program-data independence considered an advantage of the database approach?
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Study Notes
Database Management System
- A database is an organized collection of logically related data.
- Data is a stored representation of meaningful objects and events, which can be structured (numbers, text, dates) or unstructured (images, video, documents).
Information and Metadata
- Information is data processed to increase knowledge in the person using the data.
- Metadata is data about data, which includes characteristics describing the attributes of an entity, such as name, data type, size, and format.
Repository and Data Dictionary
- A repository is the place where all metadata for a particular database is stored.
- A data dictionary is a repository that may also include information on relationships between files or tables in a particular database.
File Processing System
- A file processing system is a collection of files and programs that access and modify these files.
- Disadvantages of file processing systems include program-data dependence, duplication of data, limited data sharing, and lengthy development times.
Elements of Database Approach
- Relational databases involve tables (relations) representing entities and primary/foreign keys representing relationships.
- Use of internet technologies, networks, and telecommunications, distributed database, client-server, and 3-tier architectures are also part of the database approach.
Components of the Database Environment
- Components of the database environment include CASE tools, repository, database management system, database application programs, user interface, data/database administrators, system developers, and end users.
Database Development Process
- The database development process consists of 7 steps: planning, analysis, design, implementation, maintenance, and enterprise modeling.
Sample Database Applications
- Examples of database applications include banking, airlines, universities, sales, online retailers, manufacturing, human resources, and telecommunication.
Advantages of Database Approach
- Advantages of the database approach include program-data independence, separate data descriptions, planned data redundancy, improved data consistency, improved data sharing, increased productivity, and enforcement of standards.
- Additionally, the database approach provides improved data quality, improved data accessibility, reduced program maintenance, and improved decision support.
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Description
Test your knowledge of key terms and concepts in the field of database management system, including database, data, structured data, unstructured data, and information processing.
