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Questions and Answers
What is the main difference between data and information?
What is the main difference between data and information?
- Data cannot be stored, whereas information can.
- Data is always numerical, while information is textual.
- Data is organized, while information is not.
- Information consists of logically related data pieces. (correct)
Which of the following best describes a database management system (DBMS)?
Which of the following best describes a database management system (DBMS)?
- A software application that manages databases. (correct)
- A type of hardware for processing data.
- A system that merely stores files.
- An interface for displaying information only.
What is one advantage of using a DBMS?
What is one advantage of using a DBMS?
- It removes data redundancy and inconsistency. (correct)
- It complicates access to data.
- It increases data storage costs significantly.
- It limits user accessibility.
Which of the following is NOT an application area of a database system?
Which of the following is NOT an application area of a database system?
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In a relational database, what is the purpose of a key?
In a relational database, what is the purpose of a key?
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Which of the following is an example of data?
Which of the following is an example of data?
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What does it mean to create a table in MS-Access?
What does it mean to create a table in MS-Access?
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Which of the following components typically does NOT belong to a DBMS?
Which of the following components typically does NOT belong to a DBMS?
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Study Notes
Objectives of RDBMS Study
- Understand the distinction between data (individual facts) and information (meaning derived from data).
- Differentiate between a database (structured data storage) and a Database Management System (DBMS) (software for managing databases).
- Recognize the necessity and benefits of using a DBMS, including efficiency, data integrity, and security.
- Identify various application areas for database systems, such as finance, healthcare, and social media.
- Comprehend key concepts of relational database management systems (RDBMS) and their use in organizing data logically.
- Familiarize with essential database terminology: tables (data structure), keys (unique identifiers), and queries (requests for data).
- Gain practical skills by creating a table in Microsoft Access.
Understanding Data and Information
- Data refers to raw facts or values that lack context or meaning when considered individually.
- Information emerges when logically related data pieces are organized, providing clear context and significance.
- Example of data: a flight number. Example of information: a complete set of details about a flight including flight number, date, time, departure, arrival, and fare.
Example of Data Forming Information
- A structured table illustrates how various elements combine into meaningful information:
- Flight Number: Unique identifier for each flight.
- Sector: Departure and arrival locations.
- Flight Date: Scheduled date for the flight.
- Departure and Arrival Times: Specific times indicating travel schedule.
- Fare: Cost of the ticket for the flight.
- Sample data entry from the table:
- Flight A11917 – From Mumbai to Delhi on 12-01-2023, departing at 19:45 and arriving at 21:30, with a fare of 8,910.00.
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