Podcast
Questions and Answers
What is data in computers composed of?
What is data in computers composed of?
What type of data contains alphabets and letters?
What type of data contains alphabets and letters?
What is the purpose of cleaning, organizing, and analyzing data?
What is the purpose of cleaning, organizing, and analyzing data?
What is a characteristic of good information?
What is a characteristic of good information?
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What is the difference between data and information?
What is the difference between data and information?
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What is the purpose of a record in a computer?
What is the purpose of a record in a computer?
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What is an example of a record?
What is an example of a record?
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What is the role of a data scientist?
What is the role of a data scientist?
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What is alphanumeric data?
What is alphanumeric data?
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What is the purpose of data?
What is the purpose of data?
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Study Notes
What is Data?
- Data is a representation of facts, concepts, or instructions suitable for communication, interpretation, or processing by a human or an electronic machine such as a computer.
- Data in computers comes from characters like alphabets, digits, or special characters.
Types of Data
- Text data: contains alphabets and letters (both lower case and upper case) and can include symbols, also referred to as alphabetic data.
- Numeric data: contains number digits, local decimal points, signs, and spaces.
- Alphanumeric data: any combination of letters, symbols, and numbers.
- Date/Time data: numeric data formatted to be a date or time stamp (e.g. DD/MM/YYYY or HH:MM:SS).
Data and Records
- A record is a collection of data items in a computer that creates an entity.
- Data on its own is seemingly meaningless words and numbers, and needs to be cleaned, organized, and analyzed to become information.
- Records combine data types together and organize them (e.g. grade book, personnel records, or birth records).
What is Information?
- Information is organized or classified data that has meaning for someone.
- To qualify as good information, processed data must be:
- Timely: available when needed.
- Accurate: accurate.
- Complete: not missing.
Data vs Information
- Data is a collection of raw, unorganized facts.
- Information puts those facts into an organized context and gives data meaning.
- Information is dependent on data, but data does not depend on information.
- A data scientist can take data and create a meaningful story with it.
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Description
Learn about the definition, types, and representation of data in computers, including characters, symbols, and main types.
