Understanding Data
CBSE · Class 11 · Informatics Practices
Summary of Understanding Data for CBSE Class 11 Informatics Practices. Key concepts, important points, and chapter overview.
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Overview
Data is a collection of characters, numbers, and other symbols that represents values of situations or variables. It is plural, and the singular form is datum. Data become useful only after processing and analysis, because raw data alone do not directly give decisions. The chapter connects the idea
Key Concepts
Data are facts represented using characters
Data are facts represented using characters, numbers, and symbols. Data are stored electronically for fast processing and easy retrieval. They are use
Structured data is organised in
Structured data is organised in a well-defined tabular format with rows and columns. Each column represents an attribute, and each row represents an o
Unstructured data does not follow
Unstructured data does not follow a fixed row-and-column pattern. Examples include newspaper content, emails, web pages, social media messages, and mu
Metadata is data about data
Metadata is data about data. It describes unstructured data, such as email subject, recipient, attachment, and image size, type, and resolution.
Data collection means identifying already available
Data collection means identifying already available data or gathering data from appropriate sources. Data may be collected from registers, digital fil
Learning Objectives
- Understand what data means and why it is important
- Differentiate between structured data and unstructured data
- Recognise metadata and its role in describing unstructured data
- Understand data collection, data storage, and data processing
- Learn why file processing has limitations and why DBMS is useful
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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