NCERT Class 11 Informatics Practices Informatics Practices: Chapter 5 — Understanding Data
This chapter, "Understanding Data," from NCERT Class 11 Informatics Practices, introduces the fundamental concept of data and its significance in decision-making across various fields. It explains that data, a collection of characters, numbers, and symbols representing values, is crucial for informed choices, citing examples like college selection, government census, sports strategy, and banking. The chapter emphasizes that raw data often requires processing and analysis to become useful information, highlighting the role of computers and ICT in handling the vast amounts of data generated today. It also touches upon the importance of data in forming knowledge bases for AI systems and how processed data reveals possibilities and hidden patterns, aiding human decision-making. The text defines data as plural, with "datum" as its singular form, and notes the shift towards electronic storage for faster processing.
Quick info
| Board | CBSE / NCERT |
|---|---|
| Class | Class 11 |
| Subject | Informatics Practices |
| Book | Informatics Practices |
| Chapter | Chapter 5 — Understanding Data |
| Language | English |
| PDF type | NCERT Textbook |
| Session | CBSE 2026 |
| Reading time | 3 minutes |
| Word count | 501 |
Learning outcomes
- Understand the definition and nature of data.
- Recognize the importance of data in various real-world applications and decision-making.
- Appreciate the need for data processing and analysis to derive meaningful information.
- Identify different types of data encountered in daily life and technology.
Vocabulary
| Word | Meaning |
|---|---|
| Data | A collection of characters, numbers, and other symbols that represent values of some situations or variables. |
| Datum | The singular form of data. |
| Information | Processed data that provides context and meaning. |
| Knowledge base | A store of information consisting of facts, assumptions, and rules used by an AI system for decision making. |
| Census | A systematic process of collecting and recording data about a population. |
| ICT | Information and Communication Technology. |
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Practice questions
- What is data? Answer: Data is a collection of characters, numbers, and other symbols that represent values of some situations or variables.
- What is the singular form of the word 'data'? Answer: The singular form of 'data' is 'datum'.
- Why is data important in fields like government and sports? Answer: Data is important for planning policies (government) and making strategies based on performance analysis (sports).
- Why is data processing necessary? Answer: Data processing is necessary because raw data itself is often difficult to interpret and needs analysis to derive meaningful information for decision-making.
Practice MCQs
Q1. What is the singular form of 'data'?
Explanation: The text explicitly states that the singular form of 'data' is 'datum'.
Q2. Which of the following is an example of data?
Explanation: The chapter lists 'Name, age, gender, contact details, etc., of a person' as examples of data.
Q3. What is a 'knowledge base' used for?
Explanation: A knowledge base is defined as a store of information that an AI system can use for decision making.
Q4. Why are computers used for data storage and processing?
Explanation: The chapter mentions that using computers, data processing becomes faster and easier compared to manual methods.
Q5. The ICT revolution has led to:
Explanation: The text states that the ICT revolution has resulted in the generation of large volumes of data at a very fast pace.
Frequently asked questions
What is the core definition of data according to the chapter?
Data is defined as a collection of characters, numbers, and other symbols that represent values of some situations or variables.
What is the singular form of 'data'?
The singular form of 'data' is 'datum'.
Why is data crucial for decision-making?
Data provides the basis for informed decisions by offering insights into past performances, trends, and various factors relevant to a situation.
How do computers help in handling data?
Computers enable faster and easier storage and processing of data compared to manual methods.
What impact has the ICT revolution had on data?
The ICT revolution has led to the generation of a very large volume of data at a fast pace.
What is a 'knowledge base' in the context of AI?
A knowledge base is a store of information, facts, assumptions, and rules that an AI system uses for decision making.
Related resources
Important topics
Topics covered
NCERT Class 11 Informatics Practices — Informatics Practices — Chapter 5 — Understanding Data. Verified by NCERT Help Editorial Team. Reviewed on 29 Jul 2026. Last updated 10 Aug 2026.