Encoding Schemes and Number System
CBSE · Class 11 · Computer Science
Summary of Encoding Schemes and Number System for CBSE Class 11 Computer Science. Key concepts, important points, and chapter overview.
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Overview
Encoding converts human-readable characters into coded forms that a computer can process. Computers understand only binary 0s and 1s, so keyboard input is first mapped to a unique code and then converted into binary. ASCII, ISCII, and UNICODE are major encoding schemes, while decimal, binary, octal,
Key Concepts
Encoding is the mechanism of converting
Encoding is the mechanism of converting data into an equivalent cipher using a specific code. A key pressed on the keyboard is mapped to a unique code
ASCII stands for American Standard Code
ASCII stands for American Standard Code for Information Interchange. It was developed in the early 1960s for standardising character representation. I
ISCII stands for Indian Script Code
ISCII stands for Indian Script Code for Information Interchange. It was developed in India during the mid 1980s for Indian languages. It uses 8 bits a
UNICODE is a standard developed
UNICODE is a standard developed to include all characters of every written language of the world. It gives a unique number to every character, regardl
The decimal number system is
The decimal number system is the base-10 positional number system used in daily life. It uses the digits 0 to 9. The value of each digit depends on it
Learning Objectives
- Understand the idea of encoding and cipher
- Know the purpose and features of ASCII, ISCII, and UNICODE
- Identify the four number systems used in computers
- Use positional value to represent numbers in different bases
- Convert numbers between decimal, binary, octal, and hexadecimal systems
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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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