Encoding Schemes and Number System
CBSE · Class 11 · Computer Science
Step-by-step guide to study Encoding Schemes and Number System in CBSE Class 11 Computer Science. Topics to cover, practice strategy, and time allocation.
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Study Plan
Learn the Theory
Read the textbook chapter carefully. Note down definitions, formulas, and key concepts.
Practice Problems
Solve textbook exercises and additional practice questions. There are 86 questions available for this chapter.
Revise & Test
Revise key formulas and concepts without looking at notes. Take a practice quiz to test your understanding. Mark weak areas for re-revision.
Spaced Revision
Revisit Encoding Schemes and Number System after a week. Use flashcards for quick recall. Solve previous year questions from this chapter.
What to Focus On
- Encoding converts data into a coded form for computer processing.
- Cipher is coded form used to hide content.
- Keyboard keys are mapped to unique codes before binary conversion.
- ASCII is a 7-bit encoding scheme for English characters.
- ASCII capacity is 2^7 = 128 characters.
- ISCII is an 8-bit encoding scheme for Indian scripts.
- Radix or base is the number of unique symbols in a number system.
- Positional value depends on the place of a digit.
- Integer part positions start at 0 on the right.
Common Mistakes to Avoid
ASCII is an 8-bit code that represents all world languages.
ISCII is the same as ASCII because both are used for characters.
Unicode is just a bigger version of ASCII with completely different values.
Memory Tips
Encoding as converting data into a coded form
Cipher and encryption
Keyboard key to unique code to binary
ASCII meaning and purpose
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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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Practice Quiz
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Important Questions
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Revision Notes
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Formula Sheet
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Chapter Summary
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Concept Maps
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Flashcards
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Syllabus
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NCERT Solutions
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