Encoding Schemes and Number System — Class 11 MCQs with Answers
Class 11 CBSE Computer Science · Chapter 2
30 practice questions · 30 Medium · Updated
Practise the most important Class 11 CBSE Computer Science questions from Chapter 2, "Encoding Schemes and Number System". You get 3 timed quizzes made from 30 NCERT-based MCQs, with answers and explanations. The questions are split into 30 Medium. Warm up on the basics, then move on to the exam-level questions that set top scorers in CBSE Board exams apart.
To score well in "Encoding Schemes and Number System", focus on logic, syntax and computational thinking. Each MCQ here is timed and uses exam-style marking (+4 correct, −1 wrong, 0 skipped). This trains you to stay accurate under time pressure, as real papers need. Every question has a short explanation, so a wrong answer becomes a quick lesson. It is the fastest way to fix gaps before a test.
Use this chapter for focused revision. Start with the Easy set to check your basics on Encoding Schemes and Number System, then move to Medium to practise applying them. Your accuracy, streaks and XP save automatically. This chapter also adds to your overall Class 11 Computer Science mastery score. 2 sample questions are solved in full below, with the answer and a worked explanation. Sign in free to start practising.
Encoding Schemes and Number System — important questions & MCQs with answers (Class 11 Computer Science)
2 solved questions from this chapter's difficulty levels, each with its answer and explanation. The other 28 are timed and scored when you sign in.
- Q1Medium
Initially ASCII used 7 bits per character. The total number of different characters that a 7-bit ASCII code can encode is:
A.256B.127C.128✓ CorrectD.64Answer: C. 128
Explanation: With 2 binary digits available per bit, 7 bits give 2⁷ = 128 distinct codes.
- Q2Medium
The count of unique literals used by a number system is called its:
A.Positional valueB.Symbol valueC.Radix✓ CorrectD.Fraction partAnswer: C. Radix
Explanation: The count of the unique characters or literals of a number system is called the radix or base of that system.
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Start this chapter free →Encoding Schemes and Number System — FAQs
What does Class 11 Computer Science Chapter 2 (Encoding Schemes and Number System) cover on XamBaaz?+
It has 30 NCERT-based MCQs on "Encoding Schemes and Number System": 30 Medium. Together they make 3 timed quizzes, and you never get the same set twice. Every question has an instant explanation. They help you prepare for CBSE Board exams.
Are these "Encoding Schemes and Number System" questions free to practise?+
Yes. Sign in with Google to practise "Encoding Schemes and Number System" free. Full unlimited access is ₹999/year on a launch offer until 1 December 2026. No chapter is charged separately.
How should I revise "Encoding Schemes and Number System" for the exam?+
Start with the Easy quiz to check your basics, then try Medium to practise applying them. There are 3 timed quizzes on this chapter, so you can come back for a fresh set instead of one you have seen. Read each explanation, retry the questions you miss, and track your accuracy until it stays high.
Are these "Encoding Schemes and Number System" MCQs available with answers?+
Yes. 2 sample questions are shown here in full, each with the correct option and a step-by-step "Why" explanation. Sign in free with Google to start practising, with instant scoring.
Is there negative marking in the "Encoding Schemes and Number System" quizzes?+
Yes. The timed quizzes use exam-style marking: +4 for a right answer, −1 for a wrong one and 0 for a skip. MHT-CET and CBSE board papers have no negative marking. Our mocks for those are scored their way.
What are the important questions from Encoding Schemes and Number System (Class 11 Computer Science)?+
This page shows 2 solved important MCQs with answers and explanations; all 30 questions on the chapter are available as timed quizzes once you sign in.
Is there an online quiz for Encoding Schemes and Number System?+
Yes — Class 11 Computer Science Encoding Schemes and Number System has timed online quizzes at Medium levels, with instant scoring and a worked explanation on every question. The first quiz on the chapter is free.