Computer System — Class 11 MCQs with Answers
Class 11 CBSE Computer Science · Chapter 1
30 practice questions · 30 Medium · Updated
Practise the most important Class 11 CBSE Computer Science questions from Chapter 1, "Computer 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 "Computer 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 Computer 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.
Computer 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
Inside the CPU, which component interprets instructions and guides the flow of data through memory, the ALU and the input/output devices?
A.RegisterB.Arithmetic Logic UnitC.Control Unit✓ CorrectD.Cache memoryAnswer: C. Control Unit
Explanation: The Control Unit controls sequential instruction execution, interprets instructions and guides data flow through memory, the ALU and the input or output devices; the ALU only performs arithmetic and logic operations.
- Q2Medium
A 4-bit word is called a nibble. An 8-bit word is called:
A.A double nibble word onlyB.A byte✓ CorrectC.A kilobyteD.A registerAnswer: B. A byte
Explanation: Two nibbles together make an 8-bit word, and an 8-bit word is called a byte.
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Start this chapter free →Computer System — FAQs
What does Class 11 Computer Science Chapter 1 (Computer System) cover on XamBaaz?+
It has 30 NCERT-based MCQs on "Computer 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 "Computer System" questions free to practise?+
Yes. Sign in with Google to practise "Computer 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 "Computer 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 "Computer 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 "Computer 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 Computer 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 Computer System?+
Yes — Class 11 Computer Science Computer 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.