Chapter Exam

Chapter 2: Number Systems — Online MCQ Test

Q: What is the base of the Hexadecimal number system?

Answer: C. 16 — The Hexadecimal system uses 16 symbols ranging from 0-9 and A-F.

Q: Which of the following is the most significant digit in the number 456?

Answer: C. 4 — The most significant digit (MSD) is the leftmost digit, which holds the highest place value.

Q: Convert the decimal number 10 into binary.

Answer: B. 1010 — Dividing 10 by 2 repeatedly gives a remainder sequence of 0, 1, 0, 1, which read bottom-up is 1010.

Q: Identify the octal equivalent of the binary number 101110.

Answer: B. 56 — Grouping bits into threes from the right: (101) = 5 and (110) = 6, resulting in 56.

Q: If a number system has a radix r, the digits range from:

Answer: C. 0 to r-1 — Any number system with base (radix) r uses digits from 0 up to r-1.

COMPUTER SCIENCE · CLASS 11th · Tamil Nadu State Board

Practice Chapter 2: Number Systems with a free chapter-wise online MCQ test for Tamil Nadu State Board CLASS 11th COMPUTER SCIENCE. This chapter covers: Focusing on digital data representation this chapter covers binary octal decimal and hexadecimal conversions. Students master binary arithmetic signed number representations and ch.... AI-generated questions from basic to board-exam level, with instant results and explanations.

Questions

20m

Time Limit

Attempts Left

10 random questions from this chapter (mixed difficulty)
Questions you've seen before won't repeat until the pool resets
You have 20 minutes — exam auto-submits when time is up
Maximum 3 attempts per chapter
Results and explanations shown immediately after submission

New here? Register free — includes 3 free chapter exams.

Chapter 2: Number Systems — Important Questions & Answers (FAQ)

Frequently asked questions from Tamil Nadu State Board CLASS 11th COMPUTER SCIENCE — Chapter 2: Number Systems, with answers and explanations. These are sample questions; the exam has its own separate question set.

What is the base of the Hexadecimal number system?

A. 8
B. 10
C. 16 ✓
D. 2

Answer: C. 16
The Hexadecimal system uses 16 symbols ranging from 0-9 and A-F.

Which of the following is the most significant digit in the number 456?

A. 6
B. 5
C. 4 ✓
D. None of these

Answer: C. 4
The most significant digit (MSD) is the leftmost digit, which holds the highest place value.

Convert the decimal number 10 into binary.

A. 1000
B. 1010 ✓
C. 1100
D. 1001

Answer: B. 1010
Dividing 10 by 2 repeatedly gives a remainder sequence of 0, 1, 0, 1, which read bottom-up is 1010.

Identify the octal equivalent of the binary number 101110.

A. 46
B. 56 ✓
C. 64
D. 54

Answer: B. 56
Grouping bits into threes from the right: (101) = 5 and (110) = 6, resulting in 56.

If a number system has a radix r, the digits range from:

A. 1 to r
B. 0 to r
C. 0 to r-1 ✓
D. 1 to r-1

Answer: C. 0 to r-1
Any number system with base (radix) r uses digits from 0 up to r-1.

Choose Your Plan & Start Practising

All plans cover every subject and chapter of your registered grade.

Free

₹0

3 exams · 1 year

Start Free →

Active

₹350

12 exams · 1 year

Get Active →

Pro

₹899

Unlimited exams · 1 year

Get Pro →

Compare all plans in detail →