Binary Number System Class 7 MCQs
Binary Number System – Class 7 MCQs with Answers & Explanations
Class: CBSE Class 7
Subject: Computer Science
Section: Number System
Topic: Binary Number System
Subject: Computer Science
Section: Number System
Topic: Binary Number System
Strictly Based on NCERT Syllabus | Useful for CBSE Unit Tests • Half‑Yearly • Annual Examinations
1. Binary number system has base:
Answer: a)
Binary system uses only two digits (0 and 1), so its base is 2.
Binary system uses only two digits (0 and 1), so its base is 2.
2. Digits used in binary system are:
Answer: c)
Binary numbers are formed using only 0 and 1.
Binary numbers are formed using only 0 and 1.
3. Computers understand data in:
Answer: b)
All computer operations are based on binary language.
All computer operations are based on binary language.
4. Binary 101 represents:
Answer: b)
It contains only binary digits 0 and 1.
It contains only binary digits 0 and 1.
5. The place values in binary are powers of:
Answer: a)
Binary place values increase as powers of 2 (1,2,4,8…).
Binary place values increase as powers of 2 (1,2,4,8…).
6. 1 byte equals:
Answer: c)
Eight binary digits together form one byte.
Eight binary digits together form one byte.
7. A single binary digit is called:
Answer: b)
Bit stands for Binary Digit.
Bit stands for Binary Digit.
8. Which is not a binary number?
Answer: c)
Digit 2 is not allowed in binary.
Digit 2 is not allowed in binary.
9. Binary equivalent of OFF state is:
Answer: b)
0 represents OFF or FALSE state.
0 represents OFF or FALSE state.
10. Binary equivalent of ON state is:
Answer: b)
1 represents ON or TRUE state.
1 represents ON or TRUE state.
11. 4 bits make:
Answer: b)
Four bits together form one nibble.
Four bits together form one nibble.
12. Binary system is used because computers use:
Answer: a)
Electronic switches have two states: ON and OFF.
Electronic switches have two states: ON and OFF.
13. Smallest unit of data is:
Answer: b)
Bit is the smallest data unit.
Bit is the smallest data unit.
14. 0 in binary means:
Answer: b)
0 indicates false or off state.
0 indicates false or off state.
15. 1 in binary means:
Answer: c)
1 indicates true or on state.
1 indicates true or on state.
16. Binary numbers are also called:
Answer: a)
Binary system has base 2.
Binary system has base 2.
17. Example of 8‑bit binary:
Answer: b)
It contains 8 binary digits.
It contains 8 binary digits.
18. Binary is important for:
Answer: a)
Computers process all data in binary form.
Computers process all data in binary form.
19. Which device uses binary signals?
Answer: a)
Computers operate using binary electrical signals.
Computers operate using binary electrical signals.
20. Binary helps computers to:
Answer: a)
Binary language allows computers to process and execute instructions.
Binary language allows computers to process and execute instructions.