Convert decimal 13 to binary and show steps.
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13 ÷ 2 = 6 remainder 1, 6 ÷ 2 = 3 r 0, 3 ÷ 2 = 1 r 1, 1 ÷ 2 = 0 r 1. Remainders upward: 1101. Check: 8+4+1=13. Write remainders from last to first.
Class 9 · कंप्यूटर · 255+ Q&A
Class 9 Computer — Number System Important Questions with Answers (Short answers)
IT basics, hardware, software, internet safety and MS Office for Class 9. Showing 4 of 4 on page 1 / 1.
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All chapters
1. Hardware
2. Software
3. Operating System
4. Memory and Storage
5. Input and Output
6. Networking
7. Internet and Email
8. Cyber Safety
9. MS Office
10. Number System
11. IPR and Digital Ethics
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Why do computers use binary?
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Electronic circuits easily show two states: on/off, high/low voltage. Two symbols 0 and 1 are enough to code numbers, text (ASCII/Unicode) and instructions. Binary is simple for hardware, even if long for humans.
Convert binary 10110 to decimal.
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Places from the right: 0×1 + 1×2 + 1×4 + 0×8 + 1×16 = 2+4+16 = 22. Write the weights 16 8 4 2 1 under the digits. Check by converting 22 back if time allows.
What is ASCII? Why is Unicode needed?
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ASCII maps English letters and control codes to numbers (e.g. ‘A’ is 65 in decimal). Unicode can represent Hindi and many scripts so Class 9 Hindi files display correctly. Encoding mismatch shows box characters.
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Class 9 Computer में कितने प्रश्न हैं? 255 महत्वपूर्ण प्रश्न: 174 MCQ, 50 लघु, 31 दीर्घ।
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