📝 Binary to BCD (Unpacked) Conversion in 8085 Microprocessor

📖 From An Introduction To Microprocessor 8085 • 6. Programming of 8085 • 13 questions available

Practice MCQs for Binary to BCD (Unpacked) Conversion in 8085 Microprocessor. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-07-30

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📝 Sample Questions

Q1. What does BCD stand for?

🔹 A. Binary Coded Decimal

🔹 B. Basic Computer Data

🔹 C. Binary Control Device

🔹 D. Byte Code Definition

💡 Difficulty: easy | ✅ Correct: A

Q2. In an 8085 program, after converting a binary number to unpacked BCD, why is it necessary to clear the upper nibble of each result byte?

🔹 A. To ensure each byte contains only a decimal digit 0‑9

🔹 B. To double the numeric value

🔹 C. To prepare the bytes for packed BCD conversion

🔹 D. To set the sign flag

💡 Difficulty: medium | ✅ Correct: A

Q3. Explain why the double‑dabble algorithm requires a left shift of the entire shift register before checking and possibly adding three to each BCD digit.

🔹 A. Because shifting aligns the next binary bit for processing and ensures the add‑3 correction maintains BCD limits

🔹 B. Because shifting reduces the number of bits

🔹 C. Because it converts the number to hexadecimal

🔹 D. Because it sets the carry flag

💡 Difficulty: hard | ✅ Correct: A

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🔗 Related Topics

📝 Simple Programs in 8085 Microprocessor 📝 BCD to Binary Conversion in 8085 Microprocessor 📝 Binary to ASCII Conversion in 8085 Microprocessor 📝 ASCII to Binary Conversion in 8085 Microprocessor 📝 Progams on addition and subtraction in 8085 Microprocessor

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