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📝 Error Detection versus Correction in Data Link Layer

📖 From Data Communication & Networks • 10. Error Detection and Correction • 11 questions available

Practice MCQs for Error Detection versus Correction in Data Link Layer. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-07-31

3
Easy Questions
4
Medium Questions
4
Hard Questions

📝 Sample Questions

Q1. What is the main distinction between error detection and error correction in digital communication?

🔹 A. Detection only determines if an error occurred; correction also identifies the error’s location and value.
🔹 B. Detection corrects errors; correction only signals presence.
🔹 C. Both perform the same function but with different hardware.
🔹 D. Detection works only for burst errors.

💡 Difficulty: easy | ✅ Correct: A

Q2. An 8‑bit data unit can have a single‑bit error. How many distinct error conditions must a detector distinguish to both detect and correct any single‑bit error?

🔹 A. 8
🔹 B. 9
🔹 C. 16
🔹 D. 256

💡 Difficulty: medium | ✅ Correct: B

Q3. A burst error of length 4 flips consecutive bits in an 8‑bit word. Why is detecting this burst generally easier than correcting it?

🔹 A. Detection requires only one parity check, while correction needs to locate each flipped bit.
🔹 B. There are fewer possible burst patterns than single‑bit errors.
🔹 C. The syndrome for detection can be shorter than the syndrome needed for locating the exact bits.
🔹 D. Burst errors cannot be detected at all.

💡 Difficulty: hard | ✅ Correct: C

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🔗 Related Topics

📝 Types of Errors in Data Link Layer📝 Redundancy error detecting and correcting📝 Redundancy hrough Coding📝 Block Coding in Data Link Layer📝 Error Detection in Block Coding
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