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Error Detection Video Lecture | English Language Preparation for CUET UG
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FAQs on Error Detection Video Lecture - English Language Preparation for CUET UG
| $1. What is error detection and why is it important in data communication? |  |
| $2. What are the common methods of error detection? | |
Ans.Common methods of error detection include parity checks, checksums, and cyclic redundancy checks (CRC). Parity checks add a parity bit to the data to make the number of 1s either even (even parity) or odd (odd parity). Checksums involve summing up the data and sending the total, while CRC uses polynomial division to detect changes to raw data.
| $3. How does a checksum work in error detection? | |
Ans.A checksum works by performing a mathematical operation on a block of data and generating a fixed-size value, known as the checksum. This value is sent along with the data. The receiver performs the same operation on the received data and compares the result with the transmitted checksum. If they match, the data is assumed to be error-free; if not, an error is detected.
| $4. What is the difference between error detection and error correction? | |
Ans.Error detection involves identifying the presence of errors in transmitted data, whereas error correction involves locating and fixing those errors. While error detection can signal that there is a problem, error correction techniques like Hamming code or Reed-Solomon can actually correct the detected errors without requiring retransmission.
| $5. In what scenarios is error detection most critical? | |
Ans.Error detection is most critical in scenarios where data integrity is paramount, such as in financial transactions, medical records, and critical communications. In these cases, even a small error can lead to significant consequences, making reliable error detection essential for ensuring that the transmitted data remains accurate and trustworthy.
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Video Description: Error Detection for CUET 2025 is part of English Language Preparation for CUET UG preparation.
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