Methods of error detection
2.2What the syllabus asks of you
- Understand the need to check for errors after data transmission and how these errors can occur
- Describe the processes involved in each of the following error detection methods for detecting errors in data after transmission: parity check (odd and even), checksum and echo check
- Describe how a check digit is used to detect errors in data entry and identify examples of when a check digit is used, including international standard book numbers (ISBN) and bar codes
- Describe how an automatic repeat query (ARQ) can be used to establish that data is received without error
Read the notes first
Chapter 2: Methods of error detection
Drill this topic
All 24 questions on Methods of error detection, untimed — answer on paper, then mark yourself against the mark scheme.
Make a worksheet
Choose the years and how many questions, then print it with the answers on separate pages.
24 questions
These are structured questions, answered in working rather than by picking an option, so they are not listed here one by one. The drill above puts each in front of you with its mark scheme to check against.