Answer the following questions:
1. Explain how the error card trick from the Error Detection lesson uses a parity scheme. Was it an even or odd parity scheme?
Answer
Even parity was used for the card trick in that the rows and columns with odd overturned cards were given an additional overturned card to make the total an even number.
2. What are some of the limitations of using parity bits for error detection?
Answer
It only works for certain if there is one error. If there is more than one error, there will be confusion as to where the odd or even rows and columns intersect.
3. Another type of error detection is a check sum. Research what a check sum is and then describe it in your own words. Can a check sum identify where an error occurs?
Answer
A check sum is another error detection. In this specific type of error detection, you can determine if there is an error somewhere in the series of numbers of the code, but cannot identify exactly where that error may be.
4. (Optional) Explain in your own words the difference between error detection and error correction. Describe how the error correction process used in the video above allows the computer to fix errors.
Answer
Error detection is an algorithm that can identify that an error exists, whereas error correction can actually make the change to correct the error.