3.07 Parity Error Checking

3.7 Parity Error Checking Curriculum Page

Parity Error Checking: https://docs.google.com/document/d/1avldvPrHKoc_awYGUxQixevoW1tbtxuDVLruswscuoo/edit?usp=sharing

1. Explain how the error card trick from the Error Detection lesson uses a parity scheme. Was it an even or odd parity scheme?

The card trick uses an even parity scheme because it checks to see that all of the rows and all of the columns have an even amount of cards flipped over.

2. What are some of the limitations of using parity bits for error detection?

A parity bit has limitations when detecting errors because it has to use either an even parity scheme or an odd parity scheme and it also increases the size of the data that is being sent.

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?

A check sum is a digit that represents the sum of the correct digits in a piece of data. Check sums are used for comparisons against the data that can be used to detect errors within the code.

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.

Error detection finds errors in the bits. Error correction changes the bits to the correct values according to the error detection.