Explain three methods used to detect input errors.

Answer:

- Check digits-it is an extra digit added to a number to ensure that if the number is changed by mistake, the error will be detected.
- Verification-it is checking the data input manually by comparing the input
data with the original source.
- Validation-it is checking of data input with the help of computers programs using rules laid down in the program.
- Parity-it is used to check for transmission errors over networks or between memory and disk.
- Batch control-it is used in areas like stock control and accounting to trap errors.
- Data capture-using pre -printed forms which restrict data entry

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