(a) Describe each of the following validation checks as used in data processing:
(i) Preserve check
It is a measure placed used to ensure that data item is in its original status.
(ii) Data type check
It is a measure that ensures that correct data type is entered for each field.
(iii) Check digit
This is a number calculated by the computer to make sure that the other numbers in a sequence have been entered properly.
(b) Write the following acronyms in full
Binary Coded Decimal
Extended Binary Coded Decimal Interchange Code.
American Standard Code for Information Interchange
(e) Using 10— bits binary number system, perform the following decimal operation in two’s complement (6 marks)