Answer Posted / nishanthi
Overriding - same method names with same arguments and same
return types associated in a class and its subclass.
Overloading - same method name with different arguments,
may or may not be same return type written in the same
class itself.
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write a code for this. serial_number contained in the header of the file will be read , if this serial number is less than a previous serial number within a successfully processed file, or is the same as another serial number within a successfully processed file, or if the field contains anything other than 7 digits, then the file must error with the reason ‘Invalid SERIAL_NUMBER’.
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