A computer would process the phrase “hello world” as a string of 1’s and 0’s.
This is because all data in a computer, including text, is ultimately represented in binary form (1's and 0's). It could also be represented as ASCII text (each character has a numeric value in the ASCII table), which then translates into binary, but at the most fundamental level, the computer works with binary (1's and 0's).
Thus, the best response is: as a string of 1’s and 0’s.