SHA-256 is the recommended stronger alternative to SHA-1. See FIPS PUB 180-4 for implementation details.

Either by using a dedicated library or implementing the algorithm in your language, show that the SHA-256 digest of the string "Rosetta code" is: 764faf5c61ac315f1497f9dfa542713965b785e5cc2f707d6468d7d1124cdfcf

USER>set hash=$System.Encryption.SHAHash(256, "Rosetta code")
USER>zzdump hash
0000: 76 4F AF 5C 61 AC 31 5F 14 97 F9 DF A5 42 71 39
0010: 65 B7 85 E5 CC 2F 70 7D 64 68 D7 D1 12 4C DF CF