E and F are the real winners here. Full data redaction is the way to go, and random redaction is always a safe bet. Gotta keep that sensitive data secure, no matter how tempting it is to get creative.
Haha, I bet the developer who came up with option D was having a bit too much fun with the random redaction methods. 'Let's just replace the first nine digits with 1, that'll do the trick!'
I'm pretty sure B and D are not correct. Replacing only the first digit doesn't seem like a full redaction, and replacing the first nine digits of the COMMISSION_PCT column with 1 is just bizarre.
A and C seem to be the correct options here. Replacing the first four digits of the SALARY column with 9 and the first digit of the COMMISSION_PCT column with 9 makes sense for data redaction.
Pearlie
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