Which mode in 8255 PPI allows handshake I/O?

Which mode in 8255 PPI allows handshake I/O?

  1. a) Mode-0
  2. b) Mode-1
  3. c) Mode-2
  4. d) None of the above

From the BCS Technical Cadre (ICT) October 2025 – 49th BCS Written (Special) (BPSC) exam, question 65 of 106.

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