Which of the following is true about the logical rack's I/O point counts?

• A. 128 input points and 128 output points
• B. 256 input points and 256 output points
• C. 64 input points and 128 output points
• D. 32 input points and 32 output points

Answer: (A)

This question tests how a logical rack defines its I/O capacity in a PLC. In this PLC setup, the rack provides an equal number of input and output points: 128 digital inputs and 128 digital outputs. That gives a total of 256 discrete I/O points, with the input side and output side addressed separately. The other options propose unequal or smaller counts that don’t match how this logical rack is specified. So, 128 inputs and 128 outputs best reflect the rack’s defined capacity.