A. Extend one of visors of the Water level
observation device and place it on the wave
produced by a single source. What part of the
wave do the dark lines represent? What part of
the wave do the light lines represent?
cewbor

Consider a file currently consisting of 200 blocks. assume that the file control block (and the index block in the case of indexed allocation) is already in memory. calculate how many disk i/o operations are required for contiguous, linked, and indexed (single-level) allocation strategies, for each of the conditions listed below. in the contiguous-allocation case, assume that there is not room to grow at the beginning but there is room to grow at the end. also assume that the block information to be added is stored in memory.