Question: Which is valid statement for the LOOK algorithm the read / write head always moves till the inner and outermost cylinders even though there is

Which is valid statement for the LOOK algorithm
the read/write head always moves till the inner and outermost cylinders even though there is no data request
the read/write head moves till the highest and lowest number of cylinder data request
the read/write operation performs only in one direction
the read/write operation provides uniform waiting time

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