madeeast test series

Question

Consider the following cache A and B. Let the average access times in cache A and B is t_A  and t_B  respectively. Find the value (in ns) of t_A + t_B.

here questio is solved i solution with hierarchical technnique ..............but how to know simultaneous or hierachy becz nothig is metion i question ad as i studied whe othing is metioned we use simultaeous tech.pleae verify

Comments

when nothing mentined hierarchichal is preferred .

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there are many previous year questios where nothing is mentioned and defaultly simultaneous is used