Explanation : Statement I is not necessary because at the
same point of time, data need not to be exactly
same. Therefore, write back policy can also be
used.
Statement I I i s not necessary when when
discussing only about L1 and L2.
Statement I I I i s not necessary because
associativity can be equal.
Statement IV is necessary, The L2 cache must be
at least as large as the L1 cache.
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