Question: 1 . To implement speculative execution in an in - order execution processor, a reorder buffer is not needed. However, to implement speculative execution in

1. To implement speculative execution in an in-order execution processor, a reorder buffer is not
needed. However, to implement speculative execution in an out-of-order execution processor, a
reorder buffer is needed. Explain why a reorder buffer is needed in the latter.

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