# Self Doubt

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What does additional memory for tags refer to in Direct Mapping, Associative Mapping and Set- Associative Mapping?

## Related questions

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Is pipeline hazards there in the syllabus? And are there any previous year questions from there?
GATE2018-50 https://gateoverflow.in/204125/gate2018-50 Why can't I do this question with $(k+(n-1))*t_p$ For PO stage: $0.40*3 + 0.35*2 + 0.25*1 = 2.15$ cycles. This is larger than all the 5 stages of the given pipeline. So applying the above formula it gives $(5+99)*2.15 =224$ cycles. why we use the expanded form of the same formula $k*t_p+(n-1)t_p$ and get answer as $219$ cycles