MadeEasy Subject Test 2019: CO & Architecture - Cache Memory

Question

 

how to approcach such questions please help with all the three statements.

Comments

@Magma

it is asking about no.of tags but not number of tag bits, i already mentioned in my comment

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I did bad mistakes always :3

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If question are asking in context of number of bit  then giver answer is right but if question are asking in context of number of tags (== number of lines) then @Shaik Masthan sir answer is right..