MEMORY CONCEPT---ME GATE MOCK 1

Question

A main memory has 4096 blocks each consisting of 128 word of 32 bit. memory is word addressable.The number of bits require for main memory adress is_____________

I did as 4096 block=12 bit

             128 word=7 bit

each word 4 byte=2 bit  19+7+2=21 bit

but answer given as 12+7=19 bit WHY SO?

is it beacuse of the term word adressable 

Answer 1

My Answer is

Given is Word addressable then why to convert it into bytes its just 2¹² * 2⁷ = 2¹⁹

so the number of bits are 19

if its byte addressable and given in words then we convert word to byte