Question

How to calculate address lines for memory?

Answer 1

Assuming that number of address lines (address bits) is n, how can we find n? If n=1, you can only address 2 locations (0 and 1). If n=2, you can address 2 locations (0, 1, 2, and 3). As you can see, number of addressable locations = n^2.
Given that number of addressable locations = 1024, then 1024=2^n
This means that n=log(1024) to the base 2.
Thus, n=10.