18 address lines is how much memory?

Answer 1

to find the memory from address lines. you just have to make address liness power of 2, as shown below for 12 address lines 212 bits. 212 = 22 * 210 = 4 Kb
that means we can address 4 Kb from 12 address lines.........

Answer 2

2^12 = 4096

4096= 1024*4=(2^10)*4= 4 kbytes

Answer 3

18 address lines is 218 or 262,144 different addresses.

Answer 4

it maps the memory of 4096 byte i.e 2^12=4096 byte