A system with 64GB memory with a block size of 4 words, and a 256KB direct map cache . The word size is 2 bytes.

What is the number of address bits reserved for the Line number field?

18

16

15

11

What is the number of bits reserved for the Tag field?

20

36

33

18

The main memory block # 4095 (in decimal) will directly map to cache line?

1023

2047

1

4095

The number of address lines the memory has is

26

35

32

31