Set Associative :
Block Size increase => offset field size increase
No of blocks decrease =>No of sets decrease => Set field size decrease
The combined field size (set + offset) will remain constant . So tag field will not change
Block Size decrease => offset field size decrease
No of blocks increase =>No of sets increase => Set field size increase
The combined field size (set + offset) will remain constant . So tag field will not change
Direct Mapped :
Block Size increase => offset field size increase
No of blocks decrease => Index field size decrease
The combined field size (offset + index) will remain constant . So tag field will not change
Block Size decrease => offset field size decrease
No of blocks increase =>Index field size increase
The combined field size (offset + index) will remain constant . So tag field will not change
Fully Associative :
Block Size Increase => Offset field size increase => Tag size decrease
Block Size decrease => Offset field size decrease => Tag size increase