Continuous Memory Location :: ASM

Hi.

I notice an interesting property of data variables declared in the .DATA section. For example, when you use BYTE swapping i.e. BYTE PSTR VariableName + #bytes, you could actually go belong the memory addresses of that a variable, which in this example is VariableName.

-----
.DATA

varOne DB 'testing 1 2 3'
varTwo DW 'September 2002'
...
...

mov ax, WORD PTR DB + 12
-----

In the last line above, the code will make a copy of "3" and "S." ASM is interesting because when you declare variables in .DATA, variables get memory locations right after one another. I am most familiar with C++. In C++, you have no idea where memory gets allocated.

Is it valid that in ASM memory gets allocated continuously, or is it random?

Thanks,
Kuphryn