what are difference mov and lea instruction?

Answer 1

It all depends on which microprocessor you are using.

Here is a good link for lea

http://www-scm.tees.ac.uk/users/u0000408/Instruct/_LEA.htm

here for mov
http://www.cs.ucd.ie/staff/jcarthy/home//alp/alp1.html

In LEA you load an address (or a pointer to data)
In MOV you can load data directly