if i install .net framework 2.0 only and not .net framework 1.0/1.1, will applications made for 1.0/1.1 run?

Question

like updating java runtime environment ensures that any java program ever made will run, is this the case with .net framework 2.0 also?

Answer 1

Not all: Microsoft policy is based on backward incompatibility. The aim is: to make you always buy new, newer and newest MS products.