What do u mean by Top down approach and Bottom up approach?
How will u implement these in u r project ?

Answer Posted / suresh.ch

Top down:
Testing starts from UAT, SRS, FS, Design, Coding which are
includes system testing after that functional testing after
that integration then unit testing.
Bottom UP:
Testing from bottom to top that is first unit then
integration then functional then system then verify it is
according to UAT.

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