which situation will decide the approach (topdown/bottom up)
to choose from?

Answer Posted / raghu

Top down approach first parent modules will be debeloped
and then will be intergratedto the corresponding child
modules.--Here stub will be used as a temporary module.
BottonUp approach first child modules will be developed and
then will be intergrated back to the corresponding paren
module.--Here drivers will be used as a temporary module.

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