any grammar

only context-free grammar

Both (a) and (b)

only regular grammar

output of the former depends on the present state and present input

output of the former depends only on the present state

output of former depends only on the present input

all of these

regular expression

DFSM

NDFSM

all of these

Designing computers

Designing compilers

Both (a) and(b)

Developing computers

at least one of the set Si is a finite set

not more than one of the sets Si can be finite

at least one of the sets Si is an infinite set

not more than one of the sets Si can be infinite