A linear Map T from a Banach algebra A into another B preserves zero product if T(a)T(b)=0 where a,b belongs to A are such that ab=0. This thesis is mainly concerned with the question Of whether every continuous linear surjective map T that preserves zero product is A weighted homomorphism. This is indeed the case for a large dir=rtl align=right Our method involves continuous bilinear maps ? from A×A into a Banach space X such that ? preserves zero product. We prove that such a map necessarily satisfie ?(aµ,b)= ?(a,µb). For every a and b in A and µ in the closure of D(A) in the strong operator topology where D(A) is the subalgebra of the multiplier algebra of A generated by doubly-power bounded elements. This method is also shown to be useful for characterizing derivations through zero products. At the end of our investigation, we introduce the generalized derivations. We will show that under appropriate situations some linear operators can be generalized derivations. Also we will see that a generalized derivation can be a derivation if it's considered under appropriate consumptions.