I am into Basis, May I know what is the difference between 7.1 , 7.2, 7.3 from certification point of view.
7.1 documents are good enough to write netweaver 7.3 certification? or any other documents needs to refer.
NW 7.1, 7.2 are Java only, so I guess you are talking about NW AS Java? AFAIK the certification always involves ABAP, so you cannot run away from this. Using 7.1 focused material won't cover ABAP topics. As the architecture of AS Java changed quite a bit after 7.0, and 7.0 is not the go-to NetWeaver release anymore, I'd go for a 7.3 certification.
But that heavily depends on your actual needs. If your clients are running 7.0, being 7.0 certified may help, if they are going to or already on 7.3, for sure being certified in 7.3 may offer more value to you and them.
Dear arjun pls find the bellow link you can find all the information about your net weaver certification
all the best to you thank you