SAP ABAP Interview Questions Question 1: What is the diference between User Exit and Function Exit?User Exit Customer ExitUser exit is implemented in the form of a Subroutine i.e. PERFORM xxx.Example: INCU!E M"F#$F%% PERFORM userexit&sa'e&do(ument&prepare.$ (ustomer exit (an be implemented as: Fun(tion exit S(reen Exit Menu Exit Field ExitExample: C$ Customer fun(tion )xxx*INCU!E xxx.+ou modif, this in(lude.In (ase of a PERFORM- ,ou ha'e a((ess to almost all the data. So ,ou ha'e better (ontrol- but more ris. of ma.in/ the s,stem unstable.+ou ha'e a((ess onl, to the importin/- exportin/- (han/in/ and tables parameter of the Fun(tion Module. So ,ou ha'e limited a((ess to data.User exit is (onsidered a modi0(ationand not an enhan(ement.$ (ustomer exit is (onsidered an enhan(ement.+ou need $((ess 1e, for User Exit. +ou do not need a((ess .e,.Chan/es are lost in (ase of an up/rade.Chan/es are up/rade (ompatible.User exit is the earliest form of (han/e option o2ered b, S$P.Customer exits (ame later and the, o'er(ome the short(omin/s of User Exit.No su(h thin/ is re3uired here. 4o a(ti'ate a fun(tion exit- ,ou need to (reate a pro5e(t in SMO! and a(ti'ate the pro5e(t. What is the diference between RFC and BAP? BAP RFC6ust as 7oo/le o2ers Ima/e8Chart8Map $PIs OR Fa(eboo. o2ers $PIs for Comment8i.e- S$P o2ers $PIs in the form of 9$PIs. 9$PI RFC is nothin/ but a remote enabled fun(tion module. So if there is a Fun(tion Module in S$P s,stem : on ser'er ; - it (an be (alled from a S$P is a librar, of fun(tion modules released b, S$P to the publi( so that the, (an interfa(e