I am a 2004  passout  B.E(CSE) Fresher.I had taken the ACCENTURE  written test on last sunday.I cleared that.Next was HR Interview + Technical Interview on following days.Acutally Questions for Written test Comprises of
1.Aptitude(Analytical(15)+Quantiapps(10)+Mental(10)) = 35 Questions
2.Technical (C(20) & C++(20) Questions)               = 40 Questions
For Aptitude R.S Agarwal is enough to crack this.For technical u have to grill the "Test ur C & C++ Skill" books.Most of the questions r repeated from prev. question paper.
In C++,Mostly from Polymorphism,inheritence,virtual functions,constructors.
In C,Mostly from scope of variable,pointers,structures.Its quite easy when compare to C++.
Go on. Be a Tiger.
HR Interview:
Its cool and relax round.
1.First they will ask u to intro urself.
2.Ur strength and weakness.Be clear abt this.
3.Ur acheivements
4.They are very particular abt the GAPS in our studies.
5.Ur Hobbies.
6.Why u choose accenture and tell abt it.
7.Willing to relocate.(Say Yes &.ready to work  anywhere for  accenture)
Technical Interview:

1.Abt Ur project.(u will be grilled by them)
2.Be confidence.(They will check ur temper by asking some questions)
3.Abt software development life cycle
4.Abt ur interest area in computer field
5.Abt memory management in Operating System.
6.Abt Unix basic commands
7.Abt doubly linked list
8.Fibonacci series and palindrome program in C.
9.Abt Gates(Be prepare on Digital Circuit Logic Design)
10.Abt complier design(phases)
11.Abt TCP&IP and OSI Model.
12.Abt OOPS concepts.
By god grace I cleared all this and i got the Offer letter.So U people can clear this easily.Be Confidence and Be Humble.Every One will have a day.So don't Worry abt ur past.