Thanks for your reply and giving your precious time to me.
I think, MOS doc you have given is wrong,it should be 741818.1.
If other persons shares his/her knowledge in my both cases,i will be very grateful to him/her.
For backups and restores of EBS, the database tier and app tier backups/restores have to be synchronized, since the patch levels on both tiers have to match. You cannot backup/restore database or app tier independently of the other tier.