dbexam.com has the efforts of so many professionals that can be seen through the quality of mock tests on the site. The site actually helps professionals like me in clearing oracle certification exam through the 1Z0-580 practice tests that has more than 205 Questions and Answers. The online practice exam gives you the flexibility to appear for it, whenever you feel like, even on the go. My profession requires me to travel frequently and this site came as a boon to me. I have given 100% dedication in giving mock tests as sincerity in these tests will prepare me for the actual ones.