Best resource to practice among all

Receiving passing score in the C1000-166 certification exam would have made me yet another aspirant. But i wanted to do something special in life, so i went for IBM Cloud Professional Developer v6 Officer mock tests which are awesome seriously. They prepared me for the worst. It was like walking on hot coal on a daily basis. God! If i had not opted for these, then i would have failed the exam. But today i hold the certification in my hand and feel proud to be at a place where i am.