Packages will be given according to the experience one has
The exam will have English, Numerical Ability and Reasoning Ability test
How you prepare for this. You can try various books on English language that prepares for entrance test similarly for Numerical Ability and Reasoning Ability
The HDFC bank did not announce the mock test so that you could have little knowledge of this pattern.
What option available for candidates online
There are various platform on you tube that gives you knowledge to prepare other you can also try for SATHEE portal for preparation