Hey sabarishwar,
Not so sure what your question is. What hotkeys you have depends of what hotkey map you use.
The list of the standard Bforartists hotkeys can be found here: https://bforartists.de/data/manual/2.1%20Bforartists%20Standard%20Keymap.pdf
The important hotkeys addon shows you the most important hotkeys right in the viewport.
And this video here goes through the basic navigation hotkeys:
Hope that helps 
Kind regards
Reiner