Bootstrap circuit ?? for switching N-channel Mosfet (IRFZ44N)

Thanks a lot for the replies, but still my original question seems to be unanswered.

  1. mosfet switching on and off as the arduino or is inverted.
  2. is this circuit correct or any modifications are required.
  3. explaination to the working of the bootstrap circuit for mosfet driving

herbschwarz:
First, this is not a half-bridge circuit: it is a high side driver.

This is not my design or the wordings, i have taken it from another discussion on this forum and have attached the link to the original thread also.