How to Build Topology

Dear all,
I am new to JOSM
Its very pleasure to use JOSM for creating vector layers of info for our city Rajahmundry, Andhra Pradesh, India.
I am really very happy to say that the tools (of JOSM) provided an ease of use the tools (offered with JOSM).
Here I made it ready to upload to OSM, in this regard, I made a quality check with TOPOLOGICAL errors of Line Network.

I request you all to suggest me any possibility to FIND those topological errors (miss-matched/unsnapped/over shoots/under shoots)…?


Please give us first some examples about the errors you have in mind.

Are such errors searchable via ?