I got to know about walkin at nimap infotech mumbai branch i don't know much about the interview process but according to walkin there was direct f2f interview totally based on java basics and some easy coding problems given to check that candidate has experience in coding(reverse string, pallindrome check). interviewer was chill and very friendly.

first they call you for the technical round in which they give four question wth different topics and ask you to write the main part of the code and your accuracy of the solution should be minimum 50%.