Infosys Software Engineer Java Developer interview questions

1. Questions were based on design, cache design, 2. Indexing in Sql 3.An array is given, 0,0,0,0,1,1,1,1.... Print the index of 1 when came first time or, if array is 1,1,1,1,0,0,0,0.... Write code to print the index of 0 appeared 1st time in the array

Hash map, collections.. core java