Cortera Software Engineer NET interview questions

there 3 round of interview 1- technical & aptitude written 2- face to face technical 3- HR ( sometime one telephonic round) First Round: Written test 90min. 3program = - Factorial Without * or Fact function - Reverse of string without library function - Find and count word in a string some aptitude, - Clock, - Time distance - calendar - Profile database connection coding & some questions on ADO.NET