Fiserv Senior Mainframe Developer interview questions

It was a lengthy process 4 rounds took place 1. Technical test- it's easy 2. Technical interview- it was average but it continued for almost an hr, mostly logical questions 3.Managerial round- it was ohk mostly about what you have worked on and about your current project and roles and responsibilities. 4.HR discussion Lots of follow ups are needed with hiring team for each round, all process are very slow. And after clearing all the round at time of releasing the offer they put your profile on hold without any communication. Overall very bad experience.