With 8+ years of experience in IT, I have faced many interviews. I have done many technical interviews myself, but the one with Well Fargo is by far the worst!! The interviewer was totally unprofessional. I come from an operations background and have done several automations, in particular with shell, Ansible, and Puppet. I didn't ever have to deal with 'counting the number of times a word is repeated in a big string'. I didn't have to deal with an array or string in the first place. The interviewer judged me, stating I am not even a computer software engineer for not knowing this. In my whole career, no one has ever judged or passed such horrible, rude remarks on me. Is this the way you speak to a person who attends an interview??

What is a serial plugin?