AppLogic Networks Software Engineer interview questions

there were two round of interview first was technical round and the second round was managerial round, the first round was more focused on testing my knowledge they asked me about dsa and computer networks in detail, in the second round they asked me system design and computer networks there main focus was on computer networks

The interview was conducted F2F on premises, In the Bengaluru office. It consisted of 4 Rounds. 1st round technical, 2nd round technical + project, 3rd round Managerial/director round, Final round HR. Even after clearing all rounds and collecting all my data for releasing offer, the HR ghosted me. It is seriously frustrating to waste an entire day of the candidate and not to send at-least a rejection mail. Please don't waste your time on this substandard company. Serious flaws in their standard.