Plexus Software Engineer interview questions

I applied online and received response for first HR interview. The interveiw was basic: motivation, intention, expectations etc. After this, I was invited to attend an online second (techical) interview. The interview was held by Hiring Manager and one software engineer in which they asked basic C programming questions. I was also asked to look at a sample code and identify errors/issues in it. In the third stage, I was invited onsite for one full day (5-6 hours) in which I was supposed to give a presentation (of experience and achievements so far), and to attend a few more interviews. The process was okay and one of the technical interview involved live coding.

Tuve en primer una llamada telefónica y después una entrevista técnica. Salí con buenas sensaciones de la entrevista pero, pasaron los días, y ningún feedback. Tuve que preguntar por el feedback y me respondieron que el proceso se ha quedado en "Stand by". Abrir una vacante, hacerle perder el tiempo a candidatos, y después que no continúe el proceso, en mi opinión, denota poca profesionalidad y confianza.