IP Unity Glenayre interview questions

I was called on site for an interview after a brief telephonic screening by a consultancy. It was scheduled as an one-one multiple technical interviews on the same day. I was surprised when I noticed more people pouring in to interview for the same position at the same time I was scheduled for. I was asked to wait after my first round for another round. Later the HR asked me to leave and said I would receive further communication regarding a second interview. But no response from the company/consultancy.

I have attended the first round of interview. They expect the resource to be a full stack developer and sql also. Started from basics in Java till multithreading and scenario based questions