After my technical phone interview, which took almost a month, I received an invitation for the on-site interview in San Diego, CA. This was followed by interview dates, my choice, confirmation, and procedures for purchasing airline tickets and hotel reservations.

I received the interviewers' names two days before the scheduled date. Seven professionals interviewed me, starting with HR, followed by individuals from different departments (technologies) specializing in modem testing. HR provided the interview schedule and locations of the interviewers.

The interview lasted for 7 hours, with each session being 45 minutes. The remaining time was allocated for transport (shuttle service available) between buildings within the Qualcomm campus area and lunch. Qualcomm covered all travel expenses.

Overall, it was a good experience having multiple interviews, and you can also learn a lot. "Practice makes man perfect." All the questions were based on my resume and experience. Make sure you are perfect on the concepts mentioned in your resume.

Day-to-day activities in your previous projects?

Most critical issues faced and how were they resolved in your previous projects?

Channel Mapping from R99?

Initial UE Network acquisition process after power ON?

Compress mode?

Handoffs?

Calculate UARFCN?

Call Flow?

RSCP & EcNo?

How to reduce pilot pollution?

SNR?

Power Control?

How to calculate Pathloss?

Blind Hanover?

Reasons for High RSSI alarms on Node B and how to resolve?

Reasons for Low throughput on UL & DL?

BLER?

Tilt Recommendations?

Coverage relations?

Layer Management Strategy?

Modulation techniques?

Multipath & RAKE receiver?

All UE Events like e1a?

UE Categories?

Idle mode behaviour & channel used?

Paging?

DRX Cycle?

How many times UE measurement reports are sent to CN?

OFDMA?

Difference between WCDMA & LTE?