I received a call from Qualcomm HR and scheduled an interview two days after the call.

The interview is for two hours, with each one-hour round back to back. The interview is considered moderate to tough.

Explain OFDMA technology and how subcarriers are ensured to be orthogonal.

UE Network Attach Procedure, during which the following questions were asked:

I. How does a UE perform a frequency scan? II. How does a UE decode PCI? (What synchronization signals are used?) III. RACH procedure overview. IV. UE identities in LTE (focused on GUTI and TMSI).

What are a resource element, resource block, and physical resource block?

What is the functionality of DL-SCH and what is a transport block?

What is MIMO and why is it used? How many spatial streams do LTE and 5G-NR use?

If 64QAM is used for data transmission and it yields a throughput of x, what throughput does 256QAM yield?

How does frequency affect received power? (Basically, the Friis transmission equation).

In a wireless access point network scenario, what happens to a station when it is turned on?