Questions will be mainly related to C language and protocols. So you need to be very good at communication protocols such as I2C, SPI, UART, and maybe USB, and some memory-related things.
If you have worked on an SoC, then be good at the architecture of the SoC.
Pointers
The following metrics were computed from 1 interview experience for the Qualcomm Validatoin Engineer role in Bengaluru, Karnataka.
Qualcomm's interview process for their Validatoin Engineer roles in Bengaluru, Karnataka is extremely selective, failing the vast majority of engineers.
Candidates reported having very good feelings for Qualcomm's Validatoin Engineer interview process in Bengaluru, Karnataka.