Qualcomm Systems Test Engineer (LTE/Communication Systems) interview questions

? Tell me about yourself? ? Explain your project work during MTech. ? Block diagram of communication system (and explain each and every block) ? Types of channel coding and source coding (Only types, No detailed info) ? Digital Communication basics- What is QPSK ?? What is PSK ?? Diff between TDMA,CDMA,FDMA?? ? Puzzles are common like (3 bulb and 1 switch ) or (Min number of comparisons) or (3 ants at corner at equilateral triangle . Find out probability of collision??) ?And few programming puzzles