The interview consisted of two stages. First one will be written test round that would last for 1:30 hrs. This section will consist of RF basic and intermediate level questions. General aptitude is another section. If one clears the first round, the next round is F2F interview round. The interviewer will usually ask us to draw output voltage waveforms for given input based on diodes. For me, the person asked about diodes, Ammeter, Voltmeter output questions and basic RF. They might also ask about project.