DSP Firmware Engineer Interview Questions

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“Write a c functions that takes two bit indices and an int, and reverses the bits in the int between the two indices.”

“Given 2 32 bit numbers, how do u multiply them using 8bit multipliers?”

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“qtns abt OFDM, qtns abt cyclic prefix, qtns abt wideband channel, qtns abt block convolution: overlap save”

“How to estimate 16QAM threshold”

“Given 25 red balls & 25 blue balls. Arrange them in 2 bowls such that when a ball is picked randomly from one of bowls, the probability of picking red ball is maximum??”

“How to estimate the DP SNR?”

“Swap two numbers without using a temporary variable”

“Describe why OFDM works as well as it does. Describe QAM modulation and the effects of channel offsets”

“questions were pretty simple like create a linked list of n nodes, some puzzles”

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