I have an interview for Communications / DSP embedded.....?

Question

systems development. What are the basic concepts I need to know in those fields?

Answer 1

You need to read up - learn about integration fpga too..
DSP=Digital Signal Processors

FPGA=field-programmable gate array - an integrated circuit that is capable of being reprogrammed in the field after manufacture.

Here ya go:

http://www.dsp-fpga.com/articles/topics/embedded/

Better yet - the wiki!

http://www.webopedia.com/TERM/D/DSP.html