Community Medicine is a rather large yet simple subject to understand. It's a daunting task to read Preventive and Social Medicine by K. Park but it's an essential read.

You'll need at least 2–3 readings of the most frequently asked topics in your University examination to get a confident grip of the subject.

Topics like epidemiology, nutrition, demographics, health care systems, health economics, preventive obstetrics and pediatrics, national health programs, screening of disease and biostatistics are some of the important topics that are frequently asked and they are quite volatile.

Make sure not go too deep into reading park before your examination. Highlight the important points or make your own notes or if the time isnt on your side, just do the last 10 years solved questions. You'll do fine with that too.

Apart from that, Community Medicine is a relatively easy subject to read and understand.

All the best! Do well in your exam.