IC basics will consist of all the IC problems based on fabrication and other basic processes.
This portion of MCQs seems to be of more interest in last few years. A good number of problems appear in GATE examination. The problems that appear in GATE are more on basics of the MOSFET device. Some important relations which are related to device concepts are also important. Try to understand the applicability of the related equations and their limitations. Since the topic is relatively recent, but good books are available. You can refer to the books given in the list of books for GATE EC.