Best Embedded C interview Pdf

For C related  download the below pdf.

http://dcis.uohyd.ernet.in/~snehalmasne/stuff/placement_preparation/C%20Programming%20-%20Just%20the%20FAQs.pdf

For 8052 related  projects and some theory on touch screen  the below link is litle usefull

http://elprojects.blogspot.in/2011/07/how-4-wire-resistive-touch-screen-works.html