Qualcomm interview questions

Phone Interview 2: Questions related to my thesis... C questions..... How to declare unknown data type in C..........Diff b/w switch and if else......what char is declared for pointer..... pass by value and pass by reference...... debug small code....... Processor Questions...... If der is a low-end microprocessor with 20 pins....How and what pins do you assign??? Importance of each pin(such as i/p,o/p and memoy)....Memory handling insider processor .... Intuitive Question on test-criteria based on mobilr base station situation..........