SanDisk Firmware Engineer interview questions

Applied through college placements First round consisted of 30 questions to be answererd in 40 minutes. Aptitude was mandatory Easy aptitude questions . Other sections were programming , systems and digital electronics. Could choose 2 sections out of 3 to answer. Interview rounds consisted more of kernel based questions, OS, CO etc 2 technical interviews , one hr.

There were totally 4 rounds of interview 1st round: There were 3 sections. Written Test. (There was negative marking-0.25) 1st sec was aptitude(10 ques-MCQ): Refer RS Agarwal. 2nd sec was C programming(10 ques MCQ and 2 Programming): MCQ were very basic C question. The 1st programming question was: if(<condition>) printf("Hello"); else printf("World"); Give a condition such that Hello World is printed. Answer: <condition> = (printf("Hello")&&0) 2nd Programming question: Write a program to read a file and search for a string 3rd Sec was about hardware(I couldn't answer all because my stream was Information Technology) 2nd round: It was the 1st technical interview. He asked me to explain about the project. Asked questions on my project. Asked me to write a C code to send bit by bit via GPIO. He asked me a simple aptitude kind of question(Just to see the way you think) 3rd round:It was the 2nd technical interview. He asked me to tell about volatile keyword in c. Then he asked me to declare array of function pointer. He then asked me how interrupts work? 4th round: It was HR interview. He asked me to tell something that is not there in my resume. He asked to tell about myself. How many companies did i sit before this and why was i rejected?