But no really how does printf work? Syscalls & Exceptional Control Flow

0:00 Hi! 1:02 What we have been doing in Computer Science so far? 3:44 What is a process? 4:28 What is a kernel? 5:52 What is an exception? 8:30 What is an operating system 9:57 Exceptional control flow 11:03 What the operating system is not? 12:50 User-level processes versus supervisor mode 13:34 What can the kernel do? 14:47 Kernel and CPU time for processes. 16:44 Interrupts and exception handlers 17:32 The many exceptions 17:48 How the CPU transfers control to the kernel 18:11 The 4 types of exceptions.