Please help its operating System os161

The Process Control Block (PCB) of a process is stored in: a) The process's code segment b) The process's data segment c) The interrupt vector d) The kernel's space Consider the following statements about signals i) A signal handler can be used to indicate the actions that will be taken when a specific signal is received. ii) A process can block all signals, if it wants to. iii) The default action for each received signal is to ignore the signal. a) Only i. is true; ii. and iii. are false. b) Only ii. and iii. are true; i. is false c) Only i. and ii. are true; ii. is false d) i., ii., and iii. are all true During a context-switch, the process status word (PSW) of the running process is also saved." TRUE or FALSE? "In symmetrical multiprocessing, all the CPUs will be executing the same code at all times. " TRUE or FALSE? "In Unix, the command-line interpreter (shell) is part of the operating system (kernel)." TRUE or FALSE? Typically, interrupt service routines set the dual mode bit to one before returning. TRUE or FALSE? In Unix, when a process creates a child process through the fork system call, the parent and the child will be able to update the same address space". TRUE or FALSE