D Question 3 4 pts The process control block is c a) A type of cache memory, i e., hardware device b) A data structure containing critical process information c) A user application program for managing file transfers C d) None of above D Question 4 4 pts Page sharing in virtual machines IVM) C a Allows multiple VM's to share common code blocks, ie., for common OS and applications b) ls used for direct messaging/communication between virtual machines IVM) c) Generally results in much higher memory usage for multiple VM instances