Which of the statements below are true in relation to operating system structure? i with monolithic systems, for each system call there is one service procedure that takes care of it and executes it ii bugs in the kernel can bring down the system instantly, therefore microkernels put as little as possible in kernel mode iii the type 3 hypervisor virtual machine runs on the bare hardware and does the multiprogramming to provide several virtual machines to the next layer up iv type 1 hypervisor virtual machine monitor has less overhead than an exokernel

i and ii

i, ii, and iii

ii, and iii

iii and iv