Which of the statements below are true in relation to operating system structure

Question

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

Explanation / Answer

Which of the statements below are true in relation to operating system structure?
statement one is true because

follow the link https://books.google.co.in/books?id=DuXvCF0EfDIC&lpg=SA2-PA23&ots=vkP5htna2l&dq=with%20monolithic%20systems%2C%20for%20each%20system%20call%20there%20is%20one%20service%20procedure%20that%20takes%20care%20of%20it%20and%20executes%20it&pg=SA2-PA23#v=onepage&q&f=false

statement three is also true because

A hypervisor or virtual machine monitor (VMM) is computer software, firmware or hardware that creates and runs virtual machines. A computer on which a hypervisor runs one or more virtual machines is called a host machine, and each virtual machine is called a guest machine. The hypervisor presents the guest operating systems with a virtual operating platform and manages the execution of the guest operating systems. Multiple instances of a variety of operating systems may share the virtualized hardware resources: for example, Linux, Windows, and macOS instances can all run on a single physical x86 machine. This contrasts with operating-system-level virtualization, where all instances (usually called containers) must share a single kernel, though the guest operating systems can differ in user space, such as different Linux distributions with the same kernel.

so

Answer is i,ii,iii

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