Q49,p3,d14. Various storage devices used by an operating system can be arra nged as follows in increasing order of accessing speed :

(A) Magnetic tapes →magnetic disks→optical disks→electronic disks→

main memory →cache →registers

(B) Magnetic tapes →magnetic disks →electronic disks →optical disks

→main memory →cache →registers

(C) Magnetic tapes →electronic disks →magnetic disks→optical disks

→main memory →cache →registers

(D) Magnetic tapes →optical disks→magnetic disks →electronic disks →main

memory →cache→registers

 Answer D