Top 550+ Solved Operating System (OS) MCQ Questions Answer
Q. The offset ‘d’ of the logical address must be
a. greater than segment limit
b. between 0 and segment limit
c. between 0 and the segment number
d. greater than the segment number
Q. If the offset is legal
a. it is used as a physical memory address itself
b. it is subtracted from the segment base to produce the physical memory address
c. it is added to the segment base to produce the physical memory address
d. none of the mentioned
Q. When the entries in the segment tables of two different processes point to the same physical location
a. the segments are invalid
b. the processes get blocked
c. segments are shared
d. all of the mentioned
Q. The protection bit is 0/1 based on
a. write only
b. read only
c. read – write
d. none of the mentioned
Q. If there are 32 segments, each of size 1Kb, then the logical address should have
a. 13 bits
b. 14 bits
c. 15 bits
d. 16 bits
Q. A multilevel page table is preferred in comparison to a single level page table for translating virtual address to physical address because
a. it reduces the memory access time to read or write a memory location
b. it helps to reduce the size of page table needed to implement the virtual address space of a process
c. it is required by the translation lookaside buffer
d. it helps to reduce the number of page faults in page replacement algorithms
Q. In information is recorded magnetically on platters.
a. magnetic disks
b. electrical disks
c. assemblies
d. cylinders
Q. The heads of the magnetic disk are attached to a that moves all the heads as a unit.
a. spindle
b. disk arm
c. track
d. none of the mentioned
Q. The set of tracks that are at one arm position make up a
a. magnetic disks
b. electrical disks
c. assemblies
d. cylinders
Q. The time taken to move the disk arm to the desired cylinder is called the
a. positioning time
b. random access time
c. seek time
d. rotational latency
Q. The time taken for the desired sector to rotate to the disk head is called
a. positioning time
b. random access time
c. seek time
d. rotational latency
Q. When the head damages the magnetic surface, it is known as
a. disk crash
b. head crash
c. magnetic damage
d. all of the mentioned
Q. What is the host controller?
a. controller built at the end of each disk
b. controller at the computer end of the bus
c. all of the mentioned
d. none of the mentioned
Q. controller sends the command placed into it, via messages to the controller.
a. host, host
b. disk, disk
c. host, disk
d. disk, host