- Which of the following is TRUE for two independent processes which opened the same file in a unix file system:
Select one or more:
a. A single v-node entry will be made
b. Two separate file table entry will be made
c. Only one file table entry will be made
d. Two separate v-node entries will be made
Ans : a and c
- The seek time for a hard disk drive is defined as-
Select one:
a. the time it takes to position the head at the desired sector
b. time to access the first byte of the data block
c. time required to transfer the data block
d. the time it takes to position the head at the desired track
Ans : d
- Device driver should be aware of geometry of disk if-
Select one:
a. It uses Physical addressing
b. It uses File system addressing
c. It uses LBA addressing
d. It uses CHS addressing
Ans : d
- Which of the following information is not maintained by the inode structure of a file?
Select one:
a. file mode
b. file size
c. reference count
d. file name
Ans : a
- Consider a multi zone disk with three zones. Outer zone have 24 sectors per track, inner zone have 16 sectors per track and innermost zone have 8 sectors per track. Which of the following statement is TRUE for the disk geometry mentioned here?
Select one:
a. Outer zone tracks perform same as the inner most zone tracks
b. Outer zone tracks perform up-to two times faster as the inner most zone tracks
c. Inner most zone tracks perform up-to three times faster as the outer zone tracks
d. Outer zone tracks perform up-to three times faster as the inner most zone tracks
Ans : a
- Which of the following statement is TRUE for Solid State Storage Devices (SSDs):
Select one:
a. Gives similar performance for both Sequential and Random accesses
b. Can not say certainly
c. Gives better performance for Sequential access as compared to Random access
d. Gives better performance for Random Access as compared to Sequential access
Ans : a
- Which of the following is TRUE for disk drive performance measure
Select one:
a. MBps is best at measuring random workloads
b. IOPS is best at measuring sequential workloads
c. Usually cache miss IOPS rating is higher than cache hit IOPS ratings for a disk drive
d. IOPS rating of a disk drive depends upon cache hit ratio and IO request size
Ans : d
- Which of the following shows correct relationship between different RAID levels in terms of fault tolerance.
Select one:
a. RAID 0 < RAID 10 < RAID 5
b. RAID 10 < RAID 1 < RAID 0
c. RAID 0 < RAID 1 < RAID 10
d. RAID 10 < RAID 4 < RAID 0
Ans : c
- Usually device driver is a part of-
Select one:
a. Operating System User space
b. Disk Controller on the Disk
c. Operating System Kernel
d. Application Program
Ans : b
- What is the average rotational latency of a Hard Disk Drive rotates with 7200 RPM?
Select one:
a. 2.08 milli sec
b. 4.16 milli sec
c. 4.16 sec
d. 8.33 milli sec
Ans : b
- Which of the following shows correct relationship between different RAID levels in terms of write performance.
Select one:
a. RAID 10 < RAID 1 < RAID 0
b. RAID 6 < RAID 5 < RAID 1
c. RAID 0 < RAID 1 < RAID 10
d. RAID 1 < RAID 10 < RAID 0
Ans : b
- A hard disk rotates with 7200 RPM. How much time is required to read the data stored at one entire track? Assume that R/W head is positioned at the deisred track and sector
Select one:
a. 4.16 milli sec
b. 2.08 milli sec
c. 4.16 sec
d. 2.08 sec
Ans : It should be 8.33 milli sec. However it is not in option
- Which of the following is TRUE for Solid State Storage Devices?
Select one:
a. In general read performance is better than write performance
b. Disk Defragmentation can improve R/W performance
c. Smallest unit of flash memory is called as page
d. Access time depends upon the location of the data on the disk
Ans : a
- Which of the following represents the correct relationship for access time in a computer system memory hierarchy?
Select one:
a. L1 Cache < L2 Cache < Registers < Primary memory < Disk Drive
b. Registers > L1 Cache > L2 Cache > Primary memory > Disk Drive
c. L1 Cache < Registers < L2 Cache < Primary memory < Disk Drive
d. Registers < L1 Cache < L2 Cache < Primary memory < Disk Drive
Ans : d
- In UNIX operating system, system calls provides an interface between-
Select one:
a. Application and Device Drivers
b. Application and kernel
c. Kernel and Device Drivers
d. Device Driver and Hardware Devices
Ans : b
- Logical Block addressing is implemented in
Select one:
a. file system
b. disk drive
c. in operating system
d. disk drive controller
Ans : c
