Data Storage Technologies and Networks

Question 1
If read and write performance is the only criterion, which would you choose?
Select one:
 RAID 0
 RAID 1 
 RAID 5
 RAID 50
Feedback
Your answer is incorrect.
The correct answer is: RAID 0


Question 2
Question text
Which of the following RAID levels guarantees double disk failure protection?
Select one:
 Raid 5
 Raid 6 
 Raid 0+1
 Raid 1+0
Feedback
Your answer is correct.
The correct answer is: Raid 6


Question 3
Question text
What is the capacity of the disk with 5 platters. 2 surfaces per platter, 20000 tracks per surface, 300 sectors per track and 512 bytes per sector
Select one:
 30.72GB 
 24.40GB
 21.40GB
 15.16GB
Feedback
Your answer is correct.
The correct answer is: 30.72GB

Question 4
Question text
Identify a network file protocol in the below mentioned set
Select one:
 FC
 CIFS
 SCSI 
 NAS


The correct answer is: CIFS


Question 5
How many disk failure can disk failure can be withstood by RAID 6?
Select one:
 1
 2 
 3
 4
Feedback
Your answer is correct.
The correct answer is: 2


Question 6
Question text
What is the memory bandwidth requirement of a machine executing 4*105 instructions per second, average instruction size of 3.8 bits and 7.2 bits of average operand size per instruction?
Select one:
 1.52 Mbps
 0.72 Mbps
 2.88 Mbps 
 4.4 Mbps
The correct answer is: 4.4 Mbps


Question 7

Question text
Which version of NFS Mandates strong security
Select one:
 NFSv1
 NFSv2 
 NFSv3
 NFSv4
The correct answer is: NFSv4


Question 8
What level of RAID supported by some NAS systems?
Select one:
 RAID-6
 RAID-10
 RAID-5 
 None
Feedback
Your answer is incorrect.
The correct answer is: RAID-6


Question 9
Estimate the sustained transfer rate of a drive if disk drive spins at 7200 RPM, has a sector size of 512 bytes, and holds 160 sectors per track around
Select one:
 9400 KB/s
 9600 KB/s
 9800 KB/s 
 10000 KB/s
Feedback
Your answer is correct.
The correct answer is: 9800 KB/s
Question 10
Best I/O Technique for low volume data transfer
Select one:
 Polling
 Interrupt Driven 
 DMA
 b and c
Feedback
Your answer is correct.
The correct answer is: Interrupt Driven


Question 11
Which storage Technology uses low level disk drive access commands like READ block, WRITE block and READ capacity
Select one:
 NAS
 SAN
 DAS 
 All the above
Feedback
Your answer is incorrect.
The correct answer is: SAN


Question 12
If average latency is 2.99 ms and average seeks time is 4.7 ms, then IOPS of the disk will be?
Select one:
 129
 130 
 128
 131
Feedback
Your answer is correct.
The correct answer is: 130


Question 13
Wear leveling affects
Select one:
 Hard disk
 Flash
 Optical storage 
 RAM
The correct answer is: Flash


Question 14
PCI Bus Lines contains
Select one:
 Control Lines
 Data Lines
 Address Lines 
 All the above
The correct answer is: All the above


Question 15
A hard disk has 63 sectors per track, 10 platters each with 2 recording surfaces and 1000 cylinders. The address of a sector is given as a triple (c, h, s), where c is the cylinder number, h is the surface number and s is the sector number. Thus, the 0th sector is addressed as (0, 0, 0), the 1st sector as (0, 0, 1), and so on
The address <400,16,39> corresponds to sector number:

Select one:
 505035
 505036 
 505037
 505047
The correct answer is: 505037


Question 16
How do we meet memory bandwidth requirements?

Select one:
 L1 cache, L2 cache and DRAM
 Direct Attached Storage and Network Storage
 Archival Storage 
 All the above
The correct answer is: All the above


Question 17
Which option is dedicated for file sharing?
Select one:
 bimodal
 network attached storage
 stealth 
 storage area network
The correct answer is: network attached storage


Question 18
A certain hard disk has 16 cylinders, 480 tracks per cylinder, 32 sectors per track, and 512 bytes per sector. What is its storage capacity?
Select one:
 125,829,120 bytes
 125,929,120 bytes 
 125,729,120 bytes

125,629,120 bytes
The correct answer is: 125,829,120 bytes


Question 19
Without power down a machine how to remove hard drives?
Select one:
 fast booting
 hot swapping
 drive duplexing 
 drive mirroring
The correct answer is: hot swapping


Question 20
Do iSCSI storage mandatory to required switch?
Select one:
 Yes
 No
 None 
 a & b both
The correct answer is: No