Computer Hardware 31

C H A P T E R

04
COMPUTER
MEMORY
Computer memory stores data and instructions The two categories of RAM are as follows
required during the processing of data and output (i) Dynamic RAM (DRAM) It is made up of
results. It also relates to many devices that are memory cells where each cell is composed
responsible for storing data on a temporary or a of one capacitor and one transistor.
permanent basis. DRAM must be refreshed continually to
store information. DRAM is slower, less
Types of Memory expensive and occupies less space on the
computer’s motherboard.
Primary Memory
The memory unit that communicates directly with (ii) Static RAM (SRAM) It retains the data
the CPU is called main memory or internal memory as long as power is provided to the
or primary memory. memory chip.
SRAM needs not be refreshed periodically.
The primary memory allows the computer to store
data for immediate manipulation and to keep track It uses multiple transistors for each
of what is currently being processed. It has limited memory cell. It does not use capacitor.
storage capacity. SRAM is often used cache memory due to
its high speed. SRAM is more expensive
Main memory is volatile in nature, it means that
when the power is turned OFF, the contents of this and faster than DRAM.
memory are lost forever. 2. Read Only Memory (ROM) It is also known
Primary memory can be further classified in two as non-volatile memory or permanent storage. It
types which are as follows does not lose its contents when the power is
1. Random Access Memory (RAM) It is also switched OFF.
known as read/write memory, that allows CPU ROM can written data and instructions to it
to read as well as write data and instructions only one time. Once a ROM chip is
into it. programmed at the time of manufacturing, it
RAM is used for the temporary storage of input cannot be reprogrammed or rewritten. So, it
data, output data and intermediate results. has only read capability, not write.
32 Learn, Revise & Practice ~ Computer Awareness

The three categories of ROM are as follows

Secondary Memory/ Storage
(i) Programmable ROM (PROM) It is also This memory stores much larger amount of data
non-volatile in nature. Once a PROM has and information for extended periods of time. Data
been programmed, its content can never in secondary memory cannot be processed directly
be changed. It is one-time programmable by the CPU, it must first be copied into primary
device. This type of memory is found in memory, i.e. RAM. It is the slower and cheaper
video game consoles, mobile phones, form of memory than primary memory.
implantable medical devices and high
definition multimedia interfaces. Secondary storage is used to store data and
programs when they are not being processed. It is
(ii) Erasable Programmable ROM (EPROM)
also non-volatile in nature. Due to this, the data
It is similar to PROM, but it can be erased
remain in the secondary storage as long as it is not
by exposure to strong ultraviolet light,
overwritten or deleted by the user. It is a permanent
then rewritten. So, it is also known as
storage.
Ultraviolet Erasable Programmable ROM
(UVEPROM). Secondary memory devices include following types of
memory
(iii) Electrically Erasable Programmable
1. Magnetic Storage It is the manipulation of
ROM (EEPROM) It is similar to EPROM,
magnetic fields on a medium in order to record
but it can be erased electrically, then
audio, video or other data. It includes hard disk
rewritten electrically and the burning
drive, floppy disk and magnetic tape, which are
process is reversible by exposure to
described below
electric pulses. It is the most flexible type
of ROM and is now commonly used for (i) Hard Disk Drive (HDD) It is a non-volatile
holding BIOS. and random access digital data storage
Note BIOS stands for Basic Input/Output System.
device. HDD is a data storage device used for
storing and retrieving digital information
Some Special Memories using rotating disks (platters) coated with
Apart from above memories, there are also some magnetic material.
other memories that help to primary memory, All programs of a computer are installed in
which are as follows hard disk. It is a fixed disk, i.e. cannot be
removed from the drive. It consists of a
Cache Memory spindle that holds non-magnetic flat
It is a storage buffer that stores the data which is circular disks called platters, which hold the
used more often, temporarily and makes it available recorded data. Each platter requires two
to CPU at a fast rate. Cache memory is a very high read/write heads, that are used to write and
speed memory placed in between RAM and CPU. It read information from a platter.
increases the speed of processing. All the read/write heads are attached to a
Flash Memory single access arm so that they cannot move
independently.
It is a kind of semiconductor based non-volatile
rewritable memory, used in digital camera, mobile
phone, printer, etc.
Sectors Tracks
Virtual Memory
It is a technique that allows the execution of
processes that are not completely in main memory.
One major advantage of this memory is that
programs can be larger than main memory. Tracks and Sectors
Computer Hardware 33
The information is recorded in bands; each storage device. DVDs offer higher storage
band of information is called a track. Each capacity than CDs while having the same
platter has the same number of tracks and a dimensions.
track location that cuts across all platters is Depending upon the disc type, DVD can
called a cylinder. The tracks are divided into store several gigabytes of data (4.7 GB-17.08
pie-shaped sections known as sectors. GB). DVDs are primarily used to store music
(ii) Floppy Disk (Diskette) Floppy disk is round or movies and can be played back on your
in shape and a thin plastic disk coated with television or computer too. They are not
iron oxide. It is used to store data but it can rewritable storage device.
store small amount of data and it is slower to DVDs come in three varieties are as follows
access than hard disks. DVD-ROM (Digital Video Disc-Read Only
Data is retrieved or recorded on the surface Memory)
of the disk through a slot on the envelope. DVD-R (DVD-Recordable)
Floppy disk is removable from the drive.
DVD-RW (DVD-Re-Writable)
Floppy disk is available in three sizes; 8 inch,
1 1 (iii) Blu-ray Disc It is an optical disc storage
5 inch and 3 inch. medium designed to re-capture the data
4 2
normally in DVD format. Blu-ray disc (BD)
(iii) Magnetic Tape These tapes are made of a
contains 25 GB (23.31 GB) per layer space.
plastic film-type material coated with
magnetic materials to store data The name Blu-ray disc refers to the blue
permanently. Data can be read as well as laser used to read the disc, which allows
write. It is usually 12.5 mm to 25 mm wide information to be stored at a greater density
and 500 m to 1200 m long. than the longer- wavelength red laser used
in DVDs.
Magnetic tapes hold the maximum data,
Blu-ray can hold almost 5 times more data
which can be accessed sequentially. They are
than a single layer DVD.
generally used to store backup data or that
The variations in the formats are as follows
type of data, which is not frequently used or
BD-ROM (Read only)
to transfer data from one system to another.
BD-R (Recordable)
2. Optical Storage It is any storage type in which
BD-RW (Rewritable)
data is written and read with a laser. It includes
BD-RE (Rewritable)
CD, DVD and Blu-ray disc, which are described
below 3. Solid State Storage It is a type of storage
technique that employs storage devices built
(i) Compact Disc (CD) It is the most popular
using silicon microchip based storage
and the least expensive type of optical disc.
architecture. It includes pen/flash drive,
A CD is capable of being used as a data
memory card, which are described below
storage device alongwith storing of digital
audio. (i) Pen/Thumb Drive It is also known as flash
drive. A flash drive is a data storage device
CD is categorised into three main types as follows
that consists of flash memory (key memory)
CD-ROM (Compact Disc-Read Only with a portable USB (Universal Serial Bus)
Memory) interface. USB flash drives are typically
CD-R (Compact Disc- Recordable) removable, rewritable and much smaller
CD-RW (Compact Disc- Re-Writable) than a floppy disk.
(ii) Digital Video Disc (DVD) It is also known Today, flash drives are available in various
as Super Density Disc (SDD) or Digital storage capacities as 256MB, 512MB, 1GB,
Versatile Disc (DVD). It is an optical disc 4GB, 16GB upto 64 GB. They are widely used
34 Learn, Revise & Practice ~ Computer Awareness

as an easy and small medium to transfer and minimising IT infrastructure costs and act as a
store the information from the computers. good option for handling peak loads on the
(ii) Memory Cards These are the data storage local infrastructure. A public cloud is meant to
devices in chip shaped. They are commonly serve multiple users, not a single customer.
used in many electronic devices, including 2. Private Cloud These are distributed systems
digital cameras, mobile phones, laptop, that work on a private infrastructure and
computers. They are small, re-recordable, providing the users with dynamic provisioning
easily portable and very light weighted. of computing resources.
Basic Units of Memory Measurements 3. Hybrid Cloud It is a heterogeneous
1 Bit = Binary Digit (0 or 1) distributed system resulted by combining
= 1 Nibble facilities of public cloud and private cloud. For
4 Bits
= 1 Byte = 2 Nibble
this reason, they are also called heterogeneous
8 Bits
clouds.
1024 Bytes = 1 KB (KiloByte)
= 1 MB (MegaByte)
1024 KB Cloud Computing Services
1024 MB = 1 GB(GigaByte)
1. Infrastructure as a Service (IaaS) It is a cloud
1024 GB = 1 TB(TeraByte) computing model where virtualised
1024 TB = 1 PB(PetaByte) infrastructure is offered to and managed for
1024 PB = 1 EB(ExaByte) business by external cloud providers. Some
1024 EB = 1 ZB(ZettaByte) examples of the wide usage of IaaS are
1024 ZB = 1 YB (YottaByte) automated policy-driven operations such as
= 1 (BrontoByte) backup, recovery, etc.
1024 YB
1024 BB = 1 (GeopByte) 2. Software as a Service (SaaS) It is a method for
delivering software applications over the
Note Bit is the smallest memory measurement unit.
GeopByte is the highest memory measurement unit. Internet as per the demand and on a
A byte can represent 256 (0-255 or 2 8) distinct subscription basis. Most common examples of
values. SaaS are Microsoft Office 360, Oracle CRM,
Marketo, etc.
Cloud Computing 3. Platform as a Service (PaaS) It refers to the
It is a general term for anything that involves supply an on-demand environment for
hosted services over the internet. The name comes developing, testing, delivering and managing
from the use of clouds as an abstraction for the software applications. Some key players
complex infrastructure it contains in system offering PaaS are Bluemix, CloudBees,
diagrams.
Salesforce.com, etc.
It entrusts services with a user’s data, software and
computation over a network. It has considerable Several Next Generation
overlap with Software as a Service (SaaS).
Memories
Types of Cloud Deployments FeFET or FeRAM A next generation ferroelectric
memory.
The three types of cloud deployments categorised
based on an organisation’s ability to manage and Nanotube RAM In R & D for years, nanotube
secure assets are as follows RAM is targeted to displace DRAM. Others are
developing carbon nanotubes and next
1. Public Cloud These are managed by third
generation memories on the same device.
party which provides cloud services over the
Internet to public. They offer solutions for Phase Change Memory After shipping the first
Computer Hardware 35
PCM devices, Intel is readying a new version.
Others may enter the PCM market. Tit-Bits
ReRAM Future versions are positioned for AI ■ The rate at which data is written to disc or read
apps. from disc is called data transfer rate.
Spin Orbit Torque-MRAM (SOT-MRAM) A next ■ Root directory is the main folder of disk. It
generation MRAM targeted to replace SRAM. contains information about all folders on the disk.

QUESTION BANK
1. …… stores data and instructions required 8. Which of the following is a correct
during the processing of data and output definition of volatile memory?
results. (1) It does retain its contents at high temperature
(1) Memory (2) Architecture (2) It is to be kept in air-tight box
(3) Input (4) Output (3) It loses its content on failure of power supply
(4) It does not lose its content on failure of power
2. Where is data saved permanently? supply
(1) Memory (2) Storage
(3) CPU (4) Printer 9. Cache and main memory will not be able to
hold their contents when the power is OFF.
3. Where are programs and data to be used by They are
the computer available? [SSC FCI 2012] (1) dynamic (2) static
(1) Processing unit (2) Output (3) volatile (4) non-volatile
(3) Storage (4) Input 10. In computer terminology, what is the full
4. How many types of memory does a form of RAM? [SSC CGL 2018]
computer have? (1) Random Access Memory
(1) Four (2) Eight (2) Repeated Access Memory
(3) One (4) Two (3) Rapid Access Memory
5. Primary storage is .......... as compared to (4) Regular Access Memory
secondary storage. 11. …… memory in a computer is where
(1) slow and inexpensive information is temporarily stored while it is
(2) fast and inexpensive being accessed or worked on by the
(3) fast and expensive processor. [IBPS RRB PO 2017]
(4) slow and expensive (1) Logical (2) Secondary
6. The key feature(s) of internal memory is/are (3) ROM (4) RAM
(5) Cache
(1) limited storage capacity
(2) temporary storage 12. Why RAM is so called? [IBPS Clerk 2015]
(3) fast access and high cost (1) Because it is read and write memory
(4) All of the above (2) Because it is a volatile memory
7. The two kinds of main memory are (3) Because it can be selected directly for storing
(1) ROM and RAM and retrieving data and instructions of any
(2) primary and secondary location of chip
(3) floppy disk and hard disk (4) Because it is a non-volatile memory
(4) direct and sequential (5) None of the above
36 Learn, Revise & Practice ~ Computer Awareness

13. Which of the following is not true about 21. A disc’s content that is recorded at the time
RAM? [IBPS PO 2015, IBPS Clerk 2014] of manufacture and cannot be changed or
(1) RAM is the same as hard disk storage erased by the user is [IBPS Clerk 2013]
(2) RAM is a temporary storage area (1) memory only (2) write only
(3) RAM is volatile (3) once only (4) run only
(4) RAM is a primary memory (5) read only
(5) Other than those given as options
22. In the field of Information and
14. Virtual memory allocates hard disk space to Communication Technology (ICT), what is
supplement the immediate, functional the full form of EEPROM? [SSC CGL 2018]
memory capacity of [SBI PO 2014]
(1) Electrically Erasable Programmable Read
(1) ROM (2) EPROM Only Memory
(3) the registers (4) extended memory (2) Electrically Efficient Portable Read Only
(5) RAM Memory
15. Storage that retains its data after the power (3) Electrically Efficient Programmable Read
is turned OFF is referred to as Only Memory
[SBI Clerk 2009] (4) Enhanced Electrical Portable Read Only
Memory
(1) volatile storage (2) non-volatile storage
(3) sequential storage (4) direct storage 23. The difference between memory and
16. The advantage of DRAM is storage is that memory is …… and storage is
(1) it is cheaper than SRAM ……… . [IBPS Clerk 2015]
(2) it can store data more than that of SRAM (1) temporary; permanent
(3) it is faster than SRAM (2) permanent; temporary
(4) data can be erased easily from it as compared (3) slow; fast
to SRAM (4) non-volatile; volatile
(5) None of the above
17. Which of the following stores data
permanently in a computer? [SSC CGL 2017] 24. The …… acts as a buffer between the CPU
(1) ALU (2) Cache memory and the main memory. [UPSSSC 2018]
(3) RAM (4) ROM (1) primary memory (2) cache memory
18. Permanent instructions that the computer use (3) secondary memory (4) RAM
when it is turned ON and that cannot be 25. Which of the following is a very high speed
changed by other instructions are contained semiconductor memory which can speed up
in [UPSSSC 2016] the CPU? [SSC CHSL 2019]

(1) ROM (2) RAM (3) ALU (4) SRAM (1) Secondary memory (2) Main memory
(3) Primary memory (4) Cache memory
19. When you first turn on a computer, the
CPU is preset to execute instructions stored 26. What is the term used for temporarily
in the [IBPS PO 2015] stored data? [UPSSSC 2019]
(1) RAM (2) flash memory (1) Miscellaneous data (2) Cache data
(3) ROM (4) CD-ROM (3) Picked data (4) Tempo data
(5) ALU 27. ......... is having more memory addresses than
20. What is the full form of PROM? are physically available. [SBI PO 2014]
[SSC CHSL 2019] (1) Virtual memory
(1) Programmable Read Only Memory (2) System software
(2) Program Read Output Memory (3) Application software
(3) Program Read Only Memory (4) RAM
(4) Primary Read Only Memory (5) Vertical memory
Computer Hardware 37

28. ……… is the ability of a device to ‘jump’ directly 35. The storage device used to compensate for
to the requested data. the difference in rates of flow of data from
(1) Sequential access one device to another is termed as
(2) Random access (1) chip (2) channel
(3) Quick access (3) floppy (4) buffer
(4) All of the above 36. Which of the following is the magnetic
29. The ……… is the amount of data that a storage device?
storage device can move from the storage to (1) Hard disk (2) Compact disc
the computer per second. (3) Audio tapes (4) All of these
(1) data migration rate 37. Hard disk devices are considered ……
(2) data digitising rate storage. [SBI Clerk 2014]
(3) data transfer rate
(1) flash (2) temporary
(4) data access rate
(3) worthless (4) non-volatile
30. The main directory of a disk is called the (5) non-permanent
……… directory. [IBPS PO 2015]
38. The thick, rigid metal plotters that are
(1) network
capable of retrieving information at a high
(2) folder
(3) root
rate of speed are known as [SBI Clerk 2014]
(4) other than those given as options (1) hard disk (2) SAN
(5) program (3) soft disk (4) flash memory
(5) None of these
31. The …… indicates how much data a particular
storage medium can hold. [IBPS Clerk 2013] 39. Hard drive is used to store
[IBPS Clerk Mains 2017]
(1) storage (2) access
(3) capacity (4) memory (1) volatile data (2) non-volatile data
(5) None of these (3) permanent data (4) temporary data
(5) intermediate data
32. The secondary storage devices can only
store data but they cannot perform 40. The hard drive is normally located
(1) arithmetic operations (1) next to the printer [SBI PO 2014]
(2) logic operations (2) plugged into the back of the computer
(3) underneath the monitor
(3) fetch operations
(4) on top of the CD-ROM
(4) All of the above (5) inside the system base unit
33. Where do you save the data that, your data 41. Data on a floppy disk is recorded in rings
will remain intact even when the computer called
is turned OFF? (1) sectors (2) ringers
(1) RAM (3) rounders (4) tracks
(2) Motherboard
42. Which of the following is/are example(s) of
(3) Secondary storage device
magnetic storage media?
(4) Primary storage device
(1) Zip disk (2) CD-ROM
34. The term ……… refers to data storage systems (3) Floppy disk (4) DVD
that make it possible for a computer or (5) Both (1) and (3)
electronic device to store and retrieve data. 43. Floppy disks are organised as
(1) retrieval technology (1) files
(2) input technology (2) heads and folders
(3) output technology (3) tracks and sectors
(4) storage technology (4) All of the above
38 Learn, Revise & Practice ~ Computer Awareness

44. The capacity of 3.5 inch floppy disk is 52. On a CD-RW, you can
(1) 1.40 MB (2) 1.44 GB (1) read and write information
(3) 1.40 GB (4) 1.44 MB (2) only read information
45. The most common storage device for the (3) only write information
personal computer is the [SBI Clerk 2014] (4) read, write and rewrite information
(1) floppy disk 53. Which of the following are advantages of
(2) USB personal computer CD-ROM as a storage media?
(3) mainframe [RBI Grade B 2014]
(4) a laptop
(5) None of these (1) CD-ROM is an inexpensive way to store large
amount of data and information
46. Which of the following has the smallest (2) CD-ROM discs retrieve data and information
storage capacity? [IBPS Clerk 2015] more quickly than magnetic disks
(1) Zip disk (2) Hard disk (3) CD-ROMs make less errors than magnetic media
(3) Floppy disk (4) Data cartridge (4) All of the above
(5) CD (5) None of the above
47. FDD stands for 54. Which media has the ability to have
[SSC, CGL 2018, IBPS Clerk 2015] data/information stored (written) on them by
(1) Floppy Drive Detector users more than once? [RBI Grade B 2014]
(2) Floppy Drive Demodulator (1) CD-R discs
(3) Floppy Disk Drive (2) CD-RW discs
(4) Floppy Demodulator Disc (3) Zip discs
(5) None of the above (4) Optical discs
(5) CD-RW discs and Zip discs
48. ......... is the process of dividing the disc into
tracks and sectors. 55. What is the difference between a CD-ROM
[SBI PO 2015, IBPS Clerk Mains 2017] and CD-RW? [IBPS PO 2015]
(1) Tracking (2) Formatting (1) They are the same—just two different terms
(3) Crashing (4) Allotting used by different manufactures.
(5) None of these (2) A CD-ROM can be written to and a CD-RW
cannot.
49. Data on a floppy disk was recorded in rings
(3) Other than those given as options
called [IBPS RRB PO 2017]
(4) A CD-ROM holds more information than a
(1) flip (2) ringers CD-RW.
(3) rounders (4) fields (5) A CD-RW can be written to but a CD-ROM
(5) segments can only be read from.
50. Magnetic tape is not practical for 56. Compact discs that can store approximately
applications where data must be quickly 650-800 MB of data or 74-80 min of music
recalled because tape is are [SBI Clerk 2015]
(1) a random access medium (1) zip discs (2) CD-ROM
(2) a sequential access medium (3) video cards (4) pressing machines
(3) a read only medium (5) floppy diskettes
(4) fragile and easily damaged 57. A flat metallic disk that contains a large
51. Which of the following can hold maximum amount of permanently stored information
data? read optically, is called a
(1) Optical disc (2) Floppy disk (1) monitor (2) ALU
(3) Magnetic disk (4) Magnetic tape (3) CD-ROM (4) RAM
Computer Hardware 39

58. CD-ROM is an example of 66. Which of the following is the smallest

[RBI Grade B 2014] measure of storage? [UPSSSC 2015]
(1) input device (1) Tera byte (2) Gigabyte
(2) output device (3) Kilobyte (4) Byte
(3) Both input & output devices
67. ……… are used to measure both computer
(4) Memory device
memory (RAM) and storage capacity of
(5) None of the above
Floppy disks, CD-ROM drives and Hard
59. DVD refers to [SSC MTS 2013] drives. [SBI Clerk 2015]
(1) Digital Video Developer (1) Bytes
(2) Digital Video Device (2) Bits
(3) Digital Video Disc (3) Octal numbers
(4) None of the above (4) Hexadecimal numbers
60. A DVD is an example of a(n) (5) Binary numbers
[SBI Clerk 2014] 68. How many bits are equal to one byte ?
(1) optical device [SSC CGL 2016]
(2) output device (1) 8 (2) 6 (3) 7 (4) 2
(3) hard disk
(4) solid state storage device 69. Instructions and memory address are
(5) None of the above represented by [IBPS Clerk 2015]
(1) character code (2) binary codes
61. Which of the following discs can be read
(3) binary word (4) parity bit
only? [IBPS Clerk 2015]
(5) None of these
(1) DVD-R (2) DVD-ROM
(3) DVR-RW (4) CD-R 70. Kilo Byte equals to how many bytes?
(5) None of these [SBI Clerk 2012]
(1) 1000 (2) 1035 (3) 100 (4) 1008
62. Which is not an external storage device? (5) 1024
[SSC CGL 2016]
(1) CD-ROM (2) DVD-ROM 71. A …… is approximately a million bytes.
[SBI PO 2014]
(3) Pen drive (4) RAM
(1) giga byte (2) kilo byte
63. …… is the smallest unit of data in a (3) mega byte (4) tera byte
computer. [SSC CGL 2018] (5) None of these
(1) Gigabyte (2) Bit 72. What does the computer abbreviation ‘MB’
(3) Byte (4) Terabyte
used for? [IBPS Clerk 2014]
64. The term Bit is short for [SBI Clerk 2009] (1) Megabit (2) Millionbytes
(1) megabyte (3) Megabytes (4) Millionbit
(2) binary language (5) Microbytes
(3) binary digit 73. The amount of memory (RAM or ROM) is
(4) binary number
measured in [SBI PO 2014]
(5) None of the above
(1) bytes (2) bits
65. Which among the following is another (3) megabytes (4) megabits
name for a group of 4 bits? (5) hertz
[IBPS Clerk 2015, IBPS PO 2016] 74. How many kilobytes make a megabyte?
(1) Nibble (2) Byte [UPSSSC 2016, IBPS Clerk 2015]
(3) KiloByte (3) MegaByte (1) 128 (2) 1024 (3) 256 (4) 512
(5) PetaByte (5) 64
40 Learn, Revise & Practice ~ Computer Awareness

75. A … is approximately one billion bytes. 80. …… (HHDD) is a technology where the
[IBPS Clerk 2014, SBI PO 2015] conventional disk drive is combined with
(1) kilobyte (2) bit non-volatile flash memory, of typically
(3) gigabyte (4) megabyte 128 MB or more to cache data during
(5) None of these normal use. [SSC CGL 2017]
76. The term ‘gigabyte’ refers to [IBPS PO 2012] (1) Hyper Hard Disk Drive
(1) 1024 byte (2) Hybrid Hard Disk Drive
(2) 1024 kilobyte (3) Hybrid Helium Disk Drive
(3) 1024 megabyte (4) Hyper Helium Disk Drive
(4) 1024 gigabyte
(5) None of the above 81. Which of the following provides computing
and storage capacity services to heterogeneous
77. Which of the following is the largest unit of community of end recipients?
storage? [SBI PO 2015]
(1) Cloud computing (2) Big data
(1) GB (2) KB
(3) FutureSkills (4) Robotics
(3) MB (4) TB
(5) None of these 82. What is/are characteristics of cloud
78. Which of the following is correct sequence computing?
of smallest to largest units of storage size? (1) On demand self services
[SBI PO 2014] (2) Broad network access
(1) Petabyte, Kilobyte, Megabyte, Gigabyte, Terabyte (3) Resource pooling
(2) Kilobyte, Megabyte, Terabyte, Petabyte, (4) All of the above
Gigabyte 83. Which type of cloud deployments is used to
(3) Megabyte, Terabyte, Gigabyte, Kilobyte, Petabyte serve multiple users, not a single customer?
(4) Kilobyte, Megabyte, Petabyte, Terabyte, (1) Private cloud (2) Public cloud
Gigabyte (3) Hybrid cloud (4) None of these
(5) Kilobyte, Megabyte, Gigabyte, Terabyte, Petabyte
84. Which cloud computing services refers to
79. How many gigabytes is equal to 1 petabyte? supply on demand environment for
[SSC CGL 2016]
developing software applications?
(1) 256 (2) 512 (1) SaaS (2) AaaS
(3) 1024 (4)1024 × 1024 (3) PaaS (4) IaaS

ANSWERS
1. (1) 2. (2) 3. (3) 4. (4) 5. (5) 6. (4) 7. (1) 8. (3) 9. (3) 10. (1)
11. (4) 12. (3) 13. (1) 14. (5) 15. (2) 16. (1) 17. (4) 18. (1) 19. (3) 20. (1)
21. (5) 22. (1) 23. (1) 24. (2) 25. (4) 26. (2) 27. (1) 28. (2) 29. (2) 30. (3)
31. (3) 32. (4) 33. (3) 34. (4) 35. (4) 36. (1) 37. (4) 38. (1) 39. (3) 40. (5)
41. (4) 42. (5) 43. (3) 44. (4) 45. (1) 46. (3) 47. (3) 48. (2) 49. (5) 50. (2)
51. (4) 52. (4) 53. (1) 54. (2) 55. (1) 56. (2) 57. (3) 58. (4) 59. (3) 60. (1)
61. (2) 62. (4) 63. (2) 64. (3) 65. (1) 66. (4) 67. (1) 68. (1) 69. (2) 70. (5)
71. (3) 72. (3) 73. (3) 74. (2) 75. (3) 76. (3) 77. (4) 78. (5) 79. (4) 80. (2)
81. (1) 82. (4) 83. (2) 84. (3)