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OCR Computer Science J277- 1.2 (Memory and Storage)

Total questions: 102

Worksheet time: 55mins

Name
Class
Date
1.
ROM stands for...
a)
Read Optical Memory
b)
Random Only Memory
c)
Read Only Memory
d)
Random Optical Memory
2.
RAM stands for ...
a)
Read Access Memory
b)
Random Application Memory
c)
Read Application Memory
d)
Random Access Memory
3.

A computer has 1000 megabytes of RAM. That is the same as ...

a)

1 Gb

b)

1000 Gb

c)

1 Kb

d)

1 Tb

4.
The characteristics of RAM are it is .....
a)
Permanent, non-volatile, not expandable and you can't write to it
b)
Temporary, volatile, expandable and you can write to it.
5.
This memory stores the data of the operating system and programs that are currently running, for access by the CPU.
a)
RAM
b)
ROM
c)
Cache memory
d)
Flash memory
6.
Why is ROM need in a computer system?
a)
It stores the 'bootstrap loader' which is needed to load the operating system.Without it, the computer wouldn't turn on.
b)
It stores the data of the operating system and programs that are currently running, for access by the CPU.
7.
This is a method of making a computer appear to have more primary memory than it has really has physically. For instance a PC might have 2Gb of RAM as primary memory, but ___ of 4Gb.  If a computer relies on this memory it will be slow.
a)
Virtual Memory
b)
Random Access Memory
c)
Read Only Memory
d)
Cache Memory
8.
Why is Virtual Memory needed in a computer system?
a)
It is used as a fast type of memory for programs currently in use to speed up the performance of a computer.
b)
When several programs run at the same time, the RAM can be full. Instead of closing programs the Operating system uses virtual memory to store some data.
9.
Where is data stored when it is Virtual Memory?
a)
It is stored on a area of a secondary storage device e.g. hard disk drive.
b)
It is stored in the RAM.
c)
It is stored in the ROM.
d)
It is stored in an optical drive e.g. CD.
10.
What is a disadvantage of Virtual Memory?
a)
Read/Write speed of a hard disk drive is slower than RAM. If the computer has to rely on this, the system is much slower.
b)
Read/Write speeds of a hard drive are faster than RAM, meaning the system is much faster.
11.
Optical device, fairly fragile, easy to snap or scratch.
a)
Flash memory
b)
Magnetic Tape
c)
CD
d)
Hard disk
12.
Not intended to be a portable storage device.
a)
CD
b)
Flash memory
c)
DVD
d)
Internal hard disk
13.
Very portable as it is designed to be fitted into small electronic devices.
a)
Flash memory devices
b)
Internal hard disk
c)
Magnetic tape
d)
Server
14.
The most durable storage device as it has not moving parts
a)
Solid State Storage
b)
Magnetic Storage
c)
Optical Storage
15.
Large computers used for backup storage are called
a)
Supercomputers
b)
Servers
c)
Clients
d)
Giants
16.
Which is a disadvantage of cloud storage?
a)
It's expensive
b)
It doesn't last long
c)
It could be a security risk
d)
It's 
17.
Which of the following is not a type of storage. (1/2)
a)
Magnetic
b)
Solid State
c)
Optical
d)
Hard Drive
18.
What type of storage is a DVD ROM? (1/2)
a)
It is not a storage device
b)
Solid State
c)
Optical
d)
Magnetic
19.
What type of storage is a USB memory stick? (4/5)
a)
Solid State
b)
Optical
c)
Magnetic
d)
It is not a storage device
20.
What type of storage is a SSD card? (4/5)
a)
Magnetic
b)
It is not a storage device
c)
Solid State
d)
Optical
21.
What type of storage is a HDD? (4/5)
a)
Solid State
b)
Optical
c)
Magnetic
d)
It is not a storage device
22.

Which of the following types of storage would likely access its data the fastest? (4-6)

a)

It is not a storage device

b)

Magnetic

c)

Solid State

d)

Optical

23.
Which of the following types of storage is the most durable? (9)
a)
Optical
b)
It is not a storage device
c)
Solid State
d)
Magnetic
24.
Which of the following types of storage is the most expensive per MB/GB? (9)
a)
Solid State
b)
Magnetic
c)
It is not a storage device
d)
Optical
25.
Why is a Hard Disk Drive (HDD) not very portable? (9)
a)
It has moving parts
b)
It will break if you touch it
c)
It is too small
d)
It is too large
26.

Why does a laptop need secondary storage? (1/2)

a)

To store data

b)

To backup files to move to another computer

c)

files and software for future use

d)

To storage programs that are currently running

27.
Which type of storage uses lasers to write the data? (4/5)
a)
Magnetic
b)
All types
c)
Solid state
d)
Optical
28.

The types of storage are listed below from least expensive per GB to the most expensive per GB. Which order is correct? (9)

a)

Solid State, Optical, Magnetic

b)

Optical, Magnetic, Solid State

c)

Magnetic, Solid State, Optical

d)

Optical, Solid State, Magnetic

e)

Magnetic, Optical, Solid State

29.

The types of storage are listed below from the most reliable to the least reliable per GB. Which order is correct? (9)

a)

Solid State, Magnetic, Optical

b)

Optical, Solid State, Magnetic

c)

Magnetic, Optical, Solid State

d)

Solid State, Optical, Magnetic

e)

Magnetic, Solid State, Optical

30.

The types of storage are listed below from fastest to slowest. Which order is correct? (9)

a)

Magnetic, Optical, Solid State

b)

Solid State, Optical, Magnetic

c)

Magnetic, Optical, Solid State

d)

Optical, Magnetic, Solid State

e)

Solid State, Magnetic, Optical

31.

Computers use binary to store data.

a)

True

b)

False

32.

Which number base is Binary?

a)

10

b)

2

c)

16

33.

Which of the following units is the smallest in terms of size?

Kilobyte, Megabyte,Nibble.

a)

Kilobyte

b)

Megabyte

c)

Nibble

34.

How many bits are in a byte?

a)

2

b)

4

c)

6

d)

8

35.

How many bits are in a nibble?

a)

2

b)

4

c)

6

d)

8

36.

Smallest to largest, which of the below answers is correct?

a)

bit, nibble,byte,megabyte,kilobyte,terabyte,petabyte

b)

nibble, bit,byte,kilobyte,megabyte,terabyte,petabyte

c)

bit,byte,nibble,kilobyte,megabyte,petabyte,terabyte

d)

bit, nibble,byte,kilobyte,megabyte,terabyte,petabyte

37.

Convert the following denary number into binary(11).

a)

0011

b)

1011

c)

1100

d)

1010

38.

Convert the following denary number to binary (9).

a)

1010

b)

1011

c)

1001

d)

0111

39.

Convert the following denary into binary (21)

a)

0001 0101

b)

0011 0101

c)

0111 0111

d)

0100 0101

40.

Convert the following denary into binary (100).

a)

0111 0100

b)

0110 0100

c)

0101 100

d)

0110 1100

41.

Convert the following binary number to denary (0000 1111).

a)

15

b)

12

c)

10

d)

8

42.

Convert the following binary number to denary ( 0001 1001).

a)

21

b)

23

c)

25

d)

27

43.

Convert the following binary into denary (0011 1111).

a)

59

b)

61

c)

63

d)

65

44.

What is the hexadecimal value for the denary number (12).

a)

A

b)

B

c)

C

d)

D

45.

What is the hexadecimal value for the binary number (0000 1111).

a)

0d

b)

0e

c)

ff

d)

0f

46.

Convert the following binary number to hexadecimal (1001 1111)

a)

8d

b)

8e

c)

9e

d)

9f

47.

Convert the following binary number to hexadecimal( 1100 0111).

a)

c7

b)

a6

c)

b7

d)

d7

48.

Add the following nibbles together and select the correct answer from the list below. (1110 + 0010). Answer will be expressed in 4 bits.

a)

0001

b)

0000

c)

10000

d)

1001

49.

What it is known as when a calculation has been run but there is not enough space to store the answer?

a)

Syntax Error

b)

Overflow Error

c)

Indentation Error

50.

Convert the hex value A5 to binary

a)

10101010

b)

00011111

c)

01011010

d)

10100101

51.

You work out the approximate file size of an image using:

(bpp is bits per pixel - the colour depth)

a)

height × width × 8bpp\frac{height\ \times\ width\ \times\ 8}{bpp}  

b)

height × width × bpp8\frac{height\ \times\ width\ \times\ bpp}{8}  

c)

height × width × bpp × 8height\ \times\ width\ \times\ bpp\ \times\ 8  

d)

height × width8 ×bpp\frac{height\ \times\ width}{8\ \times bpp}  

52.

What is sample resolution in a sound file?

a)

The number of different values used to represent a sample in the file

b)

The number of bits used per second in the file

c)

The number of bits used to store each sample in the file

d)

The ratio of the compressed file size to the uncompressed size

53.

A sound file's size is increased by

a)

A greater bit depth

b)

Lossy Compression

c)

Higher sample frequency

d)

The volume of the sound

54.

Analogue sound waves are digitised in a process known as (a)  

55.

What is the decimal equivalent of hexadecimal value 'D'?

a)

11

b)

10

c)

13

d)

14

56.

Convert Denary into Binary:

254

a)

1111 1100

b)

1110 1111

c)

1010 0101

d)

1111 1110

57.

Convert Binary into Hexadecimal:

1011 1110 0001

a)

CE2

b)

6ED

c)

BE1

d)

9G2

58.

What is meant by sampling resolution (bit depth)?

a)

The number of bits per sample.

b)

The number of bytes per sample.

c)

The number of pixels per sample.

d)

The number of data per sample.

59.

Bitmap images are made up of (a)  

60.

The number of bits used to represent each color is called the (a)  

61.

Main drawback of high resolution images?

a)

Increase in file size

b)

Increase in pixels

c)

The quality of Image.

d)

No drawbacks.

62.

What is an Image Resolution?

a)

Number of pixels in an image.

b)

Number of bits in an image.

c)

Number of bytes in an image.

d)

Number of data in an image.

63.

A (a)   is the basic unit of all computing memory storage terms.

64.
A kilobyte is usually rounded to 1000 bytes. But actually it is _____ bytes:
a)
1024
b)
512
c)
1048
d)
9600
65.
A gigabyte consists of 1024:
a)
megabytes
b)
terabytes
c)
kilobytes
d)
nibbles
66.

Which of these is the smallest?

a)

Megabyte

b)

Kilobyte

c)

Gigabyte

d)

Terabyte

67.
ASCII is:
a)
a numerical system that has 2 rather than 10 as a base.
b)
the most common format for text files in computers and on the Internet
68.
True or False: In an ASCII file, each alphabetic, numeric, or special character is represented with a 7-bit binary number (a string of seven 0s or 1s).
a)
True
b)
False
69.

A bitmap image is made up of

a)

Pixels

b)

Colours

c)

Sounds

d)

Samples

70.
Increasing the colour depth means…
a)
A bigger range of colours can be used for each pixel
b)
More pixels are in the image.
c)
More colours are in the image.
d)
Darker colours
71.
Reducing the amount of colours in the image will
a)
Reduce the quality of the image.
b)
Reduce the amount of binary needed for each pixel.
c)
Make the file size larger
d)
Remove pixels from the image.
72.
Additional Information about the image file is stored as
a)
Metadata
b)
Properties
c)
File summary
d)
Pixels
73.
Increasing the resolution of an image means that
a)
More pixels will be used to make up the image
b)
More colours will be used to make up the image
c)
The image size will be bigger
74.
How could you reduce the file size of an image?
a)
Reduce the numbr of colours used per pixel (colour depth)
b)
Reduce the dimensions of the image.
c)
Compress the file using a lossy compression file type.
d)
All of these
75.
What is real life sound known as?
a)
Analogue Sound
b)
Digital Sound
76.
What is the process called for  converting analogue sound into binary (digital format)?
a)
Conversions
b)
Sampling
c)
Bit Rate
d)
Converting
77.
The height of a sound wave graph is related to what?
a)
Amplitude (loudness)
b)
Pace (speed)
c)
Key
d)
Tone
78.
The amplitude of sound is measured in normal denary numbers and converted into binary?
a)
True
b)
False
79.
What is a factor that effects the samples taken per second from an analogue sound wave?
a)
File Size
b)
Amplitude
c)
Tone
d)
Resolution
80.
What is bit depth?
a)
Number of bits assigned to each sample
b)
Rate at which the binary is calculated
c)
How deep the sound can go
d)
The speed of the sound wave
81.

is how many samples you take in a second.

a)

Sample Rate

b)

Sample Resolution

c)

Binary

d)

File Size

82.

5 Seconds of audio, sample resolution of 2 bits and a sample rate of 2. What is the correct file size?

a)

10

b)

20

c)

15

d)

32

83.

Increasing the sample rate means the analogue recording is sampled more often?

a)

True

b)

False

84.

Increasing either the sample rate or sample resolution will increase the file size?

a)

True

b)

False

85.

Refers to the compression when some of the data from the original file is lost

a)

lossless

b)

300 dpi

c)

lossy

d)

cmyk

86.

Which is a pro of your file being lossy

a)

quality is loss

b)

reduce download time

c)

lower quality

d)

can't get original back

87.

Which is a pro of your file being lossy

a)

quality loss

b)

cant' get original back

c)

reduced file size

d)

lower quality

88.

Which is a pro of your file being lossy

a)

can't get original back

b)

easy uploading

c)

lower quality

d)

quality loss

89.

Which is a con of your file being lossy

a)

reduced file size

b)

reduced download size

c)

quality loss

d)

easy uploading

90.

Which is a con of your file being lossy

a)

easy uploading

b)

reduced file size

c)

reduced downloading

d)

can't get original back

91.

Lossy =

a)

not losing

b)

getting all quality of an image

c)

loses some quality

d)

keeps all image quality

92.

Name one common file format that is LOSSY

a)

.PDF

b)

.TIFF

c)

.JPG

d)

.BMP

93.

Refers to compression when the image is reduced without any quality loss

a)

Lossy

b)

RGB

c)

72 PPI

d)

Lossless

94.

Which is a pro of Lossless

a)

larger files vs. lossy files

b)

low low low quality

c)

its become pixelated

d)

No loss of quality when compressed

95.

Which is a con of Lossless

a)

no loss of quality

b)

Large files even after compressed vs. Lossy files after compressed

c)

keeps all quality

d)

Perfect for photos

96.

Lossless =

a)

all the quality is loss

b)

you loss it all

c)

No quality is loss

d)

you lose your mind

97.

Which is a lossless file format?

a)

.JPG

b)

.DOC

c)

.XSL

d)

.PDF

98.

Which is a lossless file format?

a)

.DOC

b)

.JPG

c)

.TIFF

d)

.INDD

99.

Is .JPG lossy or lossless?

a)

lossy

b)

lossless

100.

Is .PDF lossy or lossless?

a)

lossy

b)

lossless

101.

Is .TIFF lossy or lossless?

a)

lossy

b)

lossless

102.

Is .BMP lossy or lossless?

a)

lossy

b)

lossless

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