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1.2.4 Data storage

Total questions: 65

Worksheet time: 37mins

Name
Class
Date
1.

How many colours can an image with a colour depth of 3 store?

a)

2 colours

b)

4 colours

c)

8 colours

d)

24 colours

2.

How many colours can be displayed by an image with a colour depth of 2 bits?

a)

2 colours

b)

4 colours

c)

8 colours

d)

24 colours

3.

Additional Information about the image file is stored as

a)

Metadata

b)

Properties

c)

File summary

d)

Pixels

4.

What is the sample rate?

a)

The number of times a sound wave is sampled per second

b)

The number of bits used to store each sample

c)

How loud a sound is

d)

The size of the sound wave

5.

What is sample rate measure in?

a)

Bits

b)

Hertz

c)

GB

d)

amps

6.

A sound has a file size of 17, 640 kilobytes. How much would this be in megabytes? (using 1000kb instead of 1024kb for simple quicker maths)

a)

1.76

b)

17.64

c)

176.4

d)

1764

7.

What is the name of the process of capturing sound and converting it into digital form?

(a)  

8.

Why is there a need for secondary storage in a computer?

a)

To store files for a long period of time, such as the operating system

b)

To hold cd's and dvd's

9.
Colour depth refers to:
a)
How many bits are used in a file to store colour information in every pixel
b)
Resolution divided by the number of colours in an image.
c)
Degree of file compression applied to an image file.
d)
Repeated resampling of an image.
10.
The smallest unit of data stored in an image file is called:
a)
Pixels
b)
Resolution
c)
Alpha
d)
Bitmap.
11.
The higher the resolution, the ____ the file size.
a)
Smaller
b)
Larger
12.
Which is NOT an example of metadata for an image file?
a)
Resolution
b)
Colour depth
c)
Camera used
d)
Sample rate
13.
Additional Information about the image file is stored as
a)
Metadata
b)
Properties
c)
File summary
d)
Pixels
14.
Which is NOT an effect of increasing the resolution in an image?
a)
More colours can be displayed.
b)
More binary will be required to create the image.
c)
Larger file size
d)
Higher quality image
15.
Which is NOT an effect of increasing the colour depth in an image?
a)
More colours can be displayed.
b)
More binary will be needed per pixel to create the image.
c)
Larger file size
d)
More pixels will be displayed in the image.
16.
What would be the colour depth of an image which can use up to 256 colours?
a)
256 bit
b)
8 bit
c)
8 byte
d)
256 byte
17.

An image is 10 pixels wide and 8 pixels high. It has a colour depth of 8 bits. What is the file size of the image in bytes?

a)

8

b)

80

c)

800

d)

64

18.

What is amplitude?

a)

Number of samples taken

b)

The number of bits per sample

c)

The height of the sound wave

d)

The pitch

19.

The ASCII code is represented by using 16 bits

a)

True

b)

False

20.

The ASCII is capable of representing non-European languages

a)

True

b)

False

21.

Upper and lower case letters have a different ASCII code?

a)

True

b)

False

22.

What is the maximum number of values that can be represented in 8-bits?

a)

16

b)

256

c)

128

d)

65,536

23.

What is the maximum number of values that can be represented in 7-bits?

a)

16

b)

256

c)

128

d)

65,536

24.

A character set is...

a)

What language can be used in a computer system

b)

The fonts that a computer has installed.

c)

The possible characters that can be represented by a computer system.

25.

ASCII can represent more characters than Unicode?

a)

True

b)

False

26.

ASCII Stands for

(a)  

27.
(Fill in the blank to complete the sentence) Tiny squares called ..... are the building blocks of all digital images.
a)
elements
b)
squares
c)
pixars
d)
pixels
28.
The digital picture shown has been zoomed in and appears now to be very 'blocky'. What is the correct term for this?
a)
Poor resolution
b)
Digitisation
c)
Pixelation
d)
Granularity
29.
Colour depth is the term used to describe .....
N.B. The term 'bit' means a binary digit e.g. '1' or '0'
a)
how many colours have been used to make the picture
b)
how many colours there in each pixel
c)
none of these
d)
the number of bits used to indicate the colour of a single pixel
30.
Which one of the following answers best describe a limitation of this system
a)
Only a few colours can be displayed
b)
The system could not be used for simple computer games
c)
Only 1 colour can be displayed
d)
Only 2 colors can be displayed
31.
(Fill in the blank to complete the sentence) Tiny squares called ..... are the building blocks of all digital images.
a)
elements
b)
squares
c)
pixars
d)
pixels
32.
The digital picture shown has been zoomed in and appears now to be very 'blocky'. What is the correct term for this?
a)
Poor resolution
b)
Digitisation
c)
Pixelation
d)
Granularity
33.
Colour depth is the term used to describe .....
N.B. The term 'bit' means a binary digit e.g. '1' or '0'
a)
how many colours have been used to make the picture
b)
how many colours there in each pixel
c)
none of these
d)
the number of bits used to indicate the colour of a single pixel
34.
Which one of the following answers best describe a limitation of this system
a)
Only a few colours can be displayed
b)
The system could not be used for simple computer games
c)
Only 1 colour can be displayed
d)
Only 2 colors can be displayed
35.
How many colours is the bottom picture showing given that it is using 4 bit colour depth?
a)
16 colours
b)
4 colours
c)
256 colours
d)
5 colours
36.
What will happen to the computer file size as the colour depth is increased?
a)
The file size will get smaller
b)
There will be no change in file size
c)
The file size will get bigger
d)
None of these
37.
Resolution means
a)
how fast can the file be sent
b)
how much detail in an image. higher resolution means more image detail
c)
exactly
d)
change picture so it looks wrong
38.
Colour depth means
a)
the difference in brightness between objects or regions
b)

the relationship between picture width and its height.
c)
the overall lightness or darkness
d)
the number of bits used for each colour of a single pixel.
39.
When we have a 'one-bit' colour, which are the only two binary numbers that are possibilities?
a)
00 and 11
b)
000 and 111
c)
0 and 1
d)
0000 and 1111
40.
How many combinations are there for a '2 bit' colour?
a)
8
b)
4
c)
16
d)
32
41.
Which 'bit' image would give the best picture quality?
a)
24
b)
4
c)
8
d)
2
42.
When you 'compress' a file, what happens?
a)
You squash your computer.
b)
The bitsize reduces and unnecessary information is removed.
c)
You put a flannel on your computer.
d)
The file size increases.
43.
What will happen to the computer file size as the colour depth is increased?
a)
The file size will get smaller
b)
There will be no change in file size
c)
The file size will get bigger
d)
None of these
44.
Resolution means
a)
how fast can the file be sent
b)
how much detail in an image. higher resolution means more image detail
c)
exactly
d)
change picture so it looks wrong
45.
Colour depth means
a)
the difference in brightness between objects or regions
b)

the relationship between picture width and its height.
c)
the overall lightness or darkness
d)
the number of bits used for each colour of a single pixel.
46.
When we have a 'one-bit' colour, which are the only two binary numbers that are possibilities?
a)
00 and 11
b)
000 and 111
c)
0 and 1
d)
0000 and 1111
47.
How many combinations are there for a '2 bit' colour?
a)
8
b)
4
c)
16
d)
32
48.
Which 'bit' image would give the best picture quality?
a)
24
b)
4
c)
8
d)
2
49.
Quality of an image depends on:
a)
Resolution
b)
Metadata
c)
Screen size
d)
Computer's speed
50.
The density of pixels in an image file is known as:
a)
Resolution
b)
Dimensions.
c)
Transparency.
d)
Compression.
51.
Resolution is measured in:
a)
Pixels per mm or per inch
b)
Print size.
c)
Milimeters.
d)
Bytes.
52.
Most graphic formats create many colours from:
a)
Red, green, blue.
b)
Red, pink, yellow.
c)
Red, white, blue.
d)
Black, white, green.
53.
Alpha-channel present in some images refers to:
a)
Transparency of pixels.
b)
Quality of a file.
c)
The order in which alternative pixels are loaded.
d)
Degree of file compression applied to an image file.
54.
A bitmap file is an example of raster graphics.
a)
True
b)
False
55.

What is the sample rate?

a)

The number of times a sound wave is sampled per second

b)

The number of bits used to store each sample

c)

How loud a sound is

d)

The size of the sound wave

56.
The most common sampling rate for sound files is 44.1 khz.
a)
True
b)
False
57.
What is the difference between analogue and digital data?
a)
Analogue is continuous data, whereas digital signals have two values, 0 and 1.
b)
Analogue has two values 0 and 1, whereas digital is continuous data.
58.

What is sound?

a)

A ball

b)

A wave

c)

A collection of particles moving in circles

d)

A number of electrons moving in spirals

59.
A kilobyte is usually rounded to 1000 bytes. But actually it is _____ bytes:
a)
1024
b)
512
c)
1048
d)
9600
60.
A gigabyte consists of 1024:
a)
megabytes
b)
terabytes
c)
kilobytes
d)
nibbles
61.
The following is a correct order of units of storage from lowest to highest:
a)
a bit, a nibble, a byte, a kilobyte, a megabyte, a gigabyte, a terabyte
b)
a bit, a byte, a nibble, a kilobyte, a megabyte, a gigabyte, a terabyte
c)
a bit, a nibble, a byte, a megabyte, a kilobyte, a gigabyte, a terabyte
d)
a byte, a bit, a nibble, a megabyte, a kilobyte, a gigabyte, a terabyte
62.

Which is the smallest form of data?

a)

Bit

b)

Byte

c)

Nibble

d)

8 Binary Digits

63.

Convert 129 to binary

a)

10000001

b)

01111110

c)

01000000

d)

11001100

64.
What is 126 in hexadecimal
a)
7E
b)
111110
c)
76
d)
7F
65.
What is 27 in hexadecimal
a)
1B
b)
17
c)
11011
d)
1C

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