WorksheetsData Representation
Total questions: 45
Worksheet time: 31mins
Name
Class
Date
1.
What is Image Resolution?
a)
The number of pixels per inch
b)
how a picture appears on the screen
c)
How clear a picture is
2.
What does colour depth mean?
a)
It refers to the number of bits used to represent the colour.
b)
It refers to how deep the colours go
c)
it refers to the number of bytes in the colours
3.
How many colours do we get from 2 bits
a)
2 colours
b)
4 colours
c)
8 colours
d)
24 colours
4.
How many colours do we get from 3 bits?
a)
2 colours
b)
4 colours
c)
8 colours
d)
24 colours
5.
how many colours do we get from 4 bits
a)
2
b)
4
c)
8
d)
16
6.
When a picture becomes blurry, what is the key-term for descibing what the picturehas become?
a)
Pick up truck
b)
Pixie letters
c)
Pixar
d)
Pixelated
7.
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
8.
A pixel is the _______ part of an image.
a)
Smallest
b)
Largest
9.
The colour of a pixel can be stored as a _______ number
a)
Unicode
b)
Hex
c)
Binary
d)
ASCII
10.
Each pixel is displayed using a combination of what three colours?
a)
Blue, green and purple
b)
Red, grey and white
c)
Red, green and blue
d)
White, red and blue
11.
Picture resolution refers to the concentration of pixels. How is it usually measured?
a)
Dots per inch (DPI)
b)
Dots per image (DPI)
c)
Pixels per inch (PPI)
d)
Pixels per image (PPI)
12.
The higher the colour depth, the _________the image file size.
a)
Smaller
b)
Larger
13.
Convert 11001001 to Denary.
a)
199
b)
200
c)
201
d)
202
14.
Convert 7A Hexadecimal to Binary.
a)
01111010
b)
01111000
c)
01110100
d)
01110010
15.
Convert 9C to Denary.
a)
155
b)
156
c)
157
d)
158
16.
Add the two binary numbers: 11110000 + 00001001
a)
11111001
b)
00110101
c)
11001011
d)
00100111
17.
What problem occurs when the following two numbers are added together?11010011 + 11010011
a)
overpour
b)
overgo
c)
overflow
d)
overmove
18.
To transfer sound to a computer it needs to be digitally...
a)
passed
b)
interval rate
c)
given
d)
sampled
19.
The type of compression which removes some of the data from a file in order to reduce its size.
a)
Lossy
b)
Lossless
20.
The type of compression which is used when it is important to not lose any of the information in a file.
a)
Lossy
b)
Lossless
21.
Binary is a base two number system. What does this mean?
a)
That there are 10 possible states (0-9)
b)
That there are 16 possible states (0-9 and A-F)
c)
That there are 2 possible states (0 or 1)
d)
That the computer can only understand letters
22.
Why do computers use binary?
a)
It is easier to deal with only two states (0 or 1)
b)
It is easier to understand
23.
What is the smallest unit of data in binary?
a)
A nibble
b)
A byte
c)
A bit
d)
A letter
24.
How many bits are in a byte?
a)
2
b)
0
c)
8
d)
4
25.
What is a nibble?
a)
Half a bye (4 bits)
b)
8 bits
c)
1 bit
d)
Something to eat
26.
What is a gigabyte (GB)?
a)
8 bits
b)
1024 kilobytes (KB)
c)
1024 bytes (B)
d)
1024 megabytes (MB)
27.
If a PS4 has a storage capacity of 500GB, and each game is 50GB, how many games can be stored on the PS4's hard drive?
a)
1
b)
5
c)
10
d)
15
28.
What will this binary number be in denary (normal number)?
a)
255
b)
64
c)
32
d)
0
29.
What is a bitmap image?
a)
An image stored as a series of bits where each bit represents a part of an image
b)
An image of of different maps.
c)
An image split into pieces.
d)
An image about bits.
30.
What is meant by the resolution of an image?
a)
This is information about the image
b)
This means the number of dots (pixels) in an image
31.
An image with a higher resolution means a better quality image. True or false?
a)
True
b)
False
32.
The higher the resolution of the image, the bigger the file size. Is this true or false?
a)
True
b)
False
33.
What unit is sample rate measured in? (1-4)
a)
Bits per second (bps)
b)
Hertz (Hz)
c)
Megabits per second (Mbps)
34.
Which of the following is not true if you increase the sample rate? (3-6)
a)
Better quality of recording
b)
Needs greater storage space
c)
larger file size
d)
Decrease in quality
35.
What is measured when the wave is sampled? (3-6)
a)
Amplitude
b)
Hertz
c)
Bit rate
d)
Frequency
36.
What sample rate is used for CD quality sound? (6-8)
a)
44,100 Hz
b)
88,200 Hz
c)
22,100 Hz
37.
What piece of hardware would you use to input sound into a computer? (1-3)
a)
Speaker
b)
Analogue to digital converter
c)
Microphone
d)
Digital to analogue converter
38.
If you increase the bit depth of an audio file then you increase thequality? (1-4)
a)
False
b)
True
39.
The amplitude of a sound wave is… (6-9)
a)
how high the wave is from the crest or trough
b)
the frequency at which it is sampled
c)
the speed at which it travels through air
40.
What language do computers use?
a)
English
b)
Binary
c)
UNICODE
41.
How many colours are available in a 4 bit image?
a)
16
b)
256
c)
4
42.
What is a sampling rate?
a)
How many samples are taken a second
b)
The amount of characters in a data set
c)
The amount of pixels in an image
d)
The frequency
43.
The number of samples taken each second
a)
Bit Rate
b)
Sample rate
44.
A continuous sound signal
a)
Analogue
b)
Digital
45.
A discrete (non-continuous) sound signal
a)
Analogue
b)
Digital
100 %
