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Data Rep CS

Total questions: 40

Worksheet time: 22mins

Name
Class
Date
1.

How many colours can a bitmap using 2-bit colour depth contain?

a)

2

b)

4

c)

8

d)

16

2.

3.5MB is how many kB?

a)

350

b)

3500

c)

3500000

d)

35000

3.

In order for sound to be stored in a computer it must be converted to...

a)

Analogue

b)

Digital

c)

Buddhism

d)

JPEG

4.

Sound outside of computers is...

a)

Analogue

b)

Digital

5.

You would use ______ compression if space was more important than quality

a)

Lossy

b)

Lossless

6.

Lossless compression permanently deletes the data

a)

True

b)

False

7.
What would you use compression for?
a)
Making an image file smaller
b)
Modifying an image 
8.
Makes the file smaller by giving repeated patterns/colours a specific code
a)
Lossy Compression
b)
Lossless Compression
9.

Compression that can compress data files without losing any of the information is called

a)

Lossy

b)

Lossless

10.
A bitmap image is made up of
a)
Pixels
b)
Colours
c)
Sounds
d)
Samples
e)
Characters
11.

What is the formula for finding a sound files size?

a)

size = rate * resolution * seconds

b)

size = rate * resolution * minutes

c)

size = amplitude * bits * seconds

d)

size = sample * frequency * bits

12.
How does sound travel?
a)
Sounds travels in waves
b)
sound travels slow
c)
sound travels fast
d)
sound doesn't travel
13.

Is 'real' sound analogue or digital?

a)

Analogue

b)

Digital

14.
How is sound caused?
a)
By playing it through a hi-fi with speakers
b)
Vibrations travelling through air, water or metal.
15.
How many kilobytes are in a gigabyte
a)
1024
b)
210
c)
220
d)
10
16.
Compression helps when sending files over the Internet because...
a)
Less packets have to be sent so it is quicker
b)
Lossy compression is better
c)
Routers can recognise zipped files
d)
Lossless compression is better
17.

What is ASCII used for?

a)

Storing text

b)

Storing sounds

c)

Storing images

d)

Storing video

18.

What does ASCII stand for?

a)

Australian Standard Code for Information Interchange

b)

Aberdonian Standard Code for Information Interchange

c)

American Standard Code for Information Interchange

d)

African Standard Code for Information Interchange

19.

An image is 16 x 16 pixels in size. It has a colour depth of 16 bits. What is the size of the image in KB?

a)

512

b)

5.12

c)

0.5

d)

51.2

20.
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
21.
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
22.
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.
23.

Which is larger?

a)

Megabyte

b)

Kilobyte

24.
A gigabyte consists of 1024:
a)
megabytes
b)
terabytes
c)
kilobytes
d)
nibbles
25.

A kilobyte is

a)

1024 bits

b)

1024 bytes

26.
A byte is
a)
8 bits
b)
4 bits
27.
In computing, a bit is
a)
8 bytes
b)
a single    0 or 1     on or off
28.
The higher the resolution, the ____ the file size.
a)
Smaller
b)
Larger
29.

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

30.
The smallest unit of data stored in an image file is called:
a)
Pixels
b)
Resolution
c)
Alpha
d)
Bitmap.
31.
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.
32.
Computers can only understand 0s and 1s.
a)
True
b)
False
33.
What is the point of binary?
a)
It represents how computers interpret electrical signals
b)
Because we like to make you do extra maths ;-D
c)
For the lulz
d)
Because it describes star systems
34.
Convert 11111111 to decimal
a)
255
b)
245
c)
235
d)
225
35.
Convert 128 to binary
a)
10000000
b)
01111110
c)
10000001
d)
11001100
36.
What is 3 in binary?
a)
0100
b)
0001
c)
0101
d)
0011
37.
What is 12 in binary?
a)
0010
b)
1010
c)
1100
d)
1111
38.
Binary uses 1’s & 0’s to represent data
a)
True
b)
False
39.
Denary uses 11 different numbers
a)
True
b)
False
40.
Denary is numbers humans use in every day life
a)
True 
b)
False

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