WorksheetsComputer Images HWK 9TE5
Total questions: 15
Worksheet time: 8mins
Name
Class
Date
1.
(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
2.
The first ever digital image which was of the inventor's son was created in ....
a)
1958
b)
1968
c)
1957
d)
1972
3.
The romans used ..... in their houses which illustrate the idea of how a picture can be represented in a digital format.
a)
Mosaics
b)
Tiles
c)
Paintings
d)
Non of these
4.
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
5.
The image on the left has been made by the computer interpreting rows of binary code. How are the '1' digits being interpreted and used to switch on each individual picture element?
a)
As white colour or no colour
b)
As black colour
c)
None of the above
6.
Colour depth is the term used to describe .....
N.B. The term 'bit' means a binary digit e.g. '1' or '0'
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
7.
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
8.
If 3 bits were used per pixel, how many different colours could a computer show on a screen?
a)
3 colours
b)
4 colours
c)
6 colours
d)
8 colours
9.
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
10.
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
11.
How many colours can the human eye see, approximately?
a)
1000
b)
1000,000
c)
1000,000,000
d)
10,000,000
12.
The iPhone shown on the right has a resolution of 1136 x 640 pixels. How is this an improvement on the older type of phone shown on the left?
a)
More pixels mean more colours
b)
More pixels mean a less pixelated image
13.
What is STEGANOGRAPHY?
a)
WRITING IN SHORT HAND
b)
THE STUDY OF DINOSAURS
c)
THE SCIENCE OF HIDING SECRET MESSAGES
d)
THE STUDY OF HAND WRITING
14.
PRESIDENT'S EMBARGO RULING SHOULD HAVE IMMEDIATE NOTICE. GRAVE SITUATION AFFECTING INTERNATIONAL LAW. STATEMENT FORESHADOWS RUIN OF MANY NEUTRALS. YELLOW JOURNALS UNIFYING NATIONAL EXCITEMENT IMMENSELY.
What is the name of the ship hidden in this cipher?
What is the name of the ship hidden in this cipher?
a)
Titanic
b)
Perseus
c)
Queen Mary
d)
Pershing
15.
How would you hide a secret message using Photoshop in this image? Choose which option gives the best answer.
a)
By using a painting tool to directly paint onto the image
b)
By zooming into single pixel level and using the Brush Tool
c)
By zooming out and using the Brush Tool to paint onto the image
d)
By zooming into single pixel level and using the Brush Tool to paint each individual pixel
100 %
