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WorksheetsYear nine summative #2 misconceptions
Total questions: 20
Worksheet time: 10mins
How many bits per pixel do you need to make 4 colours?
colour depth of 1
colour depth of 2
colour depth of 3
colour depth of 4
Bitmap Colour Depth is
the colour of each pixel.
the density of pixels in an image.
information stored in an image to help recreate the image.
the number of bits used for each pixel.
Increasing Colour Depth and Resolution
increases the File size
decreases the File size
increases memory
decreases sound
How is the resolution of an image calculated?
Width in pixels * height in pixels
Colour depth * number of pixels
Number of pixels squared
Sample rate * sample resolution * length in seconds
How many colours can a bitmap using 2-bit colour depth contain?
2
4
8
16
Colour depth defines...
How many bits are needed to store each pixel
How many pixels are in an image
The file size of a bitmap image
The sample rate of sound
When recording sound, the number of samples recorded per second is called the:
sample rate
sample resolution
colour depth
File size
To calculate the size of a sound file:
colour depth * resolution
sample rate * sample resolution * length in seconds
number of samples * sample rate
sample resolution squared
A 10-second sound recorded at 1000 Hz and 8-bit sample resolution will have a file size of...
10 KB
10 B
10,000 KB
10,000 B
An image with only 3 colours could be stored using what minimum colour depth?
2 bit
3 bit
4 bit
1 bit
What is a String?
A data type that contains whole numbers, e.g., 3, 45, 124.
Numbers with a decimal point, e.g., 0.5, 2.45, 56.04.
A group of characters between quotation marks, e.g., "dog".
A data type that can only be True or False.
What is a Boolean?
A data type that contains whole numbers, e.g., 3, 45, 124.
Numbers with a decimal point, e.g., 0.5, 2.45, 56.04.
A group of characters between quotation marks, e.g., "dog".
A data type that can only be True or False.
What does the '==' operator mean?
Greater than
Less than
Equal to
Not equal to
What is the name of the variable in this program?
colour
input
" "
To display the following on screen Hello World! the following command should be used:
print(Hello World!)
print("Hello World" + !)
print("Hello World!")
print"(Hello World!)"
What is the name of the variable in this program?
colour
input
" "
Which of the following operators is used to check if two values are not equal in Python?
!=
==
<=
>
What is the output?
True
False
condition1
condition2
What will this code print?
access denied
access granted
error
password
The diamond shape is used in flowcharts to indicate......
A process
An input
A decision
Start or End
