Bitmap and Vector Images
What is a bitmap image?
A bitmap image is made up of pixels, with each pixel storing color information.
How many bits are in a byte?
8 bits
What function is used to find the sum of values in a range?
SUM function
What data type is used for storing whole numbers in Python?
Integer (int)
What is application software?
Software that allows users to perform specific tasks like word processing or browsing the web.
How is a vector image different from a bitmap image?
Vector images use mathematical formulas to create shapes, making them scalable without losing quality, whereas bitmaps are pixel-based.
Convert 16 bits into bytes.
16 bits = 2 bytes
What type of chart would best represent parts of a whole?
Pie chart
What function is used to display output in Python?
print()
Give an example of an operating system.
Windows, macOS, Linux, Android, or iOS.
What formula determines the number of pixels in an image?
Pixel count = Width (in pixels) × Height (in pixels)
What is the difference between kilobytes (KB) and kibibytes (KiB)?
KB is based on decimal (1 KB = 1000 bytes), while KiB is based on binary (1 KiB = 1024 bytes).
What are three ways to format a worksheet for better readability?
Adjust font size, change cell colors, and use conditional formatting.
How do you add an item to a list in Python?
Using the .append() method
What is the main role of an operating system?
It manages hardware and software resources, provides a user interface, and handles security.
What factors affect the file size of a bitmap image?
Resolution, color depth, pixel dimensions, and compression.
Convert 4 nibbles into bytes.
4 nibbles = 2 bytes (1 nibble = 4 bits, 8 bits = 1 byte)
What does the COUNT function do in spreadsheets?
It counts the number of numeric values in a given range.
What does the following code do: my_string[1:5]?
Slices the string to return characters from index 1 to 4.
What is utility software? Give an example.
Software that performs maintenance tasks, such as antivirus programs or disk management tools.
What is color depth, and how does it affect image quality?
Color depth is the number of bits used to store color per pixel. Higher color depth increases image quality but also increases file size.
How does binary differ from denary?
Binary is a base-2 system using only 0s and 1s, while denary (decimal) is a base-10 system using digits 0-9.
Name two key features of a well-designed infographic.
Clear data visualization and minimal text with relevant images.
How do you remove an item from a list in Python?
Using the .pop() method.
How do operating systems contribute to security?
They manage user authentication, file permissions, and system updates to prevent unauthorized access and malware infections.