What is metadata? Give an example. Metadata is information about data. Generally, it is data/tags/info that is linked to the data to give a description about the data, such as the owner, creation date, edited date, etc. For instance, a Word Document would have metadata attached to it that gives the information.
What is a model? A model is a bit version of a photo.
What's the difference between a raster image and an ASCII representation of a text document? A raster image is a depiction in pixel form while an ASCII representation is a depiction in alphabetic form.
What are filename extensions? What are they used for? Filename extensions are the representations at the end of a file that illustrate what type of file it is and what type of program can open it, such as a .pdf or .doc.
What is lossless representation? What is lossy representation? What are the trade-offs in using each representation? Lossless representation means there is no loss in data, while lossy representation means there may be slight loss in data that is generally unnoticed to the naked eye. The trade-off comes in that the lossy representation is a smaller file, leaving it easier to transfer and faster to interpret.
What is steganography and what is it used for? Steganography is about secret messages, which can be used to help keep private, secure, and sensitive data safe.
What would you have to do to delete a document from your computer so that it could not possibly be read by anyone else? To completely delete data, you would need to delete the document (which moves it to the trash) and then empty the trash (truly deleting it and freeing up the data space).
What is free and open source software? Provide an example. Free and Open Source software is software that is developed by individuals or not for profit groups who wish to share their products without the limitations that come with licensing etc. and allow others to help improve it, such as OpenOffice.
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How has retouching become a controversial issue? Give an example. Retouching has become controversial because magazines have become dependent on it to continually define "perfection."
Would you rather own a camera (or camera phone) with a higher number of megapixels or lower? Explain. Typically I would always have said that I would prefer a camera with more megapixels because it means a clearer and higher resolution photo, but as the megapixel amounts have become so enormous and the differences between the end products so slight that it may not be worth it to have so many large data photos taking up so much space on my camera or phone.
Other than digital images, what might be an example of a computer model? Explain your answer based on the definition of a model. Digital animation would be an example of a computer model, as it portrays or models realistic things in an animated environment through the use of the animation programs.
The code that implements App Inventor is open source and its impact on education is obvious. Find another example of open source software and describe its positive impact on education, business or society. The best example of Open Source software in education would have to be the document creation suites that allowed schools to save money on the expensive Microsoft programs, such as OpenOffice and Google for Education.