Flashcards · 0417 · Topic 11

File management flashcards

8 cards on Topic 11, subtopics 11.1 to 11.2. Pick a subtopic or study them all.

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What makes a good file name?: It describes the content, avoids unusual symbols, and may include a version number or date, e.g. Year9_Geography_Draft2.docx.
Save vs Save as: Save overwrites the current file. Save as creates a new file with a different name, location or format, keeping the original.
What is a generic file format? Give examples: A format that many different programs can open, not tied to one manufacturer, e.g. .csv, .txt, .rtf and .pdf.
Why is a backup on the same hard drive not enough?: If the drive fails, both copies are lost. A backup should be on a different device or in a different place, such as an external drive or cloud storage.

Lossless vs lossy compression: Lossless keeps all the data so the original can be rebuilt exactly (ZIP, PNG, GIF). Lossy permanently removes data people are least likely to notice, giving much smaller files (JPEG, MP3, MP4).
Name four ways to reduce a file's size: Compress it; reduce an image's resolution, dimensions or colour depth; crop it or shorten audio and video; reduce the bit rate or sample rate; save in a more efficient format.
How long does a 6 MB file take to send at 12 megabits per second?: 6 MB × 8 = 48 megabits. 48 ÷ 12 = 4 seconds.
Which format suits a logo with flat colours and a transparent background?: PNG: it is lossless, so sharp edges stay crisp, and it supports transparency.