Compression (OCR GCSE Computer Science): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is the main purpose of compression?
What is the main purpose of compression?
To reduce file size
What is a key characteristic of lossy compression?
What is a key characteristic of lossy compression?
It permanently removes some data
Which of these is an example of lossy compression?
Which of these is an example of lossy compression?
JPEG
What is a disadvantage of lossy compression?
What is a disadvantage of lossy compression?
Quality reduction may be noticeable
What does lossless compression do?
What does lossless compression do?
Reduces size without losing any data
Which file format uses lossless compression?
Which file format uses lossless compression?
PNG
How does lossless compare to lossy compression?
How does lossless compare to lossy compression?
Less reduction in file size
How many colors can 4 bits of color depth store?
How many colors can 4 bits of color depth store?
16 colors
What is the effect of higher resolution on file size?
What is the effect of higher resolution on file size?
Larger file size
What is metadata in an image?
What is metadata in an image?
Extra info like resolution and format
What happens when you increase both color depth and resolution?
What happens when you increase both color depth and resolution?
Better quality and larger file size
A pixel image with 8-bit color depth has what file size in bytes?
A pixel image with 8-bit color depth has what file size in bytes?
10,000 bytes