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Tutor HuntTest QuestionsComputing QuestionsYear 10 Computing Questions

 

Text, Sound And Images (GCSE Computing)

The following is a GCSE Computing test covering 'Text, Sound And Images' from the broader topic 1. Data Representation. The test is geared towards the CAMBRIGE-IGCSE exam board style syllabus.
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Below a typical questions that will be covered in this test. You final score will be logged on your account

How many possible colours are available in a 16-bit colour image (commonly 5-6-5 RGB)?
What is a main advantage of Unicode compared with ASCII?
Which of the following is a correct method to compute the uncompressed size in bytes of a colour bitmap image?
Which compression method is especially effective for simple images with long runs of the same colour (e.g., scanned text or icons)?
Which of these audio file sizes (uncompressed) is closest for a 3-minute stereo recording at 44,100 Hz and 16-bit depth?
If you halve the sample rate of a digital audio file (keeping bit depth and channels the same), what happens to the raw file size?
What term describes the number of times per second that an analogue sound wave is measured when converting it to digital?
What is quantisation error in digital audio?
Which graphic type stores shapes and mathematical descriptions that can be scaled without loss of quality?
For a black-and-white image using 1 bit per pixel (1 = black, 0 = white) with resolution 800 × 600, what is the uncompressed file size in kilobytes (KB)? (1 KB = 1024 bytes)
Which image format is best known for lossy compression of photographic images?