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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

What is quantisation error in digital audio?
How many different amplitude levels can be represented by a 16-bit audio sample?
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 formats is typically lossless?
What term describes the number of times per second that an analogue sound wave is measured when converting it to digital?
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 of the following is a correct method to compute the uncompressed size in bytes of a colour bitmap image?
Which graphic type stores shapes and mathematical descriptions that can be scaled without loss of quality?
How many bytes are required to store the ASCII text string "CAT" (three characters) using extended ASCII (8-bit per character)?
How many possible colours are available in a 16-bit colour image (commonly 5-6-5 RGB)?
When an image is described as 300 DPI (dots per inch), what does that measure?