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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)?
When converting analogue speech up to 8 kHz highest frequency, what minimum sample rate is required by the Nyquist theorem to avoid aliasing?
When an image is described as 300 DPI (dots per inch), what does that measure?
Which statement about lossy and lossless compression is correct?
Which of these audio file sizes (uncompressed) is closest for a 3-minute stereo recording at 44,100 Hz and 16-bit depth?
Which statement about UTF-8 is true?
Which image format is best known for lossy compression of photographic images?
An image is 1920 × 1080 pixels with 24-bit colour depth. Approximately how many megabytes (MB) does its uncompressed bitmap use? (1 MB = 2^20 bytes)
A mono audio file has sample rate 44,100 Hz, bit depth 16 bits. Which formula gives its uncompressed file size in bytes for duration T seconds?
What term describes the number of times per second that an analogue sound wave is measured when converting it to digital?
Which of these audio formats is typically lossless?