Gce Model Questions Vol1 2021 Computer Studies Question 5

Practice essay / theory question 5 from the 2021 Gce Model Questions Vol1 Computer Studies examination. This question covers Data representation, File formats, Storage management, Bandwidth calculation .

Gce Model Questions Vol1 2021 Computer Studies Essay / Theory
Topics: Data representation File formats Storage management Bandwidth calculation
Question 5 GCE_MODEL_QUESTIONS_VOL1 • 2021 • COMPUTER_STUDIES • essay

An online retailer stores product images in three possible file formats: JPEG, PNG and GIF. For a typical 800 × 600 pixel image the average file sizes are 150 KB (JPEG), 250 KB (PNG) and 200 KB (GIF). The retailer expects to host 12 000 product images. The website has a monthly bandwidth limit of 2 GB. Each image is downloaded on average 30 times per month. PNG supports transparency, which is required for 20 % of the images. Determine which format(s) should be used for the images and calculate the total storage required and the total monthly bandwidth consumption. Justify your choice.

Question Parts

( a )
If all 12 000 images were stored in each format separately, calculate the total storage required for JPEG, PNG and GIF.
( b )
For each format, calculate the total monthly bandwidth consumption assuming every image is downloaded 30 times per month.
( c )
Considering that 20 % of the images (i.e., 2 400 images) require transparency, propose a suitable mix of formats that satisfies the transparency requirement while keeping total monthly bandwidth within the 2 GB limit.
( d )
Based on the mix proposed in part (c), compute the total storage required for the 12 000 images.

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About This Question

This is Gce Model Questions Vol1 2021 Computer Studies Question 5. It is one of the essay questions from the 2021 Gce Model Questions Vol1 Computer Studies examination.

The question covers Data representation, File formats, Storage management, Bandwidth calculation .

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