A web developer needs to choose an image format for different parts of a website. Use case Best format Reason Product photograph Company logo with transpare...

Assessment: Computer Science (9-1) 0984 | Paper 1 Mock 01 | Computer Systems Subject: Computer Science (9-1) - 0984

Question 1 Report

A web developer needs to choose an image format for different parts of a website.

Use case	Best format	Reason
Product photograph
Company logo with transparent background
Simple animated icon

(a) Complete the table by recommending a suitable image format and giving a reason. [6]

Answer

Use case	Best format	Reason
Product photograph	JPEG	JPEG is ideal for photographs because it handles the millions of colours and subtle gradients found in real-world images. Its lossy compression produces small file sizes while maintaining acceptable visual quality, which is important for fast-loading web pages. [2]
Company logo with transparent background	PNG	PNG supports an alpha channel for transparency, allowing the logo to be placed on any background colour without a visible rectangle around it. It uses lossless compression, keeping the logo's sharp edges and text perfectly crisp with no quality loss. [2]
Simple animated icon	GIF	GIF supports simple frame-by-frame animation and is widely supported by all web browsers. It is well suited for small, low-colour animated icons with a limited palette of up to 256 colours. [2]

Use case	Best format	Reason
Product photograph	JPEG	JPEG is ideal for photographs because it handles the millions of colours and subtle gradients found in real-world images. Its lossy compression produces small file sizes while maintaining acceptable visual quality, which is important for fast-loading web pages. [2]
Company logo with transparent background	PNG	PNG supports an alpha channel for transparency, allowing the logo to be placed on any background colour without a visible rectangle around it. It uses lossless compression, keeping the logo's sharp edges and text perfectly crisp with no quality loss. [2]
Simple animated icon	GIF	GIF supports simple frame-by-frame animation and is widely supported by all web browsers. It is well suited for small, low-colour animated icons with a limited palette of up to 256 colours. [2]

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