Which image format is commonly used for web graphics?

• A. PNG
• B. GIF
• C. JPEG
• D. BMP

Answer: (C)

The JPEG format is widely used for web graphics, particularly for photographs and images with complex color gradients. This is due to its ability to compress large image files significantly while maintaining a reasonable level of quality, which helps with faster loading times on web pages. JPEG achieves this through lossy compression, which reduces file size by discarding some image data, making it particularly effective for images where subtle color transitions are not as critical.

While other formats like PNG and GIF have their specific uses—such as PNG being favored for images requiring transparency and GIF being suitable for simpler images and animations—they generally do not match the widespread utility of JPEG for detailed photographic images on the web. BMP, on the other hand, is not typically used for web graphics because it produces larger file sizes without compression, which is not efficient for online use. Therefore, JPEG remains the most common choice for web graphics, particularly when an optimal balance between quality and file size is necessary.