A Level Computer Science OCR Practice Exam

In which scenario is a GPU most effective?

1. Complex database transactions

2. Real-time 3D rendering in gaming

3. Running standard office applications

4. Creating simple web pages

The correct answer is: Real-time 3D rendering in gaming

A GPU (Graphics Processing Unit) is most effective for tasks that require parallel processing capabilities, where many calculations can be performed simultaneously. Real-time 3D rendering in gaming fits this scenario perfectly because it involves rendering complex graphics and visual effects in real time, which demands high computational power. The parallel architecture of a GPU allows it to handle thousands of threads simultaneously, which is essential for processes like shading, texture mapping, and polygon rendering involved in creating realistic gaming experiences. In contrast, complex database transactions typically require sequential processing and are better suited for CPUs, which handle tasks with complex logic and high levels of data integrity. Running standard office applications and creating simple web pages involve relatively straightforward tasks, such as word processing and basic coding, which do not require the massive parallel processing power that a GPU provides. In these cases, a CPU is efficient enough and more appropriate since the demands are minimal compared to gaming graphics rendering.