A Level Computer Science OCR Practice Exam

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Prepare for the A Level Computer Science OCR Exam with interactive quizzes. Test your knowledge across diverse topics with questions and detailed explanations. Ace your exam!

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Which memory type is known for quick access and large storage but can become expensive?

Optical Memory
Read Only Memory (ROM)
Random Access Memory (RAM)
Magnetic Memory

The correct answer is: Random Access Memory (RAM)

The correct answer is Random Access Memory (RAM). This type of memory is characterized by its ability to provide fast access to data, making it essential for tasks that require quick read and write capabilities, such as running applications and processing data in real-time. RAM is volatile, meaning it loses its data when the power is turned off, which is a trade-off for its speed. Another important aspect of RAM is its size; modern systems often utilize several gigabytes (GB) or more, allowing them to handle multiple tasks and large applications efficiently. However, the cost of RAM can be higher compared to other memory types, especially when larger capacities are required or when higher-performance RAM modules are utilized. Therefore, its combination of quick access times, substantial storage capabilities, and potentially higher costs elucidates why this is the correct answer.