A Level Computer Science OCR Practice Exam

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Which statement best describes RAM's volatility?

RAM can store data permanently.
RAM's contents are lost when power is off.
RAM is always fixed and cannot be altered.
RAM maintains data even with power loss.

The correct answer is: RAM's contents are lost when power is off.

The statement that RAM's contents are lost when power is off accurately describes its volatile nature. Volatility in the context of computer memory refers to the ability of a memory type to retain information when it is not powered. RAM, or Random Access Memory, is designed for temporary storage while a computer is running, which allows for fast read and write operations that support active processes. However, once the power is turned off, RAM does not have the capability to retain any data it held, resulting in loss of any information stored. In contrast, other forms of storage, like hard drives or solid-state drives, are non-volatile, meaning they preserve data even when power is off. Therefore, the unique characteristic of RAM being volatile is crucial for its role in computing, as it ensures quick access and responsiveness without retaining data post-shutdown.