Identifying Volatile Memory: RAM Explained

The question asks us to identify which type of memory is volatile. Volatile memory is characterized by its inability to retain stored information when the power supply is interrupted or turned off. Let's examine the options provided:

• ROM (Read-Only Memory): This type of memory is non-volatile. It stores essential system instructions and firmware that the computer needs to start up. The data in ROM persists even when the power is off.
• Hard Disk Drive (HDD) / Solid State Drive (SSD): These are secondary storage devices. They are non-volatile, meaning they permanently store your operating system, applications, and files. Data remains even after the computer is shut down.
• Pen Drive (USB Flash Drive): Similar to hard drives, pen drives use flash memory technology and are non-volatile. They are designed for portable storage and retain data without continuous power.
• RAM (Random Access Memory): This is the computer's primary working memory. RAM is volatile. It holds data and program instructions that the CPU is actively using, allowing for fast access. However, as soon as the computer loses power, all information stored in RAM is erased.

Memory Volatility Comparison

To clarify the difference, here's a comparison:

Therefore, the type of memory that is volatile and loses its contents when the computer is turned off is RAM.