Which of the following is an example of volatile memory?

Volatile memory is characterized by its ability to hold data only while it is powered on. Once the power is lost, all information stored in volatile memory is erased. Dynamic Random Access Memory (DRAM) is a prime example of volatile memory because it requires constant power to maintain the stored information. This type of memory is primarily used in computers for temporary data storage while applications are running.

In contrast, devices like a Hard Disk Drive (HDD) or Flash Memory are examples of non-volatile storage. They retain data even when the power is turned off. Read-Only Memory (ROM) also retains its contents without power and is typically used for firmware that does not change frequently. Thus, the nature of DRAM as a temporary, power-dependent storage medium solidifies its role as volatile memory.