Correct Answer:
C. RAM
Computer memory can be broadly categorized based on its volatility. Volatile memory requires power to maintain the stored information; its contents are lost when the power is turned off. In contrast, non-volatile memory retains its information even without power.
The correct answer is C: RAM (Random Access Memory). RAM is a type of volatile memory used for temporary storage of data and program instructions that the CPU is actively using. Its high speed allows quick access to data, but all information stored in RAM is erased when the computer is shut down or loses power.
- A: ROM (Read-Only Memory) is non-volatile, storing essential boot-up instructions permanently.
- B: Hard disk is a non-volatile storage device, retaining data even when the computer is off.
- D: CD-ROM is also non-volatile, an optical storage medium for permanent data.
Thus, RAM is the only volatile memory option provided.