Which of the following is an example of nonvolatile memory? DRAM Flash memory Cache memory
The Correct Answer and Explanation is:
The correct answer is Flash memory.
Explanation:
Nonvolatile memory is a type of memory that retains its stored data even when the power supply is turned off. Unlike volatile memory, which loses all data once the power is cut, nonvolatile memory is designed to maintain the integrity of its data, making it ideal for applications where data persistence is critical.
- DRAM (Dynamic Random Access Memory):
DRAM is a type of volatile memory. It requires continuous power to maintain the stored data. Once power is lost, all the information stored in DRAM is erased. DRAM is commonly used as system memory in computers for temporary storage of data during operation, but it does not qualify as nonvolatile memory. - Flash memory:
Flash memory is a type of nonvolatile memory. It is widely used in USB drives, SSDs (Solid State Drives), memory cards, and other storage devices. Flash memory retains data even when the power is turned off, making it ideal for long-term storage of information. It is built on NAND and NOR technology, where data can be written, read, and erased electrically. Flash memory is commonly used in applications where data retention and fast access are important, such as in mobile phones, laptops, and digital cameras. - Cache memory:
Cache memory is a type of volatile memory that stores frequently accessed data to speed up processing by the CPU. It is extremely fast but does not retain data when the power is lost. Cache memory is used in the processor to reduce the time needed to access data from the main memory (RAM), but it cannot be considered nonvolatile.
In summary, Flash memory is the only example of nonvolatile memory from the options provided. It preserves its data without requiring constant power, making it suitable for long-term storage and portable data devices.
