What is volatile memory?

Question

BlackTom AI · Accepted Answer

Volatile memory requires continuous power to preserve stored data — when power is removed, the contents are lost.

1) Relevant knowledge points and concepts
- Volatile vs non-volatile: Volatile memory loses data when power is removed; non-volatile memory retains data without power.  
- Common volatile types: DRAM and SRAM (used for system RAM and CPU cache).  
- Common non-volatile types: HDD, SSD, flash memory, ROM/EEPROM (used for long-term storage and firmware).  
- ROM and firmware (BIOS/UEFI) are typically stored in non-volatile memory so boot instructions persist after shutdown.

2) Step-by-step reasoning
- Identify the definition: The phrase "only stores data while the device is turned on" directly matches the defining property of volatile memory (data retention depends on power).  
- Compare each answer choice to that definition to test fit.

3) Intermediate steps (concept matching)
- Option a describes data retention dependent on device power — matches volatile memory behavior (RAM).  
- Option b says "can save data even if the device is turned off" — that describes non-volatile memory, the opposite of volatile.  
- Option c describes memory that can only be read but not changed — that describes read-only memory (ROM), which is about write capability, not volatility. ROM is typically non-volatile.  
- Option d describes memory that contains boot instructions — that describes firmware (BIOS/UEFI) stored in non-volatile memory, not the volatile property.

4) Why the correct answer is correct
Option a precisely states the defining characteristic of volatile memory: it only retains stored data while power is supplied. This matches standard definitions used in computer architecture and hardware.

5) Why the other options are incorrect
- b is the definition of non-volatile memory (opposite of volatile).  
- c refers to read-only capability, not volatility; ROM can be non-volatile.  
- d refers to where boot instructions are stored (firmware), which is typically non-volatile storage.

6) Conclusion
Therefore, the correct choice is a. Memory that only stores data while the device is turned on, which matches the provided answer.

What is volatile memory?单项选择题

类似问题

Which of the following memory types requires constant refreshing to maintain its contents?

Which of the following memory types requires constant refreshing to maintain its contents?

RAM is Blank ______, meaning it must have constant power to function; its contents are lost when the computer’s electric supply fails.

What means it must have constant power to function; its contents are lost when the computer’s electric supply fails?

Blank ______ refers to a device’s ability to function with or without power.

Which type of memory is volatile, meaning its contents are lost when the power is turned off?

Which type of memory is volatile, meaning its contents are lost when the power is turned off?

Data was not saved before a system was accidentally powered off. This data was located in _____.

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单