If the computer suddenly loses power, what data will be lost?

If the computer suddenly loses power, all the data in the RAM random access memory will be lost; when the power is turned off, the RAM cannot retain data; the working characteristic of the RAM is that after power is turned on, data information can be accessed at any location at any time. Internal information also disappears after a power outage.

If the computer suddenly loses power, the data in the RAM random access memory will be lost.

Memory is a device or component used in digital systems to store large amounts of information. It is an important part of computers and digital devices. Memory can be divided into two categories: random access memory (RAM) and read-only memory (ROM).

Random access memory (RAM) can both store information into and read out information from designated units. Any information stored in RAM will be lost when the power is turned off, so RAM is volatile memory.

ROM is read-only memory. In addition to fixed storage of data, tables, and firmware programs, it is also widely used in combinational logic circuits.

Characteristics of RAM random access memory

1. Random access

The so-called "random access" refers to when the memory When data is read or written, the time it takes has nothing to do with where the information is located or where it is written. In contrast, when reading or writing information in a Sequential Access storage device, the time and location required are related. It is mainly used to store the operating system, various applications, data, etc.

When RAM is working normally, data can be read from RAM or written to RAM. Compared with ROM, RAM has the advantages of easy reading/writing and flexible use. It is especially suitable for situations where data is frequently and quickly changed.

2. Volatility

RAM cannot retain data when the power is turned off. If data needs to be saved, they must be written to a long-term storage device (such as a hard drive).

The working characteristic of RAM is that after power is turned on, data information can be accessed at any location at any time, and the internal information will disappear after power is turned off.

3. Sensitive to static electricity

Like other delicate integrated circuits, random access memory is very sensitive to electrostatic charges in the environment. Static electricity can interfere with the charge of the capacitors in the memory, causing data loss or even burning out the circuit. Therefore, before touching the random access memory, you should first touch the metal ground with your hand.

4. Access speed

Modern random access memory has almost the fastest writing and reading speeds among all access devices. The access delay is comparable to other storage devices involving mechanical operation. Compared to that, it seems insignificant.

5. Need to be refreshed (regenerated)

Modern random access memory relies on capacitors to store data. A fully charged capacitor represents a 1 (binary), and an uncharged capacitor represents a 0. Since capacitors have leakage to some extent, data will gradually be lost over time if no special treatment is taken. Refreshing means periodically reading the status of the capacitor and then recharging the capacitor according to its original status to make up for the lost charge. The need to refresh explains exactly the volatile nature of random access memory.

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