What computer device stores applications and data only when the computer is turned on?

RAM (Random Access Memory) is the hardware in a computing device where the operating system (OS), application programs and data in current use are kept so they can be quickly reached by the device's processor.

Read in-depth answer here. Similarly, you may ask, what devices does a computer need to process data?

In computing, an input device is a peripheral (piece of computer hardware equipment) used to provide data and control signals to an information processing system such as a computer or other information appliance. Examples of input devices include keyboards, mice, scanners, digital cameras and joysticks.

Similarly, what holds the programs and data a computer is currently running? This control center, called the central processing unit (CPU), is a highly complex, extensive set of electronic circuitry that executes stored program instructions. All computers, large and small, must have a central processing unit.

Keeping this in view, which device stores data only temporarily and only when the computer is running?

The RAM sticks are for the processor to store the data programs need while they are running, but are unnecessary after you exit the programs. Even though they are only for temporary data, having a sufficient amount of RAM for your computers' workload is essential for them to run properly.

What type of memory stores software programs and instructions while the computer is turned on?

When you turn on the power to a computer, the first program that runs is usually a set of instructions kept in the computer's read-only memory (ROM). This code examines the system hardware to make sure everything is functioning properly.