You are given a passage. You need to construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) its answer is the whole paragraph. Avoid creating questions that can be answered correctly without actually understanding the paragraph.

Example input: Optical mice use an LED and a camera to rapidly
capture images of the surface beneath the mouse.
The infomation from the camera is analyzed by a
DSP (Digital Signal Processor) and used to detect
imperfections in the underlying surface and
determine motion. Some materials, such as glass,
mirrors or other very shiny, uniform surfaces
interfere with the ability of the DSP to
accurately analyze the surface beneath the mouse.

Since glass is transparent and very uniform, the
mouse is unable to pick up enough imperfections in
the underlying surface to determine motion.
Mirrored surfaces are also a problem, since they
constantly reflect back the same image, causing
the DSP not to recognize motion properly. When the
system is unable to see surface changes associated
with movement, the mouse will not work properly.
Example output: why doesn't an optical mouse work on a glass
table?
Example explanation: The passage talks about the glass and mirror surfaces beneath the optical mice and how the mouse is unable to pick up enough imperfections in the underlying surface to determine motion. The last line of the passage explains why the mouse will not work properly on these surfaces. Thus it is a positive example.
Q: Since the main memory (RAM) is expensive, it usually has lesser capacity than the hard drive. However, the problem with that is the RAM gets filled quickly with all your running programs. However, the CPU (processor) multi-tasks, hence it doesnt need the programs (data and instruction words in the RAM) all the time. Thats where the virtual memory comes into picture. Virtual memory is basically part of the drive which is used as a temporary "parking space" for data and instruction words which can't be held in the RAM. When programs are no longer requred they are "swapped" to the hard drive from the RAM and shuttled back to the RAM when the CPU gets ready to process them (depending upon the scheduling algorithm).

You are getting the error because you have assigned less virtual memory (or the system has assigned less vitual memory). Hence, when the RAM gets full, its doesn't get any "parking space" on the hard drive and you get the error.

In order to bump up the virtual memory and improve system performance, view the following page. It is really helpful!
A:
what is vitrual memory?after about 20 mins, pc pops up with this message vitrual memory low, what can i do?