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Computer Hardware

Computer hardware is a general term used to refer to all the physical parts of a computer. Internal hardware devices include hard drives and motherboards, while external hardware devices include monitors, mice, keyboards, and printers.

11,849 Questions

What is the role of the power supply in a computer?

it distributes the electrical curent to the different components of the PC such as DVD rom, external lights, , and the parallel ports where you hook the monitor and keyboards and mouse and of course to the hard drive.

Why device drivers are not needed for optical mouses?

One of the main goals of technology in today's world is to make faster, more efficient, and more easier to use. One of the easiest ways to do this is to make things "plug n play". A lot of hardware that you buy today you can simply plug in, and you're set. No driver CDs to install or manuals to read, its just that simple.

Why the name is given as random access memory?

This is done as because you can access the memory at any random point i-e randomly.

What is the Raid concept?

RAID or Redundant Array of Inexpensive Disks, is a method and technology of using multiple disks for increased size, performance, or redundancy.

Imagine a tree, with each branch a different combination of mirroring, concatenation, striping, and parity. Combine this with hot spares, a high reliability can be achieved.

The mirroring of drives makes them clones of each other, a physical redundancy in the case one dies.

The concatenation of drives makes them appear as one large drive. This reduces redundancy as data is split between drives.

The striping of data across drives, improves performance by dividing work. While one drive is writing, another drive can accept the next data to write. This reduces redundancy as data is split between drives.

Parity is a calculated value, used to reconstruct data when a drive fails. Parity can be striped, or be assigned to a dedicated drive for parity only.

Hot spares are automatically activated, and data is remirrored from the other or reconstructed from parity.

Can you replace your BIOS chip to upgrade your computer?

No, you have to "flash a bios" with the up to date version of the software from the vendors site. This would not be an upgrade per say.

When files saved to an external hard drive are edited can the edited file be saved seperately of the original file or do you lose the original file?

You lose it if you don't rename it. You can open file "funds", edit it, then save it as "funds 1", and you will still have both files. If you just edit and click on "save" you lose the original file. Do a "save as" and rename it. You can either 'Save' which will overwrite the file you have open with the changes you have made. Most applications allow you to 'Save as' where you can save a new file with a different name or different location to the one you have opened. This will leave the original file unchanged, leaving you with 2 files.

What is the difference between rtos and OS what are the advantages and disadvantages of rtos?

an RTOS is much better than anormal OS because it is time sensitive, fault tolerable and allow multiprocessing. that are not supported by all OSs

A real-time operating system is intended for systems that need to tightly control responsiveness and performance. With an RTOS you can prioritize operations such that the most critical areas of the application get control of the processor exactly when they need it. All other lower priority operations are paused.

An RTOS also gives you all of the other advantages of an OS:

  • a consistent coding platform
  • a rich set of APIs to save coding time and errors
  • processor housekeeping functions
  • hardware abstraction

What is the function of Plug and Play?

In computer terminology, this term means a device that can be installed into a computer without being configured and that won't cause hardware conflicts.

The function PLug and PLay is a procedure the computer attempts to perform when you first plug a USB device into your computer. If you have Windows Vista, the plug and play works everytime you connect any device. Any operating system earlier than Vista will only plug and play fewer devices depending on your service pack and the software updates. Devices such as Cellular Phones and MP3s need to be manually installed using the provided software install disk. PLug and PLay does not support LPT port devices and standard PS/2 mice and keyboards. Your computer automatically uses those ports as long as there is something plugged into it.

How do you restore the original computer system?

You can usually perform a factory reset by pressing F8 to get to the restore menu on the computer. This will restore the computer back to factory.

What is universal serial bus port?

The Universal Serial Bus (USB) port is an input/output port that allows the transfer of data from the computer's hard drive to the portable hard drive (e.g. flash drive). The port serves as the communication mechanism between the two hard drives.

Will an SD Card work in a CF microdrive slot?

An SD Card will not work in a Compact Flash or Microdrive slot. You need to have an SD Card drive slot or a multi format memory reader which is compatible with SD Cards.

How do you partition a system partition?

You can do it in 2 ways:

1:you can try disk management,You can change/make partitions on your hard disk even when there are still files on it

2:you can try three party partition manager software,like as gaprted, MiniTool partition wizard and so on.

What is the difference between ultra violet alpha and ultra violet beta rays?

Ultraviolet is low energy light. Alpha particles are helium nucleii ejected from the nucleus of a heavy element during radioactive decay. Beta particles are electrons (or positrons) ejected from the nucleus of an element during radioactive decay.

There is no such thing as "ultra violet alpha and ultra violet beta" rays.

How do you build a computer tower?

its not reel hard i built one when i was 11 first you need a mother board, hard drive, floppy drive, disk drive, power thing, and a power cord http://www.youtube.com/watch?v=94krVqiwhV8 try this also it could help you see

How do you set up Ethernet powerline adaptor?

There's not much you really have to do. They're plug and play. If you have the 85 Mbps or the 14 Mbps adapters, it's a good idea to run the software to setup a password on each. On my netgear kit, the software that comes with it has a security tab. When I go to that tab, I have to set the remote device first, and then set the the same password on the local device as I did on the remote device. If you set the local device first, you lose communication between powerline devices. The computer can always talk to the local device, but the local device cannot always talk to the remote device when the passwords are different. If you do mess up, just swap them and then you can set the password on the other device.

If you are using the 200 Mbps like I am, there are push button security buttons. Hold it in for 2 seconds. Now within 2 minutes you have to press and hold the second adapter's security button in for 2 seconds.

The software that comes with it is now a driver. You just plug them in and go. It's just a good idea to setup security which you will never have to do again once you do it the first time.

Other than that, you only need the setup software if you have 3 or more powerline adapters and want to setup quality of service.

Full form of switch mode power supply?

An auto-switching power supply is one which can switch between power inputs instantaneously, preventing a loss of current to the machine.

These power supplies may have redundancy built into them (in effect, they may be one or more traditional power supplies built to work together), or they may not. the key is that they have multiple power inputs (usually in the form of two or more power cords), and can chose which ones to draw power from.

How long can a memory be stored in a random access memory?

Indefinitely, as long as power is not removed from the system. Once power is removed, all address locations in RAM revert to their default state.

What kind of batteries are there today?

For cameras there are mainly the AA batteries or the lithium ion battery pack that is rechargeable. The AA batteries are rechargeable as well, but the lithium ion are just more convenient.

What is a tower in a computer?

A tower is the "cpu" part of the whole computer system that a user would have setup. Ie there's the monitor (sits on your desk), the speakers, mouse/keyboard, and the "tower" that sits under the desk(usually). It's the part of the computer system that all the cables connect into. It contains the computer case, power supply, motherboard, central processor, hard drives, video cards, etc. That's the tower. Some computers today are built without towers and everything is integrated into one device similar to a laptop but larger and not as mobile.

What do you mean by parity in RAID?

In computers, parity (from the Latin paritas: equal or equivalent) refers to a technique of checking whether data has been lost or written over when it's moved from one place in storage to another or when transmitted between computers.If you lose any one of the "N+1" pieces of data, you can recreate it from the "N" that remain, ... This property is exploited for parity calculation under RAID. ... This means a hardware controller that performs these calculations is required for high.

Asheesh jain

New Delhi