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Hardware Interview Questions Answers

Question 1 : How to fix a scratched CD or DVD

Answer 1 : A CD/DVD reader uses a laser beam to read the data on the disk. This laser beam crosses the protective plastic layer and reads the real recording metal layer. If the protective plastic layer is scratched, the laser will be unable to pass resulting in non-readable disc. If somehow we manage to re-smooth this protective layer then the laser will reach the data and read it, now there are many ways we can achieve this using common household items as written below: 1). Toothpaste - Yups! toothpaste, you can use any non-gel based toothpaste for this, just put a very small amount of it on the scratched area and polish it gently using a cotton swab, sometimes the paste may cause new minor scratches but they are just superficial. Now just wash the cd using water. 2). If the above trick does not work try some metal polish like Brasso gently wiping with a soft cotton ball followed by application of Vasaline. 3). Baking Soda - make a small quantity of baking soda paste and apply using a soft cotton cloth buffing the bad scratch. Clean the baking soda before using the disc. 4). You can also try using some oil as a polishing agent this also works many times. there are many daily use products that can be used to get the cd working just keep on experimenting. another trick             Tweak Firefox for Faster Browsing   Type “about:config” in the address bar and press ENTER key. Scroll down and look for the entries below and alter entries as follows: 1. Set “network.http.pipelining” To “true” 2. Set “network.http.proxy.pipelining” To “true” 3. Set “network.http.pipelining.maxrequests” to any number say 25. This settings decides how many concurrent requests/connections the browser can make to a server, Please keep in mind that using a high value can trigger flood control limits on some servers and you can be denied access to the website. 4. 5. Right-click and select New-> Integer. Name the new value “nglayout.initialpaint.delay” and set value to “0?. This value decides the amount of tim

Question 2 : What is the difference between burning and ripping?

Answer 2 : "Ripping" refers to extracting audio files off a CD and copying them to your hard drive. After ripping the audio, you can then convert the files to the more compressed MP3 format if you want. "Burning" refers to the process of writing data onto a CD. You can burn both audio and data CDs, as well as DVDs, provided your computer has a CD/DVD burner.

Question 3 : 20 things you didn't know about Windows XP

Answer 3 : 1. It boasts how long it can stay up. Whereas previous versions of Windows were coy about how long they went between boots, XP is positively proud of its stamina. Go to the Command Prompt in the Accessories menu from the All Programs start button option, and then type 'systeminfo'. The computer will produce a lot of useful info, including the uptime. If you want to keep these, type 'systeminfo > info.txt'. This creates a file called info.txt you can look at later with Notepad. (Professional Edition only). 2. You can delete files immediately, without having them move to the Recycle Bin first. Go to the Start menu, select Run... and type 'gpedit.msc'; then select User Configuration, Administrative Templates, Windows Components, Windows Explorer and find the Do not move deleted files to the Recycle Bin setting. Set it. Poking around in gpedit will reveal a great many interface and system options, but take care -- some may stop your computer behaving as you wish. (Professional Edition only). 3. You can lock your XP workstation with two clicks of the mouse. Create a new shortcut on your desktop using a right mouse click, and enter 'rundll32.exe user32.dll,LockWorkStation' in the location field. Give the shortcut a name you like. That's it -- just double click on it and your computer will be locked. And if that's not easy enough, Windows key + L will do the same. 4. XP hides some system software you might want to remove, such as Windows Messenger, but you can tickle it and make it disgorge everything. Using Notepad or Edit, edit the text file /windows/inf/sysoc.inf, search for the word 'hide' and remove it. You can then go to the Add or Remove Programs in the Control Panel, select Add/Remove Windows Components and there will be your prey, exposed and vulnerable   5. For those skilled in the art of DOS batch files, XP has a number of interesting new commands. These include 'eventcreate' and 'eventtriggers' for creating and watching system events, 'typeperf' for monitoring performance of various subsystems, and 'schtasks' for handling scheduled tasks. As usual, typing the command name followed by /? will give a list of options -- they're all far too baroque to go into here. 6. XP has IP version 6 support -- the next generation of IP. Unfortunately t

Question 4 : What are some examples of computer peripheral devices?

Answer 4 : A computer peripheral, or peripheral device, is an external object that provides input and output for the computer. Some common input devices include: keyboard mouse joystick pen tablet MIDI keyboard scanner digital camera video camera microphone Some common output devices include: monitor projector TV screen printer plotter speakers There are also devices that function as both input and output devices, such as: external hard drives media card readers digital camcorders digital mixers MIDI equipment While these are some of the more common peripherals, there are many other kinds as well. Just remember that any external device that provides input to the computer or receives output from the computer is considered a peripheral.

Question 5 : What is the difference between AGP and PCI graphics cards?

Answer 5 : AGP (Accelerated Graphics Port) cards serve the same purpose as PCI graphics cards. However, the AGP interface, which was created by our buddies at Intel, has become the more popular choice for PCs. Part of the reason for this is that AGP cards manage memory better than PCI cards. The AGP interface can actually use your computer's standard memory as well as the video memory to help boost video performance. So, if you have an AGP slot in your computer, I'd go with an AGP card. If you only have PCI slots, however, a PCI graphics card isn't going to be much different.

Question 6 : How to Speed Up Ur PC?

Answer 6 : Cleaning Ur RAM U may recognize that ur system gets slower and slower when playing and working a lot with ur pc. That's cause ur RAM is full of remaining progress pieces u do not need any more. So create a new text file on ur desktop and call it .. uhm.. "RAMcleaner" or something... Type FreeMem=Space(64000000) in this file and save it as RAMcleaner.vbs [ You may choose the "All Files" option when u save it ] Run the file and ur RAM may be cleaned :> Of course u can edit the code in the file for a greater "cleaning-progress". FreeMem=Space(128000000)

Question 7 : What is the difference between the DVD-R and DVD+R formats?

Answer 7 : DVD-R (pronounced "DVD dash R") and DVD+R (pronounced "DVD plus R") are nearly identical formats. The discs look the same and are both supported by most DVD-ROM drives and DVD burners. The only difference between the formats is the way they determine the location of the laser beam on the disc. DVD-R discs use tiny marks along the grooves in the discs, called land prepits, to determine the laser position. DVD+R discs do not have land prepits, but instead measure the "wobble frequency" as the laser moves toward the outside of the disc. The DVD-R format was developed by Pioneer and was released in the second half of 1997. DVD+R was developed by Sony and Philips and was introduced in 2002. Companies that support DVD-R include Pioneer, Toshiba, Hitachi, and Panasonic, while companies that support DVD+R include Sony, Philips, Hewlett-Packard, Ricoh, and Yamaha. However, most of these companies now develop hybrid DVD drives that support both DVD-R and DVD+R formats. They are known as DVD?R or DVD?RW drives. When looking for media for your DVD drive, make sure it ends in "-R" if you have a DVD-R drive or "+R" if you have a DVD+R drive. If you have a DVD?R drive, you can use either format. DVD-R is still more popular than DVD+R, but since they are both widely supported, it should not matter which format you choose.

Question 8 : Can I replace non-ECC memory with ECC memory?

Answer 8 : ECC (Error Correcting Code) memory is parity memory and non-ECC memory is non-parity. Parity memory has an extra chip on the module that checks for errors in the transfer of information to and from the memory. So if a memory module has an odd number of chips, it is parity RAM. Many motherboards support both ECC and non-ECC memory. Some sources say you can even mix the two types of RAM and the ECC RAM will work as non-ECC memory. However, most memory companies do not support mixing the two types, so try it at your own risk. Since most motherboards will accept ECC memory, it often depends on if your computer's BIOS supports it. You may have to check your computer's manual to find the answer. If you have a choice, non-ECC memory is typically cheaper than ECC memory and works slightly faster. So when in doubt, use non-ECC memory.

Question 9 : What is the difference between Firewire 1394a and 1394b?

Answer 9 : Firewire is a high-speed digital interface that comes in two varieties - 1394a (or just 1394) and 1394b. The 1394a standard (Firewire 400) supports data transfer rates up to 400 Mbps and uses a 6-pin connection. The 1394b standard (Firewire 800) can transfer data up to 800 Mbps and uses a 9-pin connection. An 6-pin to 9-pin adapter can be used to plug a 1394a cable into a 1394b port, but the speed will be limited to 400 Mbps.

Question 10 : Why do videos run slow on my computer?

Answer 10 : First of all, make sure you have the latest driver software for your video card. To get the latest version, you can go to the video card company's web site and download the driver update for free. I would suggest defragmenting the hard drive, since excessive hard disk scanning can prevent smooth audio and video playback. If neither of these options do the trick, try upgrading to the latest version of the software you are using to play the movies. Finally, if that doesn't work, you might just not have enough hardware power to play the video smoothly. That means you need to actually go buy a new video card if you want smooth, high-quality video. Doh.

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