BIOS
What is BIOS ?
BIOS is one of the three type of softwares available in a computer(Other Two : Operating System,Applications like MS Word,MS Excel...)
What is the full form of BIOS ?
Basic input/output system
What is the work of a BIOS ?
Lload the operating system. When you turn on your computer and the microprocessor tries to execute its first instruction, it has to get that instruction from somewhere. It cannot get it from the operating system because the operating system is located on a hard disk, and the microprocessor cannot get to it without some instructions that tell it how. The BIOS provides those instructions. Some of the other common tasks that the BIOS performs include:
- A power-on self-test (POST) for all of the different hardware components in the system to make sure everything is working properly
- Activating other BIOS chips on different cards installed in the computer - For example, SCSI and graphics cards often have their own BIOS chips.
- Providing a set of low-level routines that the operating system uses to interface to different hardware devices - It is these routines that give the BIOS its name. They manage things like the keyboard, the screen, and the serial and parallel ports, especially when the computer is booting.
- Managing a collection of settings for the hard disks, clock, etc.
In short : The BIOS is special software that interfaces the major hardware components of your computer with the operating system. It is usually stored on a Flash memory chip on the motherboard, but sometimes the chip is another type of ROM.
What is the function of BIOS when you :
Reboot ?
Turn On the computer ?
When you turn on your computer, the BIOS does several things. This is its usual sequence:
- Check the CMOS Setup for custom settings
- Load the interrupt handlers and device drivers
- Initialize registers and power management
- Perform the power-on self-test (POST)
- Display system settings
- Determine which devices are bootable
- Initiate the bootstrap sequence
CMOS :[complementary metal oxide semiconductor (CMOS)] chip : The CMOS Setup provides detailed information particular to your system and can be altered as your system changes. The BIOS uses this information to modify or supplement its default programming as needed. We will talk more about these settings later.
Interrupt Handler : Interrupt handlers are small pieces of software that act as translators between the hardware components and the operating system. For example, when you press a key on your keyboard, the signal is sent to the keyboard interrupt handler, which tells the CPU what it is and passes it on to the operating system.
Compiled by : Mrinmoy Majumder
Problems of adsense
Adsense is known to be a great site for earning a no cost income.Though I have never heard someone really achieving something from Adsense.Adsense is a pay per click programmm.Publisher get some money for a click on the ads.But know one can say what.If you ask adsense,they wil try to explain that it depends upon the amount of impression a site generates or amount of bids for those keywords.But know one say any finite or even an approximate value. Adsense will send their cheque if and only if you earn more than $100.Now that is tough.It will take 4-5 years. But when you think that you are going to cross the $100 mark they will suspend your account without any explanation except you are fraudulently increasing your earning. Actually whenever you will see more than 3% CTR or click through rate be ready for your account to be deleted. Now any visitor to your site can make your CTR more than 3% in 5 minutes.He will click and refresh to achieve that.Result - You are deleted your earning back to the advertiser.You loose your valuable time and waste your webspace.
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SEO
SEO is helping search engines like google to find your site at the top for a search related to your website.
What is a search engine ?
Database where data of website addresses,Titles and descriptions are stored.So that when someone search for a topic he/she can get those websites which have something about the topics.
What is keyword ?
The words searched for.Say you want to know more about laptops.You search 'laptop'.Search engine search its database for some websites containing the word 'laptop'.When it find one it give the web address,description,title as a result.Here keyword is 'laptop'
Search Engine Ranking : Why abc.com will come before xyz.com ?
Different search engines has created different criterias.But the following are common-
presence of keyword,title,proper description
content
number of weblinks
Again many engines have filter properties.It can filter websites with few content,few or large number of links,irrelevant keywords,description.
Now, to optimize :
presence of relevant keyword,description,title is necessary
informative content
weblinks as needed
+linked or linked to your websites i.e. your web address on others website
+activity or traffic