What is RAM (Random Access Memory)

Random Access Memory

      I know everyone aware of what RAM, but not everyone has a deep understanding about RAM. Oh I have like 1 Gig of RAM in my old computer but my laptop has 8 Gigs of RAM. So why is it better to have More RAM? Well, with more RAM your computers and smartphones can do more things and run more programs at the same time... well we all know that.. But most people can't really explain RAM beyond that point, so that's where I will try to helps little bit. 

      Lets just divide memory into two categories. The first type of memory is one which can hold data when there's no electricity running through it. This includes different types of flash drives. You can carry it around and plug it into any computer and it still holds all your data. The second type of memory is one which loses all its data when there's no power attached to it. Also called as volatile memory and RAM is one type of volatile memory, when there's no electricity, the RAM is Empty. So when you first power up your computer, RAM is really empty but the hard disk contains all the programs and games waiting to be run. 

     The processor can only run the program fits present on the RAM. If your computer boots up and RAM is empty, how does the processor run anything? Okay, I lied a little bit, the computer processor can run a little bit of software that doesn't have to be present on RAM. Right when your computer boots up, BIOS looks for the Operating System inside the hard disband it takes out the OS and puts it on the RAM. 

      Now operating system loads up and you can run any program but first you have to go in the flash memory and bring the program to RAM. So lets load google chrome in memory, i can load counter strike in memory. And now I want to load Photoshop but there's no room so we have to make some space by removing counterstroke. And then we can load Photoshop. So this is why having a larger RAM is better. You can fit more software that can be run by the processor at the same time. And you don't have to go back to your SLOW hard drive or flash memory to get any of your programs. 

      The process in which you move the programs in and out of memory and slow hard drive, that process is known as paging and its really slow. So when you press CTRL ALT DEL or Android task killer, what you are really doing is just taking out the unnecessary programs from the memory and making space for new programs. 

Computer Input and Output Devices

A)  Input Devices

1.  Key Board  :-

The keyboard acts as an input device. The keyboard has 101 or 114 keys. The keyboard translates information to the computer into the language of the computer and sends it to the computer.

2.  Mouse  :-

The mouse is also an input device. There are mainly three buttons on the mouse. 1. Left side 2. Right side 3. Scrolling button. With the help of mouse you can easily reach anywhere on the computer screen. It is a Pointing Devices. The main principal it work on point and click.

3.  Scanner  :-

Using this scanner device, you can scan your photos or documents and create a digital image on a computer.

4.  Touch Screen  :-

This type of screen is used in devices like mobile, tablet or ATM devices

5.  Joystick  :-

The joystick is a device you use to play computer games. With the help of the buttons on the joystick, we work to direct the computer.

B)  Out Put Devices 

1.  Monitor  :-

The monitor in a computer is called a Visual Display Unit (VDU). This is an output device. Nowadays flat monitors or LCD / LED monitors are used. The monitor works to show you both input and output.

2.  Printer  :-

The tools used to print computer generated documents or information retrieved from the Internet on paper are called printers. Printed text is called hard copy. There are many types of printers.

• Dot Matrix Printer
• Laser Printer
• Inkjet Printer
• Plotter

3.  Speaker  :-

A speaker is an external device that allows you to hear video or audio playing on a computer, so it is called an output device.

How to Make Desktop Icons Bigger Size

How to Make Desktop Icons 

Large, Medium, Small Size

Right-click somewhere on the empty space on your Desktop.

Click on View Tap. It's at the top of the menu.

The first three options you get are 

Large icons, Medium icons, and Small icons.

Click on "Large Icons"

Now you have made the icons your desktop bigger Size.

How to install Virtual Box on Windows 7, 8, 10

Install Virtual Box on Windows Machine

First, click the download link and download Windows Software.

https://www.virtualbox.org/wiki/Downloads

Than double click on Virtual box EXE software file and Click Run Button.

Now Click Next Button.

Select the way you want features to be installed and click Next button. 

Final click the Install button and Finish.

And double click Virtual box Shortcut Icon on Desktop and open the Software

What is Virus? - How to protect your computer from Viruses?

Virus Information

What is Virus?

Virus is a software program that interferes with the normal operation of your computer. It can corrupt data files and command files on your computer.

a)  Blow up files on a computer or fill in unnecessary text and increase its size.

b)  Viruses can corrupt Software Program and Applications on your computer and your computer is more likely to hang or slow down frequently.

c)  Virus can come to your computer from a PEN drive, CD drive, Memory card or Internet.

d)  There are two types of viruses

1. Boot virus   : - Boot viruses damage the boot sector, making it impossible to read information on your disk.

2. Files Virus  : - Files Virus corrupts files with COM or EXE extensions.

How to protect your computer from viruses?

You need to have an Anti-virus program installed on your computer to protect your computer from viruses. An anti-virus program scans all the files on your computer, detects the virus and deletes it.

Anti-virus Software: -  Quick Heal, Net Protector, Norton Anti-virus