Some Things about Android

• WHAT IS ROM

Short for Read-Only Memory , ROM is a storage medium that is used with computers and other electronic devices. As the name indicates, data stored in ROM may only be read. It is either modified with extreme difficulty or not at all. ROM is mostly used for firmware updates. A simple example of ROM is the cartridge used with video game consoles , which allows one system to run multiple games. Another example of ROM is EEPROM , which is a programmable ROM used for the computer BIOS, as shown in the picture below

• What is kernel

kernel is the core component of an operating system. Using interprocess communication and system calls, it acts as a bridge between applications and the data processing performed at the hardware level. When an operating system is loaded into memory, the kernel loads first and remains in memory until the operating system is shut down again. The kernel is responsible for low-level tasks such as disk management, task management and memory management short way kernel is communicate hardware or software

• What Is Bootloder

Bootloader is a piece of code that runs before any operating system is running. Bootloader are used to boot other operating systems, usually each operating system has a set of bootloaders specific for it. Bootloaders usually contain several ways to boot the OS kernel and also contain commands for debugging and/or modifying the kernel environment. In this talk we will concentrate on Linux bootloaders. Since it is usually the first software to run after powerup or reset, it is highly processor and specific

• What Is Ram

Random Access Memory provides space for your computer to read and write data to be accessed by the CPU (central processing unit). When people refer to a computer's memory, they usually mean its RAM. If you add more RAM to your computer, you reduce the number of times your CPU must read data from your hard disk. This usually allows your computer to work considerably faster, as RAM is many times faster than a hard disk. RAM is volatile, so data stored in RAM stays there only as long as your computer is running. As soon as you turn the computer off, the data stored in RAM disappears. When you turn your computer on again, your computer's boot firmware (called BIOS on a PC) uses instructions stored semi-permanently in ROM chips to read your operating and related files from the disk and load them back into RAM

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