computer knowleage

   C entral processing unit A central processing unit, also called a central processor, main processor or just processor, is the electronic circuitry that executes instructions comprising a computer program. The CPU performs basic arithmetic, logic, controlling, and input/output operations specified by the instructions in the program.   Description एक सेंट्रल प्रोसेसिंग यूनिट बुनियादी गणित, तार्किक, नियंत्रण और इनपुट / आउटपुट के संचालन के निर्देश के द्वारा निर्दिष्ट प्रदर्शन से एक कंप्यूटर प्रोग्राम के निर्देशों से बाहर किया जाता है कि एक कंप्यूटर के भीतर इलेक्ट्रॉनिक विद्युत्-परिपथ तंत्र है।  

  What is a computer? A computer is a device that accepts information (in the form of digitalized data) and manipulates it for some result based on a program, software, or sequence of instructions on how the data is to be processed.

                  What is an instruction set? An instruction set is a group of commands for a central processing unit ( CPU ) in machine language. The term can refer to all possible instructions for a CPU or a subset of  instructions  to enhance its performance in certain situations. All CPUs have instruction sets that enable  commands  directing the CPU to switch the relevant transistors. The instructions tell the CPU to perform tasks. Some instructions are simple read, write and move commands that direct data to different hardware elements. The instructions are made up of a specific number of  bits . For instance, The CPU's instructions might be 8 bits, where the first 4 bits make up the operation code that tells the computer what to do. The next 4 bits are the operand, which tells the computer the data that should be used. The length of an instruction set can vary from as few as 4 bits to many hundreds. Different instructions in some instruction set architectures (ISAs) have di