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A Bit Is a Digit in the Binary Number System. It Can Have Two Values, 0 Or 1

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A Bit Is a Digit in the Binary Number System. It Can Have Two Values, 0 Or 1 Definition: A Bit is a digit in the binary number system. It can have two values, 0 or 1. In computer RAM and ROM memory, a bit is a small electrical switch which is either on (value 1) or off (value 0). However bits don't exist individually but in groups of 8 and that is a byte. So one Kilobyte of RAM = 1024 bytes or 8192 bits. A bit (short for binary digit) is the smallest unit of data in a computer. A bit has a single binary value, either 0 or 1. Although computers usually provide instructions that can test and manipulate bits, they generally are designed to store data and execute instructions in bit multiples called bytes. In most computer systems, there are eight bits in a byte. The value of a bit is usually stored as either above or below a designated level of electrical charge in a single capacitor within a memory device. Half a byte (four bits) is called a nibble. In some systems, the term octet is used for an eight-bit unit instead of byte. In many systems, four eight-bit bytes or octets form a 32-bit word. In such systems, instruction lengths are sometimes expressed as full-word (32 bits in length) or half- word (16 bits in length). In telecommunication, the bit rate is the number of bits that are transmitted in a given time period, usually a second A byte is the smallest unit of storage that can be accessed in a computer's memory- either in RAM or ROM. It holds exactly 8 bits. In binary 28 = 256. That is a byte can hold one of 256 distinct values ranging from 0 to 255. In Hexadecimal notation that is 00 to FF. In older computers, one byte was sufficient to hold one 8 bit character. These days, especially on .NET or international versions of Win 32, 16 bits is needed. What is the difference between primary & secondary storage device? Answer # 3 PRIMARY STORAGE DEVICES SECONDARY STORAGE DEVICES 1.These devices are tempo- 1.These devices are permanent. rary. 2.These devices are expensive. 2.These are cheaper. 3.These devices are faster, 3.These devices Computers via therefore expensive. cables,and slow, therefore cheaper. 4.These devices have less 4.These devices have high storage capacity. storage capacity. 5.These devices refer to RAM. 5.These devices refer to FDD Differentiate between RAM and ROM? RAM is an acronym for Random Access Memory and ROM is an acronym for Read Only Memory and each has become a vital element in today¶s computer system. Random access memory is used for a number of reasons and its necessity has grown over the years. With the design of more complex systems and software the necessity for larger amounts and faster speeds of memory have grown. RAM offers a very fast memory access. This is the memory that computer programs load data to when they are running and need quick access to ensure smooth operation. When the computer is turned off all the data in RAM is wiped. It may be wiped at various times during operation too. ROM, or read only memory, is generally slower than RAM. Most computer systems have a far greater amount of ROM than they have of RAM. Read only memory is the memory that software and data files are written into. This memory exists in the form of a hard drive in most systems, while RAM exists in the form of chips. Your system has to have sufficient ROM to hold the operating system and the programs you use. Speed remains important though since the program must be loaded from the ROM to the RAM. This memory remains when you turn the computer off, though it is constantly updated while the computer is on. For example each time you save a file or install or remove software, ROM is updated. There is one interesting application of ROM that has no real parallel in RAM. ROM can be used as virtual Read more: Difference Between RAM and ROM | Difference Between | RAM vs ROM http://www.differencebetween.net/technology/difference-between-ram-and-rom/#ixzz14j43cgyl .
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