When a Process is executed by the CPU and when a user Request for another Process then this will create disturbance for the Running Process. This is also called as the Interrupt. [Read more…] about Interrupt – What is Interrupt? Types of Interrupts.
What is RAM parity?
Definition of parity memory: Some Random Access Memory (RAM) chips have built-in error-checking functions that use a process called parity. Chips that use parity have an extra bit for every eight bits of data. In the parity process, as the eight bits receive binary data (data represented by 1s and 0s), the chip adds all the 1s, and if that total is odd, the extra bit is set to 1.The most common data error-checking and validation technique is the Vertical Redundancy Check (VRC) often called a parity check. [Read more…] about What is RAM parity?
SemiConductor Memory – What is SemiConductor Memory?
A device for storing digital information that is fabricated by using integrated circuit technology. Also known as integrated-circuit memory; large-scale integrated memory; memory chip; semiconductor storage; transistor memory. [Read more…] about SemiConductor Memory – What is SemiConductor Memory?
Primary Storage – What is Primary storage?
Primary Storage, also known as main storage or memory, is the main area in a computer in which data is stored for quick access by the computer’s processor. Information must be transferred to primary storage. On today’s smaller computers, especially personal computers and workstations, the term random access memory (RAM) – or just memory – is used instead of primary, main storage, core memory, or immediate access storage, internal storage, and the hard disk, diskette, CD, and DVD collectively describe secondary storage or auxiliary storage. [Read more…] about Primary Storage – What is Primary storage?
Sequential Access Memory (SAM) – Definition
In computing, Sequential Access Memory (SAM) is a class of data storage devices that read their data in sequence. This is in contrast to random access memory (RAM) where data can be accessed in any order. Sequential access devices are usually a form of magnetic memory. [Read more…] about Sequential Access Memory (SAM) – Definition
Bubble memory – What is Bubble memory?
Bubble memory is a type of non-volatile computer memory that uses a thin film of a magnetic material to hold small magnetized areas, known as bubbles or domains, each storing one bit of data. Andrew Bobeck invented the Bubble Memory in 1970. His development of the magnetic core memory and the development of the twister memory put him in a good position for the development of Bubble Memory. [Read more…] about Bubble memory – What is Bubble memory?
OMR – What is Optical Mark Recognition (OMR)?
Optical Mark Recognition (OMR) is the technology of electronically extracting intended data from marked fields, such as check boxes and fill-in fields, on printed forms. It is generally distinguished from OCR by the fact that a recognition engine is not required. This requires the image to have high contrast and an easily-recognizable or irrelevant shape. [Read more…] about OMR – What is Optical Mark Recognition (OMR)?
MICR – What is Magnetic Ink Character Recognition(MICR)?
Magnetic Ink Character Recognition (MICR) is a technique that enables special characters printed in magnetic ink to be read and input rapidly to a computer. When a document that contains this ink needs to be read, it passes through a machine, which magnetizes the ink and then translates the magnetic information into characters. [Read more…] about MICR – What is Magnetic Ink Character Recognition(MICR)?
What is OCR(Optical Character Recognition)?
OCR stands for optical character recognition, a wonderful and marvelous technology. It enables you to convert previously printed text material into information your computer can understand, without having to retype it. Have you ever had a story or an article or a magazine clipping that you wanted to have in your computer, but the thought of retyping the entire thing was overwhelming? Or just boring? That’s what OCR is for. [Read more…] about What is OCR(Optical Character Recognition)?
Peripheral Device – What is Peripheral Device?
A computer device, such as a CD-ROM drive or printer, which is not part of the essential computer, i.e., the memory and microprocessor. Peripheral devices can be external — such as a mouse, keyboard, printer, monitor, external Zip drive or scanner — or internal, such as a CD-ROM drive, CD-R drive or internal modem. Internal peripheral devices are often referred to as integrated peripherals. Linkage between the CPU and the users is provided by Peripheral devices.
What are Impact and Non-Impact Printers?
A printer is an output device that prints characters, symbols, and perhaps graphics on paper. The printed output is generally referred to as hard copy because it is in relatively permanent form. Soft copy refers to temporary images such as those displayed on a monitor. Printers are categorized according to whether or not the image produced is formed by physical contact of the print mechanism with the paper. Impact printers have contact; non impact printers do not. [Read more…] about What are Impact and Non-Impact Printers?
Line Printer – What is Line Printer? Type of Line Printer
Line Printers :- Line Printer can Print One Line at a Time. The line printer is a form of high speed impact printer. They can Print 300 to 3000 Lines per Minute. So that they are very fast. Large Computer system typically use Line Printer. The Line Printers are of two Types. [Read more…] about Line Printer – What is Line Printer? Type of Line Printer
what is a hard drive? – definition
Hard Disk Drive Definition: It is also called HDD,”disk drive,” (hard drive) or hard disk is a non-volatile. The hard disk drive is the primary storage unit of the computer. This is where your data, programs and the Windows system that is used to make your computer are physically saved in a digital form (string composed of 0s and 1s). There hard disk capacity is expressed in gigabytes (GB). More hard disk drive will have a large capacity, the more you can install programs or store documents in your computer. [Read more…] about what is a hard drive? – definition
Storage Devices
As we know that the Main Memory Stores the data in a Temporary Manner means all the data will be loss when the Power switched off. And all the data will be loss when the power goes switched off. [Read more…] about Storage Devices
Distinguish between DDRAM and FPMDRAM.
DDRAM: – Short for Double Data Rate-Synchronous DRAM, a type of SDRAM that supports data transfers on both edges of each clock cycle (the rising and falling edges), effectively doubling the memory chip’s data throughput. DDR-SDRAM also consumes less power, which makes it well suited to notebook computers. DDR-SDRAM is also called SDRAM II And DDRAM. [Read more…] about Distinguish between DDRAM and FPMDRAM.
Types of integrity
There are two types of relational integrity rules
Entity Integrity: – No attribute participating in the primary key of a base relation allowed containing any nulls. Primary key performs the unique identification function in a relational model. Thus a null primary key value within a base relation would be like saying that there was some entity that had no known identity. An entity that cannot be identified is a contradiction in terms, hence the name entity integrity. [Read more…] about Types of integrity
What are the Personal, Social and Ethical Issues in IT ?
Personal Issues : An increase in work load and / or responsibilities can trigger job stress. Many employees feel information anxiety because other people are better than they in using computers, because they are slow in learning new technology and because of the need to continuously learn new things. [Read more…] about What are the Personal, Social and Ethical Issues in IT ?
What are the types of Information Systems?
Transaction Processing System (TPS) : Organizations perform routine, repetitive tasks. For example employees are paid at regular intervals, customers place purchase orders and are billed and expenses are monitored and compared to budgets. [Read more…] about What are the types of Information Systems?
What is the Difference between Data and Information ?
The words Data and Information may look similar and many people use these words very frequently, But both have lots of differences between them. [Read more…] about What is the Difference between Data and Information ?
What is Information Technology? Explain Difference Between Data and Information
Information technology is the study, design, development, implementation, support or management of computer based information systems, particularly software applications and computer hardware. It is the capability to electronically input, process, store, output, transmit and receive data and information, including text, graphics, sound and video as well as the ability to control machines of all kinds electronically. [Read more…] about What is Information Technology? Explain Difference Between Data and Information
What is semiconductor? definition and meaning
Definition: Semiconductors are widely used in electronics to make components such as diodes, transistors, thrusts, integrated circuits as well as semiconductor lasers. A ‘semiconductor’ is a material whose properties lie between conductors and insulators. The resistance in semiconductor decreases as there is an increase in temperature because as the temperature is increased, the electrons present in the valence band get excited and jumps into the conduction band, which increases the conductance and hence, resistance decreases. [Read more…] about What is semiconductor? definition and meaning
CPU Cache – What is Processor Cache ?
The Processor Cache is memory that store data (code, commands etc.). it is used with the processor to facilitate the access of data from the system’s main memory or RAM. Processor Cache reduces the average time to access memory. The processor cache typically consists of two levels, which are the L1 cache and the L2 cache. [Read more…] about CPU Cache – What is Processor Cache ?
Evolution of Digital Computers
The successful general purpose mechanical computers were developed. In 1930, mechanical calculations were built for automatic addition, subtraction, multiplication & division. A calculator is not a programmable device. The different eras of the Evolution of Digital Computers are listed below: [Read more…] about Evolution of Digital Computers
What is CPU | CPU Definition | CPU Meaning
What is CPU: It’s meaning is Central Processing Unit. Sometimes referred to simply as the central processor or Nerve Centre or heart, but more commonly called processor, the CPU is where most calculations take place. The CPU is the brains of the computer. [Read more…] about What is CPU | CPU Definition | CPU Meaning
Uses of Computer
Education : Getting the right kind of information is a major challenge as is getting information to make sense. College students spend an average of 5-6 hours a week on the internet.Research shows that computers can significantly enhance performance in learning. Students exposed to the internet say they think the web has helped them improve the quality of their academic research and of their written work. One revolution in education is the advent of distance learning. This offers a variety of internet and video-based online courses. [Read more…] about Uses of Computer
Characteristic of a Computer
Basic characteristics about computer are:
1. Speed: – As you know computer can work very fast. It takes only few seconds for calculations that we take hours to complete. You will be surprised to know that computer can perform millions (1,000,000) of instructions and even more per second. [Read more…] about Characteristic of a Computer
Von-Neumann Architectures
History of Computer | Generation of Computer
Each generation of computer is characterized by a major technological development that fundamentally changed the way computers operate, resulting in increasingly smaller, cheaper, more powerful and more efficient and reliable devices. [Read more…] about History of Computer | Generation of Computer
Classification of Computers | Type of Computer
Computers differ based on their data processing abilities. They are classified according to purpose, data handling and functionality. [Read more…] about Classification of Computers | Type of Computer
Block Diagram of Computer and Explain its Various Components
A computer can process data, pictures, sound and graphics. They can solve highly complicated problems quickly and accurately. A computer as shown in Fig. performs basically five major computer operations or functions irrespective of their size and make. These are [Read more…] about Block Diagram of Computer and Explain its Various Components