Found 1261 Articles for Computers

Inside a computer, there is an Arithmetic Logic Unit (ALU), which is capable of performing logical operations (e.g. AND, OR, Ex-OR, Invert etc.) in addition to the arithmetic operations (e.g. Addition, Subtraction etc.). The control unit supplies the data required by the ALU from memory, or from input devices, and directs the ALU to perform a specific operation based on the instruction fetched from the memory. ALU is the “calculator” portion of the computer.An arithmetic logic unit(ALU) is a major component of the central processing unit of the a computer system. It does all processes related to arithmetic and logic ... Read More

Whenever a program executes inside a computer then at first the program has to be loaded on to the computer’s primary memory. And also when a does not execute then also the program must remain loaded in computers secondary memory. This memory unit works as an extra block. In a program in memory, the entire set of performed operations is written using the keyboard as a sequence of instructions. This collection of instruction is called a program. Also, the data on which the program is to operate is entered with the help of the keyboard and can be stored in memory. ... Read More

Output devices are used for displaying or recording the results computed by the computer. Most common output devices are the CRT display,  printer, and plotter.Following are some of the important output devices used in a computer.MonitorsGraphics PlotterPrinterMonitorsMonitors, commonly called a Visual Display Unit (VDU), are the main output device of a computer. It forms images from tiny dots, called pixels that are arranged in a rectangular form. The sharpness of the image depends upon the number of pixels.There are two kinds of viewing screen used for monitors.Cathode-Ray Tube (CRT)Flat-Panel DisplayCathode-Ray Tube (CRT) MonitorThe CRT display is made up of small picture elements ... Read More

The input devices are used for supplying program and data to the memory. In other words, the computer system reads the program and the data from the input devices. Most common input devices are the keyboard and mouse.Following are some of the important input devices which are used in a computer −KeyboardMouseJoy StickLight penTrack BallScannerGraphic TabletMicrophoneMagnetic Ink Card Reader(MICR)Optical Character Reader(OCR)Bar Code ReaderOptical Mark Reader(OMR)KeyboardThe keyboard is the most common and very popular input device which helps to input data to the computer. The layout of the keyboard is like that of the traditional typewriter, although there are some additional ... Read More

Computer scan is broadly classified by their speed and computing power.Sr.No.TypeSpecifications1PC (Personal Computer) or Micro-ComputersIt is a single user computer system having a moderately powerful microprocessor. It is termed as a computer that is equipped microprocessor as its CPU.2WorkstationIt is also a single user computer system, similar to the personal computer, however, has a more powerful microprocessor.3Mini-ComputerIt is a multi-user computer system, capable of supporting hundreds of users simultaneously.4Main FrameIt is a multi-user computer system, capable of supporting hundreds of users simultaneously. Software technology is different from minicomputer.5Super-ComputerIt is an extremely fast computer, which can execute hundreds of millions of ... Read More

Although it is based on C++, Java is more of a “pure” object-oriented language. In Java, everything extends into an Object class. It means the coding is mostly wrapped in Java objects. The Java language assumes that you want to do only object-oriented programming.You cannot code anything in Java without declaring classes and objects.For example, if you have to say a small sentence "Hello World", it should be declared as a class:class HelloWorldApp {    public static void main(String[] args) {       System.out.println("Hello World!"); // Display the string.    } }Because more than 90% of coding involves objects, ... Read More

Did you notice small bumps on the F and J keys on a computer keyboard?? Wonder why they are a part of keyboard design.Actually, the small bumps or ridges found on the F and J keys on a computer keyboard are to help the users to correctly position their left and right hands without having to look at the keyboard. The middle row is called the home row key position. Once you place your left and right index fingers on the F and J keys, accessing the remaining keyboard becomes easy.

UNIX copyrighted Operating system which is used by IBM AIX, Sun Solaris and HP-UX etc., Most of the UNIX systems are commercial in nature.Linux is considered as UNIX clone. But the traditional companies won't accept "Unix-like" but want the Unix trademark. Linux Is Just a Kernel and not the complete Operating system.When it comes to administration, Linux is considered as most user-friendly operating systems. Unix and Linux use a different set of tools for back up of data. However, they both share some common tools such as tar, dump/restore, and cpio etc.

Cyber Security jobs are growing three times faster than information technology jobs. And there are very few candidates available with the required skills. Some of the career prospects in Cyber Security include information assurance, security analyst, penetration tester, malware analyst/reverse engineering and Intel.There are almost 200 institutes in major cities of India which give training in ethical hacking. Out of them, a maximum number of institutes are available in the capital, Delhi. Cybersecurity coaching is an expensive affair.Indian Cyber Security Solutions is an ISO certified institute, which has branches in major cities of India and is regarded as the best ... Read More

There are many openings for CSE and IT engineering graduates in the Indian Government sector. Here is the list of Major IT Organizations in Government of India which have openings every year for fresh engineering graduates.Centre for Development of Advanced Computing (CDAC), ONGC(Oil and Natural Gas Corporation)GAIL(Gas Authority India Ltd )National Informatics Centre (NIC)HAL (Hindustan Aeronautics LimitedEducation and Research Network (ERNET India)Software Technology Parks of India (STPI)SAIL(Steel Authority of India)DRDO (Defence Research and Development Organization)MECON limitedBARC - Bhabha Atomic Research Centre ( BARC )MECL - Mineral Exploration Corporation LimitedECIL - Electronics Corporation of India LimitedFCI - Food Corporation of IndiaCDAC ... Read More