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What is a DVD (Digital Versatile Disk) ? Advantages or Disadvantages of DVD What is a DVD (Digital Versatile Disk) ? DVD (Digital Versatile Disk) is optical disk storage. Basically it is used for storing large amount of data including movies with high video & sound quality. Work on the same principle of CDROM. Data…
What is CD-ROM ? Advantages or Disadvantages of CD-ROM CD-ROM (Compact Disk – Read Only Memory) is a non-erasable backing store which can hold large amounts of data. It’s a shiny silver colour metal disk of 5 ¼ inch and the storage capacity about 650megabytes. Large volume production is achieved by automated processes similar to…
What is a Hard Disk ? Hard disks are most popular secondary storage device. It supports the direct access of the data. It’s a thin magnetic plate which is made of metal n both side coated with magnetic material. The disk is divided in many tracks & the data is store in both side of…
What is Floppy Disk ? Advantages or Disadvantages of Floppy Disk What is Floppy Disk ? Floppy disks were introduced by IBM in 1972. A floppy disk is a round, flat piece of flexible plastic which is coated with magnetic oxide. It is encased in square plastic cover that gives protection to the disk. They…
What is a Magnetic Disk ? Types of Magnetic Disks What is a Magnetic Disk ? Directly access storage device. It’s a thin circular plate that is made up with plastic material. Plate is coated both side with magnetic material such as iron oxide. Information is recorded on the tape in the form of tiny…
What is Magnetic Tape? advantages or Disadvantages of Magnetic Tape What is Magnetic Tape? Sequentially access storage device. Most popular storage medium for storage large data. Its plastic ribbon which is ½ or ¼ inch wide and 50 to 2400 feet long. It is coated with a magnetisable recording material. In a magnetic tape data…
What is a Graphics Card ? A graphics card is the component in your computer that handles generating the signals that are sent to the monitor or “graphics”. It is responsible for generating all the text and pictures that are displayed on your screen. The images you see on your monitor are made of tiny…
What is a USB Cable ? To Connecting a USB device to a computer is simple — you find the USB connector on the back of your machine and plug the USB connector into it. If it’s a new device, the operating system auto-detects it and asks for the driver disk. If the device has…
What is a Parallel Cable ? On many legacy peripherals, the parallel cable utilized both the 25 pin Sub-D connector and the 36 pin Centronics connector. This was a common printer interface and is still in service in great numbers. With the advent of “intelligent” laser and ink jet printers, the IEEE-1284 bi- directional printer…
What is a Serial Cable ? Serial Cables are typically used for RS-232 communication. A serial cable is a cable that can be used to transfer information between two devices using serial communication. The form of connectors depends on the particular serial port used. The maximum working length of a cable varies depending on the…