Memory Card And Its Types.

Q42. What is memory card? Discuss briefly its types.

Ans. Memory card also called a flash memory card or a storage card is a small storage medium used to store data such as text, pictures, audio and video for use on  small, portable or remote computing devices.
There are many types of memory cards:
1. Smart media cards: Smart media cards Read More …

Networking Port.

Q40. What is networking port? Name some well known ports with their port number.
Ans. A Network port is an address( 16 bit address) within a computer, usually associated with a particular application protocol.

Some well known ports for some common Internet protocols are:
Port               Protocols
21       –          File Transfer Protocol
23       –          Telnet Protocol
25       –          Simple Mail Transfer Protocol
80      –           Hypertext Transfer Protocol.

Difference Between Serial And Parallel Ports.

Q39. What is the difference between serial and parallel ports?


Serial Port: The serial port transfers data serially a bit at a time. As a result, the serial port needs only wire to transmit 8 bits. The disadvantage is that it take 8 times longer to transmit a byte. Serial ports come in the form of 9 pin or 25 pin male connectors. They are typically used to connect devices like mouse and modem.

Parallel Ports: Parallel Ports can receive and send a byte (8-bit) at a time.  Unlike the serial port, these 8 bits are transmitted parallel to each other. Parallel ports come in the form of 25-pin female connector. Parallel ports are popularly used to connect printer, scanner, CD writer, zip drive, external hard disc drive, tape backup drive, etc.

Why USB Ports Are Popular.

Q38. Why do you think USB ports are popular these days?

Ans. USB ports are getting popular these days because USB has been designed to spare the users botheration 8-pin, 25-pin, male, female connectors. It gives you a single, standardized, easy to use way to connect a variety of devices to a computer. These devices include printer, scanner, mice joystick, digital camera, web cameras, speakers, telephones, zip drive, network connections, scientific data acquisition devices etc.

The Role And Purpose Of Data And Address Bus.

Q37. Explain the role and purpose of data and address bus.


 Data Bus: Data bus carries data, in binary form, between the processor and external units, such as memory. Its typical size is 8 or 16 bits. The data bus consists of 8 wires, i.e., 256 combinations of binary digits. The data bus is bidirectional it can carry information in both directions CPU to memory and vice versa.

Address Bus: The address Read More …

How Control Bus Is Different From Other Buses.

Q36. What is control bus? How is it different from other buses?

Ans. Control bus consists of various lines which have specific functions for coordinating and controlling microprocessor operations. This tells memory that we reading from a location, specified on the address bus, or writing to a location specified.

Read More …

Difference Between Inkjet, Dot Matrix, Laser Printer.

Q32. Write brief notes on each of the following types of printer. Make clear the difference between them in terms of speed, cost and method of operation and suggest suitable applications.

  1. Inkjet Printer,
  2. Dot Matrix Printer,
  3. Laser Printer.



  1. Inkjet Printer: An inkjet printer is any printer that fires extremely small deposit of ink onto the paper to create impression text on image.Inkjet printer can print 6 pages a minute.

    Cost for basic inkjet printer is approximately USD 100-150

    More commonly used for homes as the unit is smaller and ink is cheaper.

  2. Dot Matrix Printer: Read More …

Types Of Output Devices.

Q31. Name three types of output devices. In each case briefly describe the purpose of the device and how it operates.
Ans. Output devices are:

  1. Monitor: Monitor or screen is the most common form of output from a computer. It displays information in a similar way to that shown on a television screen. The picture on a monitor is made up of thousands of tiny colored dots called pixel. The quality and detail of a picture on a monitor depends on the number of pixels that it can display. The denser are the pixels, the greater the clarity of the screen image.
  2. Printers: Printer is an output device used for Read More …