• HARDWARE CONCEPTS,  INFORMATICS PRACTICES CLASS 11,  LONG QUES-H

    Working of output devices.

    Q2. What is the role of an output unit? Discuss various types of output devices along with their working mechanism. Ans. Once data has been input into a computer and processed, it is of little use unless it can be retrieved quickly and easily from the system. To allow this the computer must be connected to an output device. The output devices produce output of the machine in human understandably form. Types of output devices along with their working mechanism are: Monitors: Monitors or “screen” is the most common form of output from a computer. The picture is made up of thousands of tiny colored dots called pixels. The quality…

  • HARDWARE CONCEPTS,  INFORMATICS PRACTICES CLASS 11,  LONG QUES-H

    Working of input devices.

    Q1. Why is input unit needed in a computer? Discuss various types of input devices along with their working mechanism. Ans. The input unit is responsible for taking input and converting it into computer understandable form (the binary code). Since a computer operates on electricity i.e., either ON and OFF or high voltage or low voltage. That means a computer can understand two states ON/OFF or High/Low voltage or the binary language that uses just two signals: 1 for ON and 0 for OFF. Types of input devices along with their working mechanism are: The Keyboard: An important data entry device is the keyboard, which is a typewriter like device.…

  • HARDWARE CONCEPTS,  SHORT QUESTIONS-H

    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

  • HARDWARE CONCEPTS,  SHORT QUESTIONS-H

    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.

  • HARDWARE CONCEPTS,  SHORT QUESTIONS-H

    Difference Between Serial And Parallel Ports.

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

  • HARDWARE CONCEPTS,  SHORT QUESTIONS-H

    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.

  • HARDWARE CONCEPTS,  SHORT QUESTIONS-H

    The Role And Purpose Of Data And Address Bus.

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