Afaq NSS Computer 6 - Unit 1 Computer

Here is the solved Excercise of Unit No. 1 "Computer" Students can prepare them well for Exam after learning these questions. Please refer this page to other students so that they can get education while staying at home....

Afaq NSS Computer 6 - Unit 1 Computer

Key Points - Important Notes:

  • A computer is an electronic device or machine. It takes input, processes it, and shows the output.
  • Data is a collection of facts and figures that include words, numbers, symbols sounds, etc.
  • A computer is used at home to listen to the recitation of the Quran, watch play, take online classes, do online business, etc.
  • Software is a set of instructions that runs and controls hardware.
  • Hardware is the physical components or parts such as the keyboards, mouse, monitor, systems units, etc.
  • The computer components are classified as input devices, system units, storage devices, and output devices.
  • Input Devices are used to enter data into a computer these devices are the keyboard, mouse, scanner, microphone, digital camera, etc.
  • The system Unit consists of a casing and many internal components like motherboard, Central |process Unit (CPU), Storage devices, expansion cards power supply, etc.
  • A processor controls the working of all the hardware and software.
  • The motherboard connects the components and peripheral devices and allows all the parts of a computer to receive power and communicate with one another such as processor, memory, etc.
  • Computer memory is used to store and retrieve data.
  • Computer storage devices are used to store data in a computer such as hard drive, USB, CD, DVD, and Floppy Disk.
  • Output Devices are used to display the output of the processed data. These devices are monitors, printers, and speakers.
  • Communication devices are used to transmit data and communicate with other computers or devices, e.g. modems, interface cards, and Wi-Fi.
  • A modem modulates or converts digital signals generated by a computer to analog signals for transmission over the telephone network. 
  • A computer has four basic operations which include input, process, output, and storage.
Question 1. Match Column A with Column B
 
Question 2. Choose the correct option.
  • A computer is a/an _ _ _ _ _ _ _  device.
    a) auto          b) electrical          c) electronic          d) mechanical

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Question 3. Describe the following.
  1. Computer.
    computer is an electronic device or machine. It takes input, processes it, and shows the output.

  2. Keyboard
    A keyboard is an input device that is used to enter data into a computer.

  3. Hardware
    Hardware is the physical components or parts such as the keyboards, mouse, monitor, systems units, etc.

  4. Software
    Software is a set of instructions that runs and controls hardware.

  5. Processor
    processor controls the working of all the hardware and software.

  6. Motherboard:
    The motherboard connects the components and peripheral devices and allows all the parts of a computer to receive power and communicate with one another such as processor, memory, etc.

  7. Hard Drive
    Hard Disk or Hard Drive is a permanent storage device that stores data in a large amount. it is lugged in the system unit.

  8. Modem
    modem modulates or converts digital signals generated by a computer to analog signals for transmission over the telephone network. 

  9. Monitor
    A computer monitor is an output device that displays information in a pictorial form.

  10. Printer
    A printer is an output device that prints documents on a perper It takes data from a computer and generate a hard copy of it.
Question 4. Answer the following questions.
  1. Differentiate between data and information.
    Data: Data is a collection of facts and figures that include words, symbols, sounds, etc. Data has little meaning without context or analysis to explain what type of data is it.
    Information: After processing or arrangement, the data is converted into something more meaningful. Data is processed into useful forms of information. 

  2. Compare Read-Only-Memory (ROM) and Random Access Memory (RAM).
    Ans: Primary Memory consists of Read-Only Memory (ROM) and Random-Access Memory (RAM)
    Read-Only Memory (ROM) stores instructions permanently which are only readable. It contains instructions for the booting of the computer and input/output tasks.
    Random-Access Memory (RAM) keeps data only while a computer is working. It retains a copy of software applications and data that enables a user to access them quickly.




  3. What is the difference between hardware and software?
    Ans: Hardware is the physical component or part of a computer, such as the keyboards, mouse, monitor, systems units, etc.
    Software is a set of instructions/programs that run to solve problems and control hardware.

  4. What are the basic operations of a computer system?
    Ans: A computer has four basic operations which include input, process, storage and output. A computer takes input through input devices like the keyboard or mouse etc. The processed data is stored in primary or secondary storage. and shows the results on an output device. 



  5. What are the main components of a computer?
  6. What are the input devices? Explain any two.
  7. What are the output devices? Explain any two.
  8. What is the function of the motherboard on a computer?

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