How We Communicate with Computers: Input and Output Devices
Input and output devices are essential for interacting with a computer system. Input devices send data to the computer, allowing users to control or communicate with it.
Common examples include the keyboard, mouse, scanner, joystick, microphone, light pen, and webcam.
On the other hand, output devices receive data from the computer and help it respond to users.
These include the monitor, printer, plotter, speakers, headphones, and projector.
Together, these devices make it possible for humans and computers to work together effectively.
Review Questions
- What is the primary function of an input device?
- A) To receive data from the CPU
- B) To send data or information to a central processing unit
- C) To display information on a screen
- D) To print documents
- Which of the following is described as the most common type of input device?
- A) Mouse
- B) Scanner
- C) Keyboard
- D) Webcam
- According to the source, how many keys does the keyboard have?
- A) 101
- B) 104
- C) 108
- D) 110
- Which action allows a user to enter data and instructions to the computer using a keyboard?
- A) Moving the mouse
- B) Pointing to displayed objects
- C) Recording voice
- D) Pressing the relevant keys
- Interaction with a computer using a mouse is known as what process?
- A) Scanning and transferring
- B) Recording and chatting
- C) Point and click
- D) Drawing continuous lines
- What moves in a corresponding direction on the computer’s monitor screen when a user moves the mouse?
- A) The cursor
- B) The pointer
- C) The image
- D) The text
- A scanner is an input device used for what purpose?
- A) To record voice
- B) To control video games
- C) To transfer images or text from books or paper into a computer
- D) To display data on a screen
- Which input device is often used to control video games and consists of a handle that pivots on a base?
- A) Light pen
- B) Joystick
- C) Microphone
- D) Webcam
- A microphone is used to record our voice and different sounds into a computer. It also helps us to do what through the internet?
- A) Play video games
- B) Print documents
- C) Project images
- D) Chat with our friends
- What does a light pen allow the user to do?
- A) Listen to music
- B) Print on paper
- C) Point to displayed objects and write or draw on the computer screen
- D) Transfer images from paper
- Which input device is connected to the computer and can capture photographs and videos, often used to live stream videos or perform video chats?
- A) Monitor
- B) Projector
- C) Webcam
- D) Speaker
- What is the primary function of an output device?
- A) To send data to the CPU
- B) To record sound
- C) To receive data or information from the central processing unit
- D) To control video games
- Which output device displays data from a computer onto a screen so the user can interact with the data?
- A) Printer
- B) Plotter
- C) Monitor
- D) Scanner
- A printer is used to print text or pictures on paper. What is the printed copy on a paper called?
- A) Soft copy
- B) Digital copy
- C) Hard copy
- D) Electronic copy
- Which output device is described as much like a printer but uses a pen, pencil, marker, or another writing tool to draw multiple continuous lines onto paper instead of toner?
- A) Monitor
- B) Plotter
- C) Speaker
- D) Projector
- Which output devices allow us to listen to music and hear sound effects stored in a computer?
- A) Keyboard and Mouse
- B) Scanner and Webcam
- C) Speakers and Headphones
- D) Printer and Plotter
- What is the function of headphones?
- A) To record sounds for others to hear
- B) To print quiet documents
- C) To project private images
- D) To listen to music as well as record sounds without disturbing others
- A projector is an output device that projects an image from the computer onto what?
- A) A piece of paper
- B) The computer screen
- C) A large surface such as a white screen
- D) A small monitor
- According to the source, using output devices, a computer can interact with whom?
- A) The central processing unit
- B) Other computers
- C) The internet
- D) The human
- Which of the following is listed as a type of key found on the keyboard in the source?
- A) Symbol keys
- B) Control keys
- C) Arrow keys
- D) Editing keys
- What keys on the keyboard are used to move the cursor or pointer around on the screen?
- A) Function keys
- B) Arrow keys
- C) Editing keys
- D) Numeric keypad
- Which keys are used to perform special tasks like printing and saving a document?
- A) Control keys
- B) Function keys
- C) Alphabet keys
- D) Arrow keys
- What keys are used to perform special operations such as deleting, inserting, or replacing text?
- A) Editing keys
- B) Function keys
- C) Numeric keys
- D) Arrow keys
- What is the function of the numeric keypad on the keyboard?
- A) To move the mouse pointer
- B) To enter letters and symbols
- C) To type numbers quickly
- D) To control sound output
- What device is described as detecting movements and sending corresponding signals to the computer?
- A) Keyboard
- B) Joystick
- C) Mouse
- D) Microphone
- The movement of the pointer on the screen is controlled by which device?
- A) Keyboard
- B) Monitor
- C) Mouse
- D) Speaker
- Which input device is essential for online chatting and recording audio into the computer?
- A) Joystick
- B) Webcam
- C) Microphone
- D) Light pen
- Which device can be used to select and draw directly on the screen of a computer?
- A) Scanner
- B) Mouse
- C) Light pen
- D) Keyboard
- Which device is responsible for showing images and data from the computer in visual form?
- A) Printer
- B) Monitor
- C) Microphone
- D) Scanner
- What is the purpose of using a projector as an output device?
- A) To scan documents
- B) To show printed text
- C) To display computer data to a larger audience
- D) To print photographs
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