1. Fill in the blanks:
(a) Keyword is an example of common input device.
(b) QWERTY is the most common layout of the keyword.
(c) Barcode is a machine-readable code in the form of parallel lines.
(d) Touch pas is used in portable computer.
(e) The mouse is a small hand-held pointing device that is used to select commands, text and create free hand images.
(f) Graphic digitizer is used for converting images, maps and drawing into digital form for computer.
(g) Plotter is a pen-based hardcopy output device that is attached to a computer to produce vector graphics.
(h) The electronic version of an output is known as softcopy output.
(i) A projector is an output device that takes images generated by a computer and reproduce them by projection onto a screen.
2. True or False
(a) Physical form of output is known as output. False
(b) A track ball requires more space than a mouse for operation. False
(c) An optical mouse uses light beam instead of a rotating ball. True
(d) Digital camera is an input device that is used input picture. True
(e) LCD monitors are flat panel monitors which create images with a special kind of liquid crystal. True
(f) Scanners use a light beam to scan the input data. True
(g) OMR is the process of recognizing a pre-specified type of mark made by pencil or pen on the paper. True
(h) Speakers are connected to the CPU and sounds are produced with the help of a soundcard. True
3. Tick the best answer
(a) An example of hardcopy output device is
(i) Printer (ii) Monitor (iii) Mouse (iv) Keyboard
(b) It is a device which makes easy to give instructions
(i) Keyboard (ii) Mouse (iii) Touch Pad (iv) Printer
(c) An example of softcopy output device is
(i) Printer (ii) Monitor (iii) Hard Disk (iv) Mouse
(d) The full form of USB is
Ans: Uniform Resource Locator
(e) An example of impact printer is
Ans: Dot matrix printer
4. Write full forms:
CPU= Central Processing Unit
PC= Personal Computer
USB= Universal Serial Bus
MDA= Monochrome Display Adapter
CGA= Colour Graphic Adapter
VGA= Video Graphic Array
EGA=Enhanced Graphic Adapter
SVGA=Super Video Graphic Array
VDT=Video Display Terminal
CRT= Cathode Ray Tube
BCR=Bar Code Reader
DPI= Dot Per Inch
ASCII= Americal Standard Code for Information Interchange
CAD= Computer Aided Design
GUI= Graphical User Interface
IBM= Internation Business Machine
CPS= Click Per Second
5. Write short notes on:
(a) Mouse :
Title: The Mouse
Introduction:
- The mouse is a pointing device used to interact with a computer.
- It is an essential peripheral that facilitates navigation and selection on a computer screen.
Physical Characteristics:
1. Shape and Size:
- Typically small, handheld device.
- Can vary in shape, from traditional to ergonomic designs.
2. Buttons:
- Primary buttons (usually left and right).
- Scroll wheel (if present) for easy navigation.
- Additional buttons for specific functions in advanced mice.
3. Connectivity:
- Wired mice connect via USB or PS/2 ports.
- Wireless mice use Bluetooth or radio frequency technology.
Functionality:
1. Pointer Movement:
- Movement of the mouse on a surface translates to cursor movement on the screen.
2. Clicking:
- Left-click: Primary action for selection and interaction.
- Right-click: Contextual menu and secondary actions.
- Double-click: Rapidly clicking twice for certain actions.
3. Scrolling:
- Scroll wheel for vertical or horizontal navigation in documents or web pages.
4. Drag and Drop:
- Holding down a mouse button while moving it drags items on the screen.
- Releasing the button drops the item at the desired location.
Uses:
1. Graphic Design:
- Precision in drawing and editing.
2. Gaming:
- Essential for navigation and interaction in many computer games.
3. General Computer Use:
- Browsing the internet, file management, and everyday tasks.
Maintenance:
1. Surface:
- Mice work best on flat and clean surfaces.
- Regularly clean the mouse's sensor for optimal performance.
2. Battery (for wireless mice):
- Replace or recharge batteries as needed.
Conclusion:
- The mouse is a fundamental input device, providing users with a convenient and efficient means of interacting with computers.
- Regular maintenance ensures longevity and optimal performance.
(b) Touch Pad
Title: The Touchpad
Introduction:
- A touchpad is a common input device found on laptops and some computer peripherals.
- It serves as an alternative to a traditional mouse, providing a compact and integrated solution.
Physical Characteristics:
1. Location:
- Typically located below the keyboard on laptops.
- Found on some external keyboards and standalone devices.
2. Surface:
- Smooth, touch-sensitive surface for gesture-based input.
Functionality:
1. Pointer Movement:
- Sliding a finger across the touchpad moves the on-screen cursor.
2. Tapping:
- Single tap for left-click function.
- Double tap for double-click action.
3. Gestures:
- Multi-touch gestures enable various functions.
- Examples include pinch-to-zoom, two-finger scrolling, and three-finger swiping.
4. Clicking:
- Integrated buttons beneath the touchpad or a designated area for left and right-click functions.
Uses:
1. Laptops:
- Primary pointing device on most laptops, eliminating the need for an external mouse.
2. Compact Keyboards:
- Some compact keyboards incorporate a touchpad for space efficiency.
3. Accessibility:
- Useful for individuals with mobility challenges who may find traditional mice challenging to use.
Maintenance:
1. Cleanliness:
- Keep the touchpad surface clean to ensure accurate tracking.
- Use a soft, lint-free cloth for cleaning.
2. Sensitivity Settings:
- Adjust touchpad sensitivity through system settings to suit personal preferences.
Conclusion:
- The touchpad is a convenient and integrated input device, commonly found on laptops and some computer peripherals.
- Its compact design and gesture-based controls provide a user-friendly interface for navigating and interacting with digital content.
(c) Scanner
Title: Scanner
Introduction:
- A scanner is a device that converts physical documents, images, or objects into digital formats, allowing them to be stored, manipulated, and shared electronically.
Types of Scanners:
1. Flatbed Scanners:
- Commonly found in homes and offices.
- Documents or images are placed on a glass surface for scanning.
2. Sheet-fed Scanners:
- Automatically feed and scan multiple documents in succession.
- Ideal for handling batches of papers quickly.
3. Handheld Scanners:
- Portable devices used for scanning in various environments.
- Require manual movement over the document or object.
4. Drum Scanners:
- Less common, used for high-resolution scanning of images and artwork.
- Employ a rotating drum to capture details.
Functionality:
1. Optical Character Recognition (OCR):
- Converts scanned text into editable and searchable text.
2. Color Depth and Resolution:
- Higher resolution and color depth provide clearer and more detailed scans.
3. Connectivity:
- USB, Wi-Fi, or network connectivity for seamless integration with computers and networks.
Uses:
1. Document Scanning:
- Convert paper documents into digital files for easier storage and organization.
2. Image and Photo Scanning:
- Preserve printed photographs or artwork in digital format.
3. OCR for Text Recognition:
- Extract text from scanned documents for editing, searching, and sharing.
4. 3D Scanning (some advanced scanners):
- Capture three-dimensional objects for various applications, such as design and modeling.
Maintenance:
1. Cleaning:
- Regularly clean the scanner's glass surface to ensure clear and accurate scans.
- Follow manufacturer guidelines for cleaning.
2. Calibration:
- Some scanners may require periodic calibration for optimal performance.
Conclusion:
- Scanners play a crucial role in digitizing and archiving physical documents and images, making them an integral part of modern offices and households.
- Different types of scanners cater to various needs, from basic document scanning to high-resolution imaging and 3D scanning. Regular maintenance ensures consistent and reliable performance.
(d) Bar Code Reader
Title: Barcode Reader
Introduction:
- A barcode reader, or barcode scanner, is a device that reads and interprets barcode symbols, translating them into alphanumeric characters for data processing and tracking.
Types of Barcode Readers:
1. **Laser Scanners:**
- Use laser beams to read barcode information.
- Commonly found in retail environments and for general-purpose scanning.
2. **Imager Scanners:**
- Capture an image of the barcode and then decode it.
- Can read 1D and 2D barcodes, making them versatile.
3. **Pen-type Scanners:**
- Require swiping the pen-like device across the barcode.
- Less common today due to their limited efficiency.
4. **Camera-based Readers:**
- Utilize a camera to capture barcode images.
- Common in mobile devices for scanning QR codes and other 2D barcodes.
Functionality:
1. **Illumination:**
- Barcode readers often have built-in light sources to enhance barcode visibility for accurate scanning.
2. **Decoding Algorithms:**
- Sophisticated algorithms interpret the pattern of black and white bars to extract data.
3. **Connection Options:**
- Wired scanners connect via USB or other ports.
- Wireless scanners use Bluetooth or Wi-Fi for increased mobility.
Uses:
1. **Retail and Point of Sale (POS):**
- Efficiently scan product barcodes for quick and accurate transactions.
2. **Inventory Management:**
- Track and manage stock by scanning barcodes on items.
3. **Library Systems:**
- Barcode readers assist in cataloging and checking in/out library materials.
4. **Manufacturing and Logistics:**
- Used for tracking and managing the movement of goods throughout the supply chain.
5. **Healthcare:**
- Utilized in medical facilities for patient identification, medication tracking, and inventory management.
Maintenance:
1. **Regular Cleaning:**
- Clean the scanner window to ensure clear barcode readings.
- Follow manufacturer guidelines for cleaning procedures.
2. **Software Updates:**
- Keep firmware and software up to date for improved performance and compatibility.
Conclusion:
- Barcode readers play a crucial role in various industries for efficient data capture and management.
- Different types of barcode readers cater to specific needs, offering versatility in applications such as retail, logistics, and healthcare. Regular maintenance ensures reliable and accurate scanning.
(e) Joystick
Title: Joystick
Introduction:
- A joystick is an input device used primarily in gaming and aviation simulations to control the movement of on-screen objects.
Physical Characteristics:
1. **Stick:**
- Typically a vertical lever that can be moved in multiple directions.
- May have additional buttons on the base or along the stick.
2. **Base:**
- Contains mechanisms for sensing movement in various directions.
- Buttons and triggers for additional functions.
3. **Connection:**
- Connects to a computer or gaming console via USB, Bluetooth, or proprietary connectors.
Types of Joysticks:
1. **Analog Joysticks:**
- Offer fluid and precise control by sensing the degree of movement in all directions.
- Commonly used for flight simulations and 3D games.
2. **Digital Joysticks:**
- Provide discrete directional inputs (up, down, left, right) without sensing the degree of movement.
- Simple and often used in classic arcade-style games.
3. **Force Feedback Joysticks:**
- Incorporate motors to simulate resistance and vibrations, enhancing the gaming experience.
- Common in flight simulations to mimic the feel of a real aircraft.
Uses:
1. **Gaming:**
- Primary input device for flight simulators, racing games, and other genres requiring precise control.
2. **Flight Simulations:**
- Piloting aircraft or spacecraft in virtual environments.
3. **Arcade Games:**
- Classic arcade-style games that benefit from simple directional controls.
4. **Control Systems:**
- Used in industrial and military applications for controlling machinery and vehicles.
Maintenance:
1. **Cleanliness:**
- Keep the joystick free from dust and debris to maintain smooth movement.
- Use compressed air or a soft brush for cleaning.
2. **Check Buttons and Triggers:**
- Periodically test and ensure that all buttons and triggers are functioning correctly.
Conclusion:
- Joysticks provide a hands-on and immersive experience for gaming and simulation enthusiasts.
- Different types cater to various applications, offering both precision and simplicity in control. Regular maintenance enhances the longevity and performance of the joystick.
(f) MICR
Title: Magnetic Ink Character Recognition (MICR)
Introduction:
- Magnetic Ink Character Recognition (MICR) is a technology used for the recognition and processing of characters printed with magnetic ink.
Key Components:
1. **Magnetic Ink:**
- Special ink containing ferrous oxide that makes characters readable by magnetic scanners.
2. **MICR Line:**
- A line of characters printed in a specific font at the bottom of checks and other financial documents.
3. **MICR Reader/Scanner:**
- A device equipped with magnetic sensors to read and interpret characters printed in magnetic ink.
Features of MICR:
1. **Character Set:**
- The MICR character set includes numerals 0-9 and four special symbols: transit, on-us, amount, and dash.
2. **Placement:**
- MICR characters are printed in a specific location at the bottom of financial documents, ensuring uniformity for accurate reading.
3. **Security:**
- MICR is resistant to tampering and fraud, as characters are printed with magnetic ink that is difficult to replicate using standard printing methods.
Uses:
1. **Check Processing:**
- MICR is widely used in the banking industry for automated check processing.
- Enables quick and accurate extraction of information, such as account numbers and routing details.
2. **Financial Transactions:**
- MICR technology facilitates secure and efficient processing of various financial documents, including checks, deposit slips, and payment vouchers.
3. **Transaction Automation:**
- Automates the data entry process by quickly capturing and interpreting MICR-encoded information.
4. **Reducing Errors:**
- Minimizes the risk of errors associated with manual data entry, providing a reliable method for processing financial transactions.
Maintenance:
1. **Quality of Magnetic Ink:**
- Ensure that magnetic ink used for printing MICR characters meets industry standards.
2. **Cleanliness of MICR Readers:**
- Regularly clean MICR readers to prevent dust or debris from affecting the accuracy of character recognition.
Conclusion:
- MICR technology plays a crucial role in automating and securing financial transactions, particularly in the processing of checks and other related documents.
- The use of magnetic ink and specific character placement on documents, combined with MICR readers, enhances the efficiency and accuracy of financial transaction processing. Regular maintenance is essential to ensure optimal performance.
6. Answer the following questions in short:
(a) What is the purpose of using input device in computer?
Ans: The purpose of using input devices in a computer is to facilitate user interaction by providing a means to input data and commands into the system.
(b) Name any two pointing devices.
Ans: Two pointing devices are a mouse and a touchpad.
(c) What is printer?
Ans: A printer is a peripheral device that produces a hard copy or permanent text or graphics representation of digital data stored in a computer.
(d) Why do you use projector?
Ans: A projector is used to display digital content, such as presentations, images, or videos, onto a larger screen or surface for a group of people to view.
(e) In which computer touch pad is used?
Ans: A touchpad is used in laptops as a pointing device for cursor control and gesture-based input.
(f) What is scanner?
Ans: A scanner is a device that converts physical documents, images, or objects into digital formats, allowing them to be stored, manipulated, and shared electronically.
(g) Where do you see using bar code reader?
Ans: A barcode reader is commonly used in various settings, such as retail, inventory management, and libraries, for scanning and processing barcodes on items.
(h) What is joystick?
Ans: A joystick is an input device primarily used in gaming and aviation simulations to control the movement of on-screen objects, offering a hands-on and immersive experience.
7. Answer the following questions:
(a) What are input devices? Give two examples of it.
Ans: Input devices are peripherals that enable users to interact with a computer by providing data or commands. Two examples of input devices are keyboards and mouse.
(b) What is a mouse? How it makes works easier?
- A mouse is a pointing device used to control the movement of a cursor on a computer screen. It typically has buttons for clicking and a scroll wheel. It makes work easier by providing a more intuitive and precise means of interacting with graphical user interfaces, enabling users to navigate, select, and operate software more efficiently.
(c) What is a hardcopy output device? Give examples of it.
- A hardcopy output device produces a physical or tangible copy of digital information. Examples include printers, plotters, and photocopiers.
(d) Differentiate between mouse and trackball.
- A mouse is a handheld device moved on a surface to control the cursor, while a trackball is a stationary device with a rotating ball on top that is manipulated to achieve cursor movement. The key difference is in the method of control.
(e) What is meant by voice recognition system?
- A voice recognition system, also known as speech recognition, is a technology that converts spoken words into text or commands, allowing users to control devices or input data using their voice.
(f) What is a printer? Explain the different types of printers with examples.
- A printer is an output device that produces a hard copy of digital information. Types of printers include inkjet (e.g., Epson), laser (e.g., HP LaserJet), and dot matrix (e.g., Epson LX-350), each with distinct printing mechanisms.
(g) What is an output device? Differentiate between hardcopy output and softcopy output.
- An output device presents information from a computer. Hardcopy output is a physical copy (e.g., printed document), while softcopy output is displayed on a screen (e.g., monitor).
(h) Differentiate between impact and non-impact printers.
- Impact printers (e.g., dot matrix) use a mechanism to physically strike an inked ribbon, transferring characters to paper. Non-impact printers (e.g., inkjet, laser) form characters without direct contact.
(i) What is the use of a plotter?
- A plotter is used for producing high-quality, large-scale prints of designs, maps, and architectural drawings with precise detail, making it suitable for tasks like engineering and design.
(j) What is a monitor? Why is it necessary in the computer system?
- A monitor is a display device that visually presents information generated by the computer. It is necessary for users to interact with the computer, providing a visual output of applications, documents, and multimedia content.
The End