Data Handling and Application Methods

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Questions and Answers

What is the expected lifespan of data stored on DVD-RAM?

100 years

10 years

50 years

30 years (correct)

What is one advantage of using a webcam for communication?

It lets users see each other while talking. (correct)

It allows for voice commands.

It requires no internet connection.

It can only record low-quality photos.

Which format was created to succeed the DVD but faced competition from Blu-ray?

Digital Versatile Disc

CD-R

DVD-RAM

HD DVD (correct)

What capacity can a dual-layer Blu-ray disc store?

50 GB Signup and view all the answers

Which of the following is a disadvantage of using webcams?

They require extensive storage for photos and videos. Signup and view all the answers

Which of the following is NOT a typical use of Flash memory?

Storing HD movies Signup and view all the answers

Which feature identifies OMR technology?

It can interpret marks made in pencil on paper. Signup and view all the answers

Why are flash pen devices preferred for transferring data?

They are lightweight and easily portable Signup and view all the answers

What is a primary function of a microphone?

To record sound and facilitate voice communication. Signup and view all the answers

What type of memory card can store up to 32 GB?

Secure Digital Signup and view all the answers

What is a requirement for OMR forms to work accurately?

The marks must be clearly defined. Signup and view all the answers

What is a characteristic of magnetic tape storage?

Large surface area for storing information Signup and view all the answers

Which device serves as both an input and output interface?

Touch screen Signup and view all the answers

What is a common usage of memory cards?

In digital cameras and mobile phones Signup and view all the answers

What is a potential issue with the use of high-quality video files?

They enhance bandwidth usage and slow down networks. Signup and view all the answers

Why might OMR printing costs be higher?

It requires precision in printing for accuracy. Signup and view all the answers

What is the primary advantage of using a keyboard as an input device?

They are almost always available and commonly known. Signup and view all the answers

Which input device detects movement using light rather than a mechanical ball?

Optical mouse Signup and view all the answers

What type of applications does 'turtle graphics' belong to?

Control applications Signup and view all the answers

Which input device offers a unique method of user control by allowing thumb movement?

Tracker ball Signup and view all the answers

What is one of the disadvantages of using a keyboard?

Users need to know the layout and be able to touch-type. Signup and view all the answers

Which application type includes the use of spreadsheets for managing finances?

Modelling applications Signup and view all the answers

What is the primary function of a graphics tablet?

Producing drawings using a stylus Signup and view all the answers

What differentiates a joystick from a standard mouse?

Joysticks provide control through lever movement. Signup and view all the answers

What is a major drawback of using magnetic tape storage for data access?

Accessing data in the middle of the tape is slow. Signup and view all the answers

Which of the following is NOT an advantage of Local Area Networks (LANs)?

Facilitates rapid data corruption. Signup and view all the answers

In a client/server network, which computer typically has more processing power?

The server. Signup and view all the answers

Which of the following describes a disadvantage of LANs?

Server setup and cabling costs can be high. Signup and view all the answers

What function do servers perform in a client/server network?

They manage services like email, printing, and security. Signup and view all the answers

Which of the following is a common risk associated with Local Area Networks?

Virus spread among connected computers. Signup and view all the answers

What is one of the primary uses of magnetic tape?

Data backup purposes. Signup and view all the answers

Why might users prefer a LAN for their computing needs?

They can work collaboratively on shared documents. Signup and view all the answers

What is a terminal in the context of network computing?

A computer that connects to a network. Signup and view all the answers

Which statement accurately describes a peer-to-peer network?

Each computer can communicate directly with every other computer. Signup and view all the answers

What is necessary for a computer to connect to a cabled LAN?

Network interface card (NIC). Signup and view all the answers

What key components enable a wireless LAN (WLAN) connection?

Wireless access points, routers, and wireless NICs. Signup and view all the answers

What is the main purpose of Bluetooth technology?

To enable devices to share and synchronize information. Signup and view all the answers

What characterizes a wide area network (WAN)?

Connects networks over large distances like cities or countries. Signup and view all the answers

What is the purpose of an IP address?

To uniquely identify each computer on the Internet. Signup and view all the answers

What is the maximum data transfer rate for Bluetooth technology?

720 kbps. Signup and view all the answers

Study Notes

Data Handling Applications

Data handling applications include: surveys, address lists, tuck shop records, clubs and society records, school reports, and school libraries.

Measurement Applications

Measurement applications include: scientific experiments, electronic timing, and environmental monitoring.

Control Applications

Control applications include: turtle graphics, control of lights, buzzers, and motors, automatic washing machines, automatic cookers, central heating controllers, burglar alarms, video recorders/players, microwave ovens, and computer-controlled greenhouses.

Modeling Applications

Modeling applications include: 3D modeling, simulation (e.g., flight or driving), spreadsheets for personal finance, and spreadsheets for tuck shop finances.

Input Devices

Keyboard: The most widely used input device; used to operate a PC; numeric keyboards only have keys for numbers and special characters; QWERTY keyboard may have a built-in numeric keyboard.
- Advantages: Widely available, many people know how to use them.
- Disadvantages: Requires knowledge of layout and touch-typing skills.
Mouse: Most widely used pointing device; some have a ball underneath, while optical mice use light to detect movement.
Tracker Ball: Similar to an upside-down mouse; ball is on the top, controlled with the thumb.
Joystick: Lever that provides similar control to a mouse; can be used separately or built into a gamepad.
Graphics Tablet: Flat rectangular pad with a stylus used to create drawings on the computer; different types of styluses include pucks and pen-shaped devices.
Webcam: Captures images and videos for communication over the Internet.
- Advantages: Records photos and videos in a digital format for easy backup and access on multiple devices; digital photos and videos can be sent via email and broadcast over the Internet for on-demand viewing.
- Disadvantages: Large file sizes for high-quality photos and videos can consume bandwidth and slow down networks.
Microphone: Used for recording sound, giving voice commands, and voice communication over the Internet.
Touch Screen: Two-way user interface, serving as both input and output; interacts with the computer by touching pictures or words on the screen; commonly used with tablets, PDAs, and smartphones.
Optical Mark Recognition (OMR): Interprets pencil marks on paper by recognizing the position of marks; computer then records the mark's position and analyzes it to determine data meaning.
- Advantages: Eliminates the need for typing, making input faster and less expensive; the person filling out the form is responsible for the accuracy of information.
- Disadvantages: OMR forms require accurate printing as mark positions affect accuracy, leading to higher printing costs; verification checks are unlikely, making input mistakes less likely to be detected.

Output Devices

Monitor: Displays visual information (text, images, videos) from the computer.
Printer: Produces hard copies of digital documents.
Loudspeaker: Output audio (sound) from the computer.

Storage Devices

Hard Disk Drive: Stores data permanently on a magnetic platter; can be internal or external.
Floppy Disk: Magnetic disk used for data storage, typically with limited storage capacity.
CD-ROM: Optical disk that stores data permanently; read-only.
CD-R: Optical disk that can be written to once and read multiple times.
CD-RW: Optical disk that can be rewritten multiple times.
DVD-ROM: Optical disk with higher storage capacity than CD-ROM; read-only.
DVD-R: Optical disk that can be written to once and read multiple times.
DVD-RW: Optical disk that can be rewritten multiple times.
DVD-RAM: Optical disk format for rewritable data; can be sealed inside a cartridge.
HD DVD: High-definition DVD format with sufficient capacity for storing HD video and movies; discontinued due to competition from Blu-ray.
Blu-ray: High-definition DVD format that replaced DVD; used for distributing HD material like movies; has higher storage capacity than DVD.
Flash Memory: Type of EPROM that can be rewritten quickly and easily; retains stored data without a power source.
- Examples: BIOS of a computer, memory cards for various devices like video games, cameras, and mobile phones; flash pen devices or memory sticks for data transfer between computers.
Magnetic Tape: Stores large amounts of data on a reel; provides serial access, making it slow for accessing specific data; mostly used for backing up data.

Networking

Local Area Networks (LANs): Collection of computers in a small geographical area (e.g., a room, building) that can share peripherals, information, and communication.
- Advantages: Sharing of software, data files, communication via instant messaging, streaming media; central access control, simplified maintenance.
- Disadvantages: High setup costs, risk of data corruption and virus spread.
Types of LANs:
- Client/Server: One or more computers designated as servers; client computers communicate with each other and externally through the server; servers have greater processing power, RAM, and storage than clients.
- Peer-to-Peer: Every computer can communicate directly with each other; data can be accessed from any computer on the network; used mainly in small businesses and departments.
- Cabled LAN: Computers and devices are connected via cables for data transmission.
- Wireless LAN (WLAN): Uses wireless links for connection; consists of wireless access points, wireless network interface cards (NICs), and routers.
  - Wireless Access Point: Broadcasts and receives wireless communication; translates computer signals into wireless signals.
  - Wireless NIC: Equipped with radio antenna for wireless connection.
  - Router: Enables multiple computers to communicate through a wireless access point.
Bluetooth: Wireless communication for information sharing and data synchronization between PDAs, mobile phones, computers, etc.; uses a transceiver chip in each device; has a range of 10 meters and data transfer rate of 720 kbps.
Wide Area Networks (WANs): Connects networks across large geographical areas (e.g., city, country, internationally) using various communication mediums (e.g., telephone lines, fiber optic cables, microwave links, satellite links); used by universities, large companies, and banks with branches in different countries.
IP Address: Unique address that identifies each computer on the Internet.

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Description

This quiz covers various applications of data handling, measurement, control, and modeling. It also touches upon the significance of input devices, such as keyboards, in operating these applications. Test your understanding of how these concepts integrate into practical scenarios.