Computer Input and Output Devices

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Questions and Answers

What is one significant difference in functionality between 2D and 3D scanners?

2D scanners digitize documents and images, while 3D scanners capture the shape and detail of three-dimensional objects using coordinates.

Explain how QR codes enhance data entry compared to traditional barcodes.

QR codes can store up to 7,000 digits, allowing for efficient data access and entry without manual input, unlike traditional barcodes which store only 30 digits.

Describe the role of microprocessors in digital cameras.

Microprocessors control automatic tasks in digital cameras, including adjusting shutter speed, focus, and aperture, enhancing image capture.

What makes keyboards the most common input device for data entry?

Keyboards convert keystrokes into ASCII values, allowing for efficient text input across various computing systems. Signup and view all the answers

How do pointing devices like a mouse and trackball differ in their operational mechanics?

A mouse operates by moving across a surface to control the cursor, while a trackball is stationary, requiring the user to rotate a ball to move the cursor. Signup and view all the answers

In what ways has cloud computing transformed the storage and processing of data?

Cloud computing allows for remote storage and access to data over the internet, enabling easier collaboration and scalability without heavy local infrastructure. Signup and view all the answers

Identify one primary benefit of using electronic conferencing over traditional face-to-face meetings.

Electronic conferencing allows participants to connect from different locations, reducing travel costs and time while maintaining effective communication. Signup and view all the answers

What are the two main types of anti-malware software, and what do they generally protect against?

The two main types are antivirus and antispyware software, which protect against viruses, worms, and spyware that can compromise system security. Signup and view all the answers

What potential risks arise from the lack of regulation in the development of military androids?

The lack of regulation can encourage the development of more lethal and humanoid technologies, posing threats to human safety. Signup and view all the answers

What type of sensitive data do school management systems hold?

They hold sensitive data such as payment information for parents and payroll information for staff. Signup and view all the answers

List two advantages and one disadvantage of internet banking.

Advantages include 24/7 accessibility and convenience; a disadvantage is vulnerability to internet-related fraud. Signup and view all the answers

What are two applications of 3D printing in medicine?

3D printing can create prosthetics and model simulations for surgeries. Signup and view all the answers

What is one major advantage and disadvantage of using expert systems?

A major advantage is high accuracy; a disadvantage is that users need to be trained to use them effectively. Signup and view all the answers

Identify the three main components of an expert system.

The main components are the knowledge base, inference engine, and user interface. Signup and view all the answers

What security threat is associated with Automated Teller Machines (ATMs)?

ATMs are associated with security risks like theft and fraudulent machines. Signup and view all the answers

How do school management systems facilitate data sorting and filtering?

They enable easy sorting and filtering of various data types for effective management. Signup and view all the answers

What makes online banking advantageous for individuals with mobility challenges?

Online banking offers 24/7 access to services, eliminating the need for physical travel. Signup and view all the answers

In what way can expert systems provide unbiased reporting?

Expert systems deliver consistent results based on the information entered, minimizing human bias. Signup and view all the answers

What is one of the main advantages of Wi-Fi compared to Bluetooth in terms of range?

Wi-Fi offers a greater range, up to 95 meters indoors. Signup and view all the answers

Identify one key reason why Bluetooth is more cost-effective than Wi-Fi.

Bluetooth is cheaper to implement and requires less complex equipment. Signup and view all the answers

Explain how Wi-Fi provides better security than Bluetooth when configured properly.

Wi-Fi security protocols can be set up to encrypt data transmission, while Bluetooth is more vulnerable. Signup and view all the answers

What is the primary function of antivirus software?

Antivirus software scans files for known viruses and removes any identified malicious files. Signup and view all the answers

In what way do microprocessors contribute to the functionality of modern home devices?

Microprocessors execute instructions and process data, enabling advanced features in home devices. Signup and view all the answers

How does multi-device Bluetooth pairing enhance usability?

Bluetooth can connect up to 7 devices simultaneously, allowing easy use of multiple peripherals. Signup and view all the answers

What is a significant disadvantage of multimedia presentations?

Multimedia presentations are susceptible to equipment failure, which can disrupt the presentation. Signup and view all the answers

Describe a common use of Bluetooth technology.

Bluetooth is commonly used to connect devices like headphones and keyboards wirelessly. Signup and view all the answers

Which detection method does anti-malware software use to identify new threats?

Anti-malware software utilizes heuristic analysis to detect new forms of malware. Signup and view all the answers

What are the key advantages of using paper-based presentations?

Paper-based presentations provide permanent copies and accessibility for people with disabilities. Signup and view all the answers

What type of connection range does Bluetooth typically support?

Bluetooth supports a connection range of 5 to 30 meters. Signup and view all the answers

How does cloud-based lookup enhance malware detection?

Cloud-based lookup allows immediate access to the latest malware signatures for faster detection. Signup and view all the answers

Why might video conferencing be considered more effective than audio conferencing?

Video conferencing allows participants to observe body language and visual elements, enhancing communication. Signup and view all the answers

What role does real-time protection play in anti-malware software?

Real-time protection continuously scans for threats and blocks them as they arise. Signup and view all the answers

What role do mobile phone towers play in mobile communication?

They transmit data by connecting phones to the closest tower and relaying connections as users move. Signup and view all the answers

List two advantages of using mobile phones compared to landlines.

Mobile phones allow calls on the move and enable messaging even when the recipient's phone is off. Signup and view all the answers

Define Repetitive Strain Injury (RSI).

RSI is a condition caused by repetitive motions, such as typing or clicking, resulting in pain and discomfort in muscles. Signup and view all the answers

What are two factors that can lead to the development of RSI?

Poor posture and lack of breaks during prolonged computer use are significant factors. Signup and view all the answers

Identify one method to minimize the risk of RSI.

Taking regular breaks can help in muscle recovery and reduce RSI symptoms. Signup and view all the answers

What is one major mental health issue associated with prolonged computer use?

Increased stress and anxiety are common mental health issues due to tight deadlines and digital overload. Signup and view all the answers

Explain a potential social problem linked to social media usage.

Social isolation can occur as in-person interactions decrease due to time spent online. Signup and view all the answers

What is a challenge of using computer-controlled systems in manufacturing?

Initial setup costs for computer systems can be prohibitively high. Signup and view all the answers

How do robots detect environmental feedback?

Robots use sensors to gather feedback about their interactions with the environment. Signup and view all the answers

Describe the significance of PID controllers in advanced robotics.

PID controllers are crucial for managing multiple control loops in sophisticated robotic systems. Signup and view all the answers

What is a key difference between Androids and traditional robots?

Androids are more complex and humanoid, while traditional robots may not have human-like features. Signup and view all the answers

Name one physical health issue caused by prolonged screen time.

Eye strain, leading to symptoms like headaches and dry eyes, is a common issue. Signup and view all the answers

What societal concern arises from reliance on online information?

The spread of misinformation can lead to mistrust and societal harm. Signup and view all the answers

Why are computer-controlled systems considered susceptible to error?

They are vulnerable to human error in programming and execution. Signup and view all the answers

What are the three types of touchscreen technologies mentioned, and what is one key characteristic of each?

Capacitive (durable and responsive), Infra-red (allows various inputs but is more expensive), Resistive (cost-effective but lacks multi-touch). Signup and view all the answers

Describe the primary difference in functionality between inkjet and laser printers.

Inkjet printers use thermal bubble or piezoelectric methods for small-scale printing, while laser printers use static electricity for faster, high-volume output. Signup and view all the answers

How do 3D printers create objects, and what materials can they use?

3D printers use additive manufacturing to build objects layer by layer from materials like resin, metal, or ceramic powders. Signup and view all the answers

What are two advantages and two disadvantages of computer networks?

Advantages include resource sharing and centralized data; disadvantages include hacking risks and equipment costs. Signup and view all the answers

Define the differences between public, private, and hybrid cloud deployment models.

Public clouds are built for public use, private clouds are operated by single organizations, and hybrid clouds combine both models. Signup and view all the answers

What are the three models of cloud computing, and what do they primarily handle?

IaaS (Infrastructure as a Service), PaaS (Platform as a Service), and SaaS (Software as a Service) handle different organizational components. Signup and view all the answers

Why are Bluetooth connections generally preferred over Wi-Fi for low-bandwidth applications?

Bluetooth connections are easier to set up and use less power, making them ideal for connecting small devices over short distances. Signup and view all the answers

What is one major risk associated with cloud computing, specifically regarding data security?

Cybersecurity attacks pose a significant risk, with the average cost of a data breach estimated at $4.88 million. Signup and view all the answers

What impact does network downtime have on businesses?

Downtime can threaten revenue and customer retention and can lead to data failure. Signup and view all the answers

What is the primary function of a router within a computer network?

A router connects different networks and directs data packets between them. Signup and view all the answers

Name one main feature that distinguishes OLED monitors from LCD monitors.

OLED monitors offer thin, lightweight, and flexible displays, unlike traditional LCD monitors. Signup and view all the answers

What is a common characteristic of infrared sensors in security systems?

Infrared sensors detect movement and are often paired with pressure sensors to enhance security. Signup and view all the answers

What are two primary differences between LAN and WAN networks?

LAN networks are localized to small areas while WAN networks cover wider geographic areas. Signup and view all the answers

How does cloud computing facilitate data recovery for businesses?

Cloud computing allows for easier access to backup and recovery protocols established by third-party companies. Signup and view all the answers

Study Notes

Input and Output Devices

Input devices accept data input into a computer
Output devices display the results of computer processing
Scanners digitize documents (2D and 3D)
QR codes link to websites
Digital cameras store images digitally
Keyboards convert keystrokes into computer code
Pointing devices (mouse, trackball) control the cursor
Microphones capture sound input
Touchscreens combine input and display functions (capacitive, infrared, resistive)
Printers (inkjet, laser, 3D) produce hard copies
Light projectors (DLP, LCD) display images on a large screen
Monitors (CRT, LCD, LED, OLED) display computer information

Sensors and Robotics

Sensors measure various physical phenomena
Examples: pressure, infrared
Robotics involve movement, sensing, and planning
Robots use actuators for controlled movement, sensors for data, and processors for decision-making

Comparisons and Features

Printer comparison: monochrome lasers are faster, color lasers are more expensive
Touchscreen technology varies in durability, responsiveness, and input types (capacitive, infrared, resistive)

Networks

A network connects multiple devices for data exchange
Types of networks include LAN, WAN, and WLAN
Components: routers, switches, hubs, bridges, modems, NIC
Wireless technologies include Wi-Fi (high bandwidth, range) and Bluetooth (short range, lower bandwidth)
Internet vs. intranet: global vs. organization-specific
Network environments vary (LAN, WAN, WLAN)
Internet Service Providers (ISPs) provide internet access
Network access devices (desktops, laptops, tablets, smartphones)

Cloud Computing

Cloud computing delivers services via the internet
Cost savings through pay-as-you-go model
Advantages: enhanced security, scalability, accessibility
Disadvantages: loss of control, compatibility issues, security risks, performance concerns, cost mismanagement, vendor lock-in
Deployment models: public, private, hybrid
Cloud computing service providers: Amazon, Azure, Google
Key cloud computing concepts: IaaS, PaaS, SaaS

Bluetooth & Wi-Fi

Bluetooth vs. Wi-Fi: differing bandwidth, range, power consumption, setup complexity
Wi-Fi: operates at higher bandwidths than Bluetooth, good for longer ranges, routers and adaptors required
Bluetooth: best for low-bandwidth, short-range applications, simple connection
Key comparisons: frequency, cost, power, security, ease of use, latency

Anti-Malware and Antivirus Software

Antivirus and anti-malware software are crucial for computer security
Detects and removes malware using signature-based detection, heuristic analysis, sandboxing, cloud-based lookups, real-time protection, and rootkit detection
Malware and viruses differ in their replication capabilities.

Electronic Conferencing

Conferencing calls: video (high cost) vs. audio (low cost)
Video conferencing allows for visual communication
Audio conferencing is a cost-effective option

Microprocessors

Microprocessors (CPUs) are integrated circuits in numerous electronic devices
Examples of devices using microprocessors: laptops, airfryers, washing machines, televisions, routers, vacuums, toothbrushes, heating systems, smoke alarms, wireless mice

Communication Media

Various communication media differ in methods, costs, and impact
Examples: flyers, brochures, newsletters; posters; multimedia presentations; paper-based presentations
Mobile phones: use cellular networks, allow for mobility, message functionality
Advantages and disadvantages of different media (cost, range, timeliness, impact on audiences)

Online/ICT Safety

Repetitive Strain Injury (RSI) is caused by repeated actions (typing, mouse use), poor posture, and lack of breaks
Methods for reducing RSI: breaks, good posture, and alternating tasks
Physical health problems include RSI, back/neck pain, eye strain (Computer Vision Syndrome)
Mental health problems include stress, anxiety, and addiction
Lifestyle issues include sedentary lifestyle, sleep disorders
Preventative measures: ergonomics, regular breaks, screen filters, stress management, healthy lifestyle
Social problems associated with prolonged online exposure: mental health issues, social isolation, distorted self-image, echo chambers, reduced productivity, privacy concerns, physical health issues, and impact on relationships

Computer-Controlled Systems

Computer controls offer speed and consistency, increased productivity and higher accuracy
Drawbacks: high initial costs, potential job displacement, vulnerability to errors

School Management Systems

School management systems (SMS) hold student and staff data (e.g., academic record, joining date, parents’ occupation)

Banking Systems and Applications

Banking systems: from ATMs to internet banking, 24/7 access
Advantages and disadvantages of online banking and other digital transactions.

Information Systems in Medicine

3D printing in medicine: model simulations for surgeries, efficient surgical tool development, tissue/organ creation, prosthetics

Expert System

Expert systems use AI to mimic human expertise
Benefits of expert systems: high accuracy, consistent results, vast data storage, fast response, unbiased opinions
Drawbacks of expert systems: user training requirements, high setup costs, cold responses, reliance on input data

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Description

This quiz covers the various input and output devices used in computing, including their functions and features. Learn about sensors, robotics, and compare different types of printers. Test your knowledge on how these technologies integrate to enhance computer processing.