Computer Interfaces and Communication Standards
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Questions and Answers

What is the main distinction between serial devices and parallel devices?

  • Serial devices transmit multiple bits simultaneously.
  • Parallel devices can only interface with USB ports.
  • Parallel devices are older technology than serial devices.
  • Serial devices communicate one bit at a time. (correct)

    • Which of the following devices is NOT typically connected via a serial port?

  • Scientific instruments
  • Game controllers
  • Webcams (correct)
  • 3D printers

    • What primary function does USB serve compared to older connection standards like serial and parallel ports?

  • USB connects devices exclusively for data transfer.
  • USB requires proprietary drivers for all devices.
  • USB standardizes connections to exchange data and supply power. (correct)
  • USB only connects high-powered devices.

    • Which term refers to the physical interface through which data is transmitted in serial communication?

    <p>Port</p> Signup and view all the answers

    What year was USB first introduced?

    <p>1995</p> Signup and view all the answers

    Which type of devices commonly utilizes COM ports for communication?

    <p>Serial devices</p> Signup and view all the answers

    Which characteristic of USB contributed to its popularity over serial and parallel ports?

    <p>USB can supply power along with data transfer.</p> Signup and view all the answers

    Which device is historically known for being connected via serial ports?

    <p>Mice</p> Signup and view all the answers

    What type of instructions allow a process to execute general-purpose computing tasks?

    <p>Non-privileged instructions</p> Signup and view all the answers

    Which of the following correctly describes non-privileged instructions?

    <p>Can be executed by any process in user mode</p> Signup and view all the answers

    What is the primary function of the interface units in a computer system?

    <p>To supervise and synchronize input and output transfers</p> Signup and view all the answers

    Which of the following Bluetooth specifications is true?

    <p>Functions on a frequency of 2.4 GHz</p> Signup and view all the answers

    What is the role of an I/O interface in a computer system?

    <p>To facilitate communication between internal storage and external devices</p> Signup and view all the answers

    Which of the following correctly identifies a characteristic of privileged instructions?

    <p>Provide access to critical system resources</p> Signup and view all the answers

    What is a common characteristic of non-privileged arithmetic instructions?

    <p>They perform basic calculations like addition and subtraction</p> Signup and view all the answers

    What distinguishes user mode from kernel mode in operating systems?

    <p>User mode provides limited access to system resources</p> Signup and view all the answers

    What type of devices can connect to Bluetooth headphones?

    <p>Any Bluetooth device</p> Signup and view all the answers

    What is a common application of infrared technology?

    <p>Remote control for a TV</p> Signup and view all the answers

    How is throughput commonly represented?

    <p>In bits per second (bps) or bytes per second (Bps)</p> Signup and view all the answers

    Which variable affects the throughput of a USB port?

    <p>The USB generation of the port</p> Signup and view all the answers

    What is the throughput of a call center with 50 employees that answered a total of 3000 calls in an 8-hour shift?

    <p>7.5 calls per hour per employee</p> Signup and view all the answers

    Which of the following is NOT a function of a Bluetooth watch?

    <p>Controlling smart home devices</p> Signup and view all the answers

    How is throughput related to the number of devices connected to a USB port?

    <p>It decreases with more devices connected</p> Signup and view all the answers

    What is the estimated throughput of a soda company producing 1800 cans of soda per minute using 3 machines?

    <p>600 cans per minute</p> Signup and view all the answers

    What is the primary function of the DMA controller in a computer system?

    <p>To facilitate input and output transfers without CPU intervention.</p> Signup and view all the answers

    Which of the following correctly describes a hardware interrupt?

    <p>A program control interruption from an external hardware event.</p> Signup and view all the answers

    What might cause an exception related to peripheral devices?

    <p>An invalid data state or user input error.</p> Signup and view all the answers

    What role do interface units play in a computer system?

    <p>They supervise and synchronize data transfers.</p> Signup and view all the answers

    Which type of error is specifically classified as a software exception?

    <p>User input leading to invalid program execution.</p> Signup and view all the answers

    What is a common issue that may arise with wireless peripheral devices?

    <p>Connectivity problems due to battery life or driver issues.</p> Signup and view all the answers

    What occurs when there is an incompatibility between a USB port and a device?

    <p>The device fails to function properly.</p> Signup and view all the answers

    Which of the following best describes what an exception is in the context of CPU operations?

    <p>A condition that arises during program execution.</p> Signup and view all the answers

    What type of port is commonly used for connecting printers to a computer?

    <p>Parallel Port</p> Signup and view all the answers

    Which port is recognized as the most common connection for external monitors?

    <p>VGA Port</p> Signup and view all the answers

    What is the primary function of a PS/2 port?

    <p>Connecting keyboards and mice</p> Signup and view all the answers

    Which of the following ports is primarily used for video and audio transmission?

    <p>RCA Port</p> Signup and view all the answers

    Which USB connector type is the newest in the series?

    <p>USB Type-C</p> Signup and view all the answers

    What is the main purpose of the Ethernet port?

    <p>Connecting to a local area network</p> Signup and view all the answers

    Which port is specifically used for high-speed data transfer between devices?

    <p>FireWire</p> Signup and view all the answers

    What type of connector is commonly used to connect headphones?

    <p>3.5mm Audio Jack</p> Signup and view all the answers

    What was the primary goal of the group of companies that developed USB?

    <p>To make it easier to connect external devices to PCs</p> Signup and view all the answers

    Which USB version was introduced first and allowed data transfer speeds of 1.5 Mbps?

    <p>USB 1.0</p> Signup and view all the answers

    What feature allows USB to support multiple devices and hubs?

    <p>Multi-point, bus-based communication</p> Signup and view all the answers

    Which USB version introduced high-speed data transfer capabilities of up to 5 Gbps?

    <p>USB 3.0</p> Signup and view all the answers

    Which of the following statements is true regarding the power delivery capabilities of USB?

    <p>USB 3.0 provides power delivery features.</p> Signup and view all the answers

    What distinguishes USB ports from serial ports regarding data transfer?

    <p>Serial ports transfer data one bit at a time.</p> Signup and view all the answers

    In which year was USB 4 introduced, and what is its data transfer speed?

    <p>2019, 40 Gbps</p> Signup and view all the answers

    Which type of devices are typically connected using USB 3.1?

    <p>External SSDs and 4K Video Cameras</p> Signup and view all the answers

    What is one significant advantage of USB over traditional serial ports?

    <p>Ability to connect multiple devices.</p> Signup and view all the answers

    Study Notes

    Peripheral Devices

    • Peripheral devices are auxiliary components, connecting to the central processing unit (CPU)
    • They handle input/output functions without significant computational demands
    • Categorized into input, output, and communication devices

    Input Devices

    • Translate external data into electrical signals understandable by the computer
    • Examples include keyboards, mice, scanners, and microphones

    Output Devices

    • Provide specific output, sometimes with storage capabilities
    • Examples include printers, speakers, and displays

    Communication Devices

    • Facilitate communication between devices or systems
    • Examples include modems, network adapters, and USB drives

    Types of Peripheral Device Connections

    • Programmed I/O: The CPU directly controls data transfer, program-driven
    • Interrupt-driven I/O: External devices interrupt the CPU for data transfer
    • Direct Memory Access (DMA): Allows hardware subsystems to access memory independently of the CPU

    I/O Sub-system

    • Manages data transfer between the computer and external devices
    • Uses interface units to supervise and synchronize input/output

    DMA (Direct Memory Access)

    • Feature of computer systems enabling hardware to access main memory directly bypassing CPU
    • Faster than other methods
    • Used to transfer data between CPU and external I/O devices (e.g., hard drives, printers, network adapters).

    Interrupts and Exceptions

    • Interrupts: External devices or the system signal the CPU to temporarily stop its current task and execute a specific program or routine
    • Exceptions: Conditions arising during program execution, possibly stopping, changing the program's course
    • These can be from various sources (hardware problems, OS issues, damaged libraries, user error).

    Incompatibility Issues

    • USB port and device incompatibility, potentially due to outdated components, legacy devices or software update issues.
    • Wireless peripherals (keyboard, mouse) might also experience issues with connectivity, battery life, or drivers.
    • Loose connections or physical damage to ports causes peripheral malfunctions.

    Privileged and Non-Privileged Instructions

    • Privileged Instructions: Only the operating system kernel or a privileged process, like device drivers can execute these; are for hardware-direct access
    • Non-Privileged Instructions: Can be executed by any process and are general computing tasks like arithmetic, logical operations, and data transfers

    Communication Devices

    • Bluetooth: Short-range wireless technology (2.4 GHz) with 32 feet range, 1 Mbps transfer rate and 721 Kbps throughput -Various types of Bluetooth devices for different applications
    • Infrared (IR): Utilizes electromagnetic radiation and is primarily for transferring data without wires; applications in various sectors including industry, medical, financial, and commercial establishments
    • Throughput: Measures total data transferred per unit of time (e.g., bits per second or bytes per second) used for calculations in different domains.

    USB Ports

    • The Universal Serial Bus (USB) is a widely adopted standard for connecting peripherals to computers
    • Data rates vary by version (e.g., USB 1.0, 2.0, 3.0)
    • Protocol overhead: reduces overall data transfer rate
    • System load can affect the data transfer rate
    • Factors impacting USB throughput include: USB version, number of devices, device types, cable quality

    Serial vs. Parallel Ports

    • Serial Ports: Transfer data one bit at a time, historically used for modems, mice, and keyboards.
    • Parallel Ports: Transmits multiple bits at once. Used for printers.

    Different Types of Ports

    • Various types of ports exist for connecting different devices (e.g., DVI, RCA, HDMI, 3.5mm Audio, Infrared, Game ports).
    • Different types of computer ports are required for accommodating different needs for various hardware and software requirements.

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    Related Documents

    Peripheral Devices PDF

    Description

    Test your knowledge on the distinctions between serial and parallel devices, as well as the role of USB and other connection standards in modern computing. This quiz will cover key concepts related to data transmission, interface units, and I/O operations. Enhance your understanding of how devices communicate within a computer system.

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