Information Systems Infrastructure 2024/2025
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Questions and Answers

What is the maximum number of characters that can be represented by Extended ASCII?

  • 512 characters
  • 128 characters
  • 1024 characters
  • 256 characters (correct)
  • Which of the following correctly defines a Kilobyte (KB)?

  • Approximately 100 bytes
  • Exactly 1000 bytes
  • Approximately 1024 bytes (correct)
  • Approximately 2048 bytes
  • What is the encoding capacity of a Byte?

  • 8 bits (correct)
  • 1 bit
  • 16 bits
  • 4 bits
  • Which one of the following is the correct order of data storage units, from smallest to largest?

    <p>Kilobyte, Megabyte, Gigabyte, Terabyte (A)</p> Signup and view all the answers

    Which component did Von Neumann's model primarily describe?

    <p>Logical framework for computer operation (C)</p> Signup and view all the answers

    What does the clock frequency of a CPU indicate?

    <p>The processing capability of the CPU (A)</p> Signup and view all the answers

    Which type of memory is used to store data temporarily during processing?

    <p>Cache (A)</p> Signup and view all the answers

    What is the primary purpose of Read Only Memory (ROM)?

    <p>To store fixed, unmodifiable data for startup (B)</p> Signup and view all the answers

    What principle does Moore's Law describe?

    <p>The doubling of processor performance every 18 months (D)</p> Signup and view all the answers

    Which of the following accurately describes virtual memory?

    <p>Disk space used to extend the RAM capacity (B)</p> Signup and view all the answers

    What does the term 'digital format' primarily refer to?

    <p>Representation of information in a numerical format. (D)</p> Signup and view all the answers

    Which of the following best describes an analog signal?

    <p>A signal with continuous values that transmit a wide spectrum of information. (C)</p> Signup and view all the answers

    What is a bit in the context of the binary system?

    <p>The smallest unit of information that a computer can process. (A)</p> Signup and view all the answers

    What is the maximum number of different combinations that a byte can represent?

    <p>256 (2⁸) (D)</p> Signup and view all the answers

    Which of the following statements about a digital signal is true?

    <p>Digital signals can represent only two states. (B)</p> Signup and view all the answers

    Which encoding scheme is known for including letters, numbers, and mathematical symbols?

    <p>ASCII (D)</p> Signup and view all the answers

    How does digital data differ from analog data?

    <p>Digital data can be processed by a larger range of devices. (B)</p> Signup and view all the answers

    What is the primary characteristic of the binary system used in computers?

    <p>It consists of only <code>0</code> and <code>1</code> to process data. (B)</p> Signup and view all the answers

    What does RFID stand for?

    <p>Radio Frequency Identification (A)</p> Signup and view all the answers

    Which of the following best describes the function of an RFID reader?

    <p>Both reads and writes information to the tags (C)</p> Signup and view all the answers

    What is the primary technology used in RFID for communication?

    <p>Radio frequency (C)</p> Signup and view all the answers

    Which storage technology is considered solid state?

    <p>Solid State Drive (A)</p> Signup and view all the answers

    What does MIPS stand for in the context of computer performance?

    <p>Million Instructions Per Second (C)</p> Signup and view all the answers

    Which type of computer is described as allowing access to numerous users?

    <p>Mainframe (D)</p> Signup and view all the answers

    What is the primary advantage of using RFID technology over traditional barcodes?

    <p>RFID does not require line of sight for scanning (C)</p> Signup and view all the answers

    Which of the following is NOT a type of output technology?

    <p>Touch Screen (B)</p> Signup and view all the answers

    What is the primary function of the Arithmetic Logic Unit (ALU)?

    <p>Performing calculations and logical operations (C)</p> Signup and view all the answers

    Which device is specifically designed for cursor movement and selection?

    <p>Mouse (A)</p> Signup and view all the answers

    Which component of a QR Code is crucial for indicating the start of the information?

    <p>Start character (A)</p> Signup and view all the answers

    What is the main purpose of a QR Code?

    <p>To compress information for quick scanning by mobile devices (D)</p> Signup and view all the answers

    Which command is used in Windows to check the functionality of qrencode after installation?

    <p>qrcode -V (A)</p> Signup and view all the answers

    Which type of barcode provides a quiet zone, start character, and stop character within its encoding structure?

    <p>Code 128 Barcode (C)</p> Signup and view all the answers

    What does the 'FNC1' represent in a Code 128 Barcode?

    <p>Special function character for data encoding (A)</p> Signup and view all the answers

    What type of input device is a touch pad?

    <p>Pointing device (A)</p> Signup and view all the answers

    Flashcards

    ASCII

    A character encoding standard that uses 7 bits to represent 128 characters.

    Extended ASCII

    A character encoding standard that extends ASCII by using 8 bits to represent 256 characters, allowing for more symbols.

    Byte

    A unit of digital information that consists of 8 bits.

    Kilobyte (KB)

    A unit of digital information equal to approximately one thousand bytes.

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    Von Neumann architecture

    A computer architecture model that includes memory for both instructions and data, and a Central Processing Unit to execute them.

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    Digital Format

    Representing information, like music or documents, in a numerical form usable by computers.

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    Analog Signal

    A signal with continuous values, like a wave, easily distorted.

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    Digital Signal

    A signal with only two possible states: 0 or 1.

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    Binary System

    The computer system using only 0 and 1 to represent data and instructions.

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    Binary Encoding

    Ways computers represent characters and data using 0s and 1s.

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    Input Device

    A device that sends data to a computer.

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    Output Device

    A device that receives data from a computer and displays it.

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    Central Processing Unit (CPU)

    The brain of the computer that executes instructions.

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    Arithmetic Logic Unit (ALU)

    Part of the CPU that performs calculations and logical operations.

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    Communication Bus

    Connects different components of a computer.

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    Mouse

    A pointing device that moves the cursor on the screen.

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    QR Code

    A barcode that stores information that can be read by a mobile device.

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    Barcode

    A visual representation of data using bars and spaces.

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    What is RAM?

    Random Access Memory stores data and instructions during processing; it's volatile, meaning data is lost when the computer is turned off.

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    Why is ROM important?

    Read Only Memory stores permanent data and instructions, like the BIOS, which is essential for starting the computer.

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    What does Cache do?

    Cache (L1 and L2) stores frequently used instructions and data in a fast memory for quick access.

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    What is Virtual Memory?

    Virtual memory uses free disk space to extend RAM's capacity, allowing the computer to run programs that require more memory than physically available.

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    What role does CMOS play?

    CMOS is a chip powered by a small battery, storing essential information for the computer's functioning, like the date and time.

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    RFID

    A technology that uses radio waves to automatically identify and track objects, animals, or people. It uses special electronic tags that store data and respond to queries from readers.

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    RFID Tag

    A small electronic device attached to an object, animal, or person that stores data and can be read by an RFID reader.

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    RFID Reader

    A device that sends radio waves to interrogate RFID tags and retrieve the stored information. It can also write data to the tags.

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    Multitouch

    A touchscreen technology that allows multiple points of contact to be recognized simultaneously, enabling gestures like pinch-to-zoom and multi-finger scrolling.

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    3D Touch

    A touchscreen technology that senses the pressure applied to the screen, allowing for different levels of interaction based on the force applied.

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    Hard Disk

    A magnetic storage device that stores data on spinning platters.

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    Solid State Drive (SSD)

    A type of storage device that uses flash memory instead of spinning platters, offering faster data access and greater durability.

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    Mainframe Computer

    A powerful computer used by large organizations for complex tasks, capable of handling many users and applications simultaneously.

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    Study Notes

    Information Systems

    • Course offered by the Faculty of Economics at the Università Cattolica del Sacro Cuore
    • Academic year 2024/2025

    Information System Infrastructure

    • Binary System
    • Hardware
    • Software
    • Network and Communication System

    Digital Format

    • Representation of information (e.g., music, documents) in a way that allows processing by information technologies
    • "Digital" derives from the English word "digit," meaning "number" or "figure"
    • Digital format is equivalent to numerical format

    Analog Signal

    • A signal is considered analog when the values representing it are continuous (infinite)
    • Analog signals are comparable to waves, transmitting a wide spectrum of information.
    • Analog signals are highly susceptible to interference (jitter).

    Digital Signal

    • Digital signals can only take on two easily distinguishable states, typically 0 and 1
    • Advantages of digital signals are higher resolution and less interference

    Binary System

    • The electronic system used by computers to represent data and instructions.
    • Data and instructions are represented as 0s and 1s.

    Bit

    • The smallest unit of information a computer can process.

    Byte

    • Composed of 8 bits.
    • Represents the fundamental unit of language in electronic computing.
    • Smallest unit of memory capable of holding a character.
    • 8 bits can differentiate 256 different combinations of 0s and 1s (28).

    ASCII

    • Code that includes conventional characters, numbers, mathematical symbols, and Greek letters.
    • ASCII uses 7 bits to represent 128 different characters.

    Extended ASCII

    • Includes 256 characters and different versions for national characters with additional 15 extensions (8 bits).

    Memory Measurements

    • bit: A single binary digit (0 or 1)
    • Byte: 8 bits
    • Kilobyte (KB): approximately 1,000 bytes (210 bytes)
    • Megabyte (MB): approximately 1 million bytes (220 bytes)
    • Gigabyte (GB): approximately 1 billion bytes (230 bytes)
    • Terabyte (TB): approximately 1 trillion bytes (240 bytes)
    • Petabyte (PB): approximately 1 quadrillion bytes (250 bytes)
    • Exabyte (EB): approximately 1 quintillion bytes (260 bytes)
    • Zettabyte (ZB): approximately 1 sextillion bytes (270 bytes)
    • Yottabyte (YB): approximately 1 septillion bytes (280 bytes)

    Hardware

    • Von Neumann modeled the logical framework for computer operation, still valid today.
    • CPU (Central Processing Unit) with Arithmetic Logic Unit (ALU) and Control Unit (CU).
    • Input/output devices and communication bus.
    • Storage Unit
    • Input devices: Keyboard(QWERTY, Ergonomic); Mouse; Pointing stick; Joystick; Touch Screen; Touch Pad; Scanner; Barcode/OCR reader; OMR reader; Microphone; Digital Camera; Digital Video;

    Input Devices

    • Peripheral devices for inputting data, such as:
    • Text/Number input (QWERTY, Ergonomic Keyboard)
    • Pointing (Mouse, Pointing Stick, Joystick)
    • Batch data Entry (Scanner, Barcode/ OCR reader, OMR reader)
    • Audio and video input (Microphone, Digital Camera, Digital Video)
    • Emerging technologies (Laser Keyboard, Voice Recognition, Eye Tracking)

    Mouse

    • A pointing device.
    • Manages a cursor.
    • Components: selection buttons and cursor movement (ball or optical technology).

    Barcode Readers

    • Sections of Code 128 Barcode, including Quiet zone, Start character, [FNC1] + data encoding, Check character, and Stop character.

    QR quick response code

    • Barcode 2.0, interactive and multimedia.
    • To scan a QR code, specific applications are required
    • QR codes compress information.
    • Once scanned, QR codes translate to usable information.

    QR - Demo

    • Instructions to copy VCARD content, save as a file and execute commands, for Windows, Linux, and OS X.
    • Instructions to open the created file and scan with a smartphone.

    RFID radio frequency identification

    • Automatic identification and Data Capture (AIDC).
    • Based on tags or transponders(electronic tags, proximity keys).
    • Readers communicate with tags to store and retrieve data
    • Data Transmission is radio frequency.

    Output Technology

    • Output video (Printer, Inkjet printer, Laser printer, Multifunctional printer, 3D printer, Plotter)
    • Output audio

    input and output: touch screen

    • Functions: Multitouch, Pinch to zoom, 3D Touch

    Storage

    • Hard disk and solid-state devices.
    • Floppy Disk
    • CD, DVD and Blu-ray Disk
    • Magnetic Tape
    • Memory Stick

    Compare memory storage tech

    • Comparison of different types of memory (Magnetic Tape, Hard Disk, CD, DVD, Memory Stick), their speed, data access method, and cost of 1 MB of storage.

    Computer Types

    • Supercomputer (High performance).
    • Mainframe.
    • Workstation.
    • Personal Computer
    • Mobile Device
    • physical dimensions, Typical use, RAM memory, cost in Euros.

    HPC - High Performance Computing

    • Most powerful supercomputers in the world.
    • Performance measured in trillion operations per second.
    • Ranking of fastest computers.

    Mainframe

    • MIPS: Million Instructions Per Second (approximately 18,000)

    Computer (Workstation)

    • Access to numerous users in SMEs or departments.

    Microcomputer and microcontroller

    • General-purpose microprocessors and microcontrollers.

    Architecture of a Personal Computer

    • Block diagram of a personal computer architecture.
    • Components: RAM, ROM, Micro-processor, Hard disk, Network, Modem, Floppy disk, CD-ROM, Mouse, Keyboard, Screen, Audio, Printer.

    Central Unit

    • Operating frequency affects performance.
    • Multicore processors: Dual, Quad, Eight.

    The Moore's Law

    • Processor performance and the number of transistors double roughly every 18 months

    Central Memory

    • RAM (Random Access Memory): temporary storage.
    • Volatile: data lost when the power is off.
    • ROM (Read-Only Memory): permanent storage.
    • Cache (L1 and L2): temporary high-speed memory.
    • Virtual Memory: extends RAM capacity using the hard disk
    • CMOS: maintains configuration settings; powered by a battery.

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    Description

    This quiz covers essential concepts related to information systems infrastructure, focusing on the binary system, hardware, software, and network communication. Additionally, it explores the differences between analog and digital signals, along with the representation of information in digital formats. Test your understanding of these critical topics in information technology!

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