Operating System Concepts – Computer System Organization Quiz
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Questions and Answers

What type of signal does the device controller raise to alert the CPU that an operation is complete?

  • Transfer signal
  • Read/write signal
  • Data movement signal
  • Interrupt signal (correct)

    • How does the CPU communicate with the device controller to specify the operation type and data involved?

  • Using wireless communication
  • Through specific registers (correct)
  • Direct communication through data lines
  • Via parallel processing units

    • What is the main purpose of the local buffer in the device controller during data transfers?

  • To store temporary data before processing (correct)
  • To run parallel processing tasks
  • To communicate with the CPU wirelessly
  • To provide power to the device

    • When an interrupt signal is raised, how does the CPU respond?

    <p>Halts its current task and acknowledges the controller</p> Signup and view all the answers

    During the device controller's data movement phase, what does it do when it needs to write data?

    <p>Moves data from the controller's buffer to the device</p> Signup and view all the answers

    What initiates the data transfer process between the CPU and the device controller?

    <p>CPU sends instructions to the device controller</p> Signup and view all the answers

    What is the main storage media that the CPU can directly access?

    <p>Dynamic Random-access Memory (DRAM)</p> Signup and view all the answers

    Why is the bootstrap program stored in EEPROM instead of RAM?

    <p>EEPROM is nonvolatile</p> Signup and view all the answers

    What is the primary reason for not storing the bootstrap program in RAM?

    <p>To ensure the bootstrap program remains intact even when power is turned off</p> Signup and view all the answers

    What type of memory is infrequently written to and is nonvolatile?

    <p>Electrically erasable programmable read-only memory (EEPROM)</p> Signup and view all the answers

    Which type of storage provides large nonvolatile capacity but is slower compared to main memory?

    <p>Secondary storage</p> Signup and view all the answers

    What is the first program to run on a computer when powered on?

    <p>Bootstrap program</p> Signup and view all the answers

    What is responsible for moving data between peripheral devices and local buffer storage in a computer system?

    <p>Device controller</p> Signup and view all the answers

    In a computer system, what provides the operating system with a uniform interface to a device?

    <p>Device controller</p> Signup and view all the answers

    What component of a computer system is responsible for concurrent execution and competing for memory cycles?

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

    Which hardware component is specifically responsible for understanding and managing a device controller?

    <p>Device drivers</p> Signup and view all the answers

    What is in charge of a particular device type in a computer system?

    <p>Device controller</p> Signup and view all the answers

    In a computer system, what connects one or more CPUs to device controllers?

    <p>Shared memory</p> Signup and view all the answers

    What is the basic unit of computer storage?

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

    What technology uses rigid metal or glass platters covered with magnetic recording material?

    <p>Hard Disk Drives (HDD)</p> Signup and view all the answers

    Which storage device technology is faster than hard disks and nonvolatile?

    <p>Solid State Drives (SSDs)</p> Signup and view all the answers

    How many bits make up a byte?

    <p>8</p> Signup and view all the answers

    What determines the logical interaction between a storage device and a computer?

    <p>Disk controller</p> Signup and view all the answers

    Which of the following is not a type of non-volatile memory device mentioned in the text?

    <p>Disk controller</p> Signup and view all the answers

    What is the main difference between hardware and software interrupts?

    <p>Hardware interrupts are generated by hardware devices to signal that they need attention from the OS, while software interrupts are software-generated.</p> Signup and view all the answers

    Which of the following is an example of a software-generated interrupt?

    <p>Division by zero</p> Signup and view all the answers

    What is the role of properly designed operating systems in ensuring program integrity?

    <p>To prevent incorrect or malicious programs from causing incorrect execution of other programs or the OS itself.</p> Signup and view all the answers

    In a computer system, why is it important to distinguish between the execution of operating-system code and user-defined code?

    <p>To ensure that errors in user-defined code do not impact the execution of the operating system or other programs.</p> Signup and view all the answers

    When might an infinite loop in a process trigger a software interrupt?

    <p>When an invalid memory address is accessed.</p> Signup and view all the answers

    What triggers a software interrupt related to a system call?

    <p>The need for an OS service like writing data to a file.</p> Signup and view all the answers

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