Operating System Concepts Chapter 1 Quiz
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Questions and Answers

What is the smallest unit of storage in a computer?

  • Kilobyte
  • Byte
  • Bit (correct)
  • Word

    • How many bits make up a byte?

  • 16 bits
  • 32 bits
  • 8 bits (correct)
  • 4 bits

    • In most computers, what is the smallest convenient chunk of storage?

  • Kilobyte
  • Byte (correct)
  • Bit
  • Megabyte

    • What is the term used for a computer architecture's native unit of data?

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

    How many bytes make up a typical word in a computer with 64-bit registers and memory addressing?

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

    What is the role of interrupts in a computer system?

    <p>Controlling the flow of data between the CPU and memory</p> Signup and view all the answers

    What is the equivalent number of bytes for a petabyte?

    <p>$1,024^5$ bytes</p> Signup and view all the answers

    Which term describes the mode where the operating system has unrestricted access to hardware resources?

    <p>Kernel mode</p> Signup and view all the answers

    What components are part of a modern multiprocessor computer system?

    <p>Multiple CPUs and shared memory</p> Signup and view all the answers

    In what context are operating systems used according to the text?

    <p>In various computing environments</p> Signup and view all the answers

    What is the main function of an operating system?

    <p>To manage resources and provide services for computer programs</p> Signup and view all the answers

    What is responsible for hiding the peculiarities of hardware devices from the user?

    <p>I/O subsystem</p> Signup and view all the answers

    What determines what is in memory and when, optimizing CPU utilization and computer response to users?

    <p>Memory management</p> Signup and view all the answers

    What provides mechanisms for process synchronization and communication in operating systems?

    <p>Process management</p> Signup and view all the answers

    In a single-threaded process, how does the process execute instructions?

    <p>Sequentially, one at a time</p> Signup and view all the answers

    What is responsible for providing mechanisms for deadlock handling in an operating system?

    <p>Process management</p> Signup and view all the answers

    Which activity involves creating and deleting both user and system processes?

    <p>Process creation and deletion</p> Signup and view all the answers

    What is the purpose of caching in a computer system?

    <p>To copy information into a faster storage system for quicker access</p> Signup and view all the answers

    What is the role of a device driver in an operating system?

    <p>Provide a uniform interface between device controllers and the kernel</p> Signup and view all the answers

    In a modern computer, what architecture does it typically follow?

    <p>von Neumann architecture</p> Signup and view all the answers

    What is the purpose of Direct Memory Access (DMA) in a computer system?

    <p>Allow high-speed I/O devices to transfer data directly to main memory without CPU intervention</p> Signup and view all the answers

    Which term describes software that provides services outside of the kernel in an operating system?

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

    What is the main goal of multiprogramming in a batch system?

    <p>Organize jobs so that the CPU always has one to execute</p> Signup and view all the answers

    In multitasking (timesharing) systems, what is the expected response time for user interactions?

    <p>&lt; 1 second</p> Signup and view all the answers

    What does swapping do in a multi-programmed system when processes don't fit in memory?

    <p>Moves processes between main memory and secondary storage</p> Signup and view all the answers

    What is the main goal of an operating system?

    <p>To make the computer system convenient to use</p> Signup and view all the answers

    Which component of the computer system controls and coordinates the use of hardware among various applications and users?

    <p>Operating system</p> Signup and view all the answers

    What is the kernel in an operating system?

    <p>The one program running at all times on the computer</p> Signup and view all the answers

    Which statement best describes what users of dedicated systems like workstations want from an operating system?

    <p>Convenience, ease of use, and good performance</p> Signup and view all the answers

    Which component of a computer system provides basic computing resources?

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

    What is the role of device controllers in a computer system's operation?

    <p>Control and manage I/O devices</p> Signup and view all the answers

    Which type of device informs the CPU that it has finished its operation in a computer system?

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

    What does the term 'interrupt-driven I/O cycle' refer to in a computer system?

    <p>Cycle where I/O operations are done concurrently with CPU execution</p> Signup and view all the answers

    What is the main difference between main memory and secondary storage in a computer system?

    <p>Main memory has faster access speeds than secondary storage</p> Signup and view all the answers

    Study Notes

    Computer Storage

    • A bit is the basic unit of computer storage and can have a value of 0 or 1.
    • A byte is a collection of 8 bits and is the smallest convenient chunk of storage.
    • A word is a unit of data that is native to a computer's architecture and is made up of one or more bytes.

    Storage Hierarchy

    • Storage systems are organized in a hierarchy based on speed, cost, and volatility.
    • Caching is the process of copying information into a faster storage system to improve performance.
    • The main memory (RAM) can be viewed as a cache for secondary storage.

    Computer-System Organization

    • A computer system can be divided into four components: hardware, operating system, application programs, and users.
    • The operating system acts as a resource allocator and control program, managing the execution of user programs.

    Operating System Definition

    • There is no universally accepted definition of an operating system.
    • An operating system can be viewed as "everything a vendor ships when you order an operating system".
    • The kernel is the part of the operating system that runs at all times on the computer.

    Computer-System Operation

    • One or more CPUs, device controllers, and memory are connected through a common bus.
    • The CPU, I/O devices, and devices controllers can execute concurrently, competing for memory cycles.
    • I/O is performed from device to local buffer of controller, and the device controller informs the CPU that it has finished its operation by causing an interrupt.

    Interrupt Handling

    • Interrupt architecture must save the address of the interrupted instruction.
    • A trap or exception is a software-generated interrupt caused by an error or user request.
    • The operating system is interrupt-driven, and interrupt handling involves preserving the state of the CPU, determining the type of interrupt, and processing the interrupt.

    Storage Structure

    • Main memory is a large storage media that the CPU can access directly, and is typically volatile and random-access.
    • Secondary storage is an extension of main memory that provides large nonvolatile storage capacity, and includes hard disk drives and non-volatile memory devices.

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    Description

    Test your knowledge on the key topics covered in Chapter 1 of the book 'Operating System Concepts - 10th Edition' by Silberschatz, Galvin, and Gagne. Questions cover concepts like computer-system organization, architecture, operations, resource management, security, and protection.

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