Operating system concepts

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Questions and Answers

Which of the following best describes 'virtual memory'?

  • A method for directly accessing data on a physical disk.
  • A memory management technique creating an illusion of large memory space using disk storage. (correct)
  • A hardware component that speeds up data access.
  • A software that emulates a physical computer.

What is the primary purpose of 'disk scheduling'?

  • To create virtual machines.
  • To manage file system directories.
  • To allocate physical memory to different processes.
  • To optimize access to disk resources, reducing seek time and improving performance. (correct)

Why might a file be stored as a 'binary file'?

  • To store executable programs or complex data structures in a non-human-readable format. (correct)
  • To reduce its size for storage purposes.
  • To ensure compatibility across different operating systems.
  • To make it easily readable by humans.

Which of the following is an example of what might be stored as a 'file'?

<p>A text document, an image, or an executable program. (D)</p> Signup and view all the answers

What is the role of a 'file extension'?

<p>To indicate the format or type of the file. (D)</p> Signup and view all the answers

How does 'direct file access' differ from sequential file access?

<p>It retrieves or manipulates data directly, without needing to access preceding data. (C)</p> Signup and view all the answers

What does an 'absolute path' specify?

<p>The complete and specific location of a file or directory, starting from the root directory. (A)</p> Signup and view all the answers

If you want to visualize the structure of files, subdirectories, and directories, which of the following should you use?

<p>Directory tree. (D)</p> Signup and view all the answers

What is a reasonable analogy for a 'directory' in a computer system?

<p>A container used to organize files into a hierarchical structure. (C)</p> Signup and view all the answers

A software application runs within a 'virtual machine'. What does this imply?

<p>The application is running in a software emulation of a physical computer. (C)</p> Signup and view all the answers

Flashcards

Virtual Machine

Software emulation of a physical computer, providing the same functionality as a physical machine.

Virtual Memory

A memory management technique creating the illusion of large contiguous memory space using disk storage.

Absolute Path

Complete and specific location of a file or directory in a file system, starting from the root directory.

Binary File

A file containing data in a format that is not human-readable; used to store executable programs or complex data structures.

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Direct File Access

Ability to retrieve/manipulate data from a file directly without sequentially accessing preceding data.

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Directory

A container used to organize files into a hierarchical structure on a computer system.

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Directory Tree

A graphical representation or hierarchical structure of directories and subdirectories in a file system.

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Disk Scheduling

The method an OS uses to efficiently schedule access to disk resources, reducing seek time and optimizing performance.

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File

A named collection of data stored on a computer system, which can be text, image, executable, or other information.

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File Extension

A suffix attached to the end of a filename indicating the format or type of file.

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Study Notes

  • Virtual machine: Software emulates a physical computer, and provides the same functionality
  • Virtual memory: Memory management creates the illusion of large memory space using disk storage
  • Absolute path: Complete location of a file or directory within a file system, starting from the root directory
  • Binary file: It stores data not directly human-readable, used to store executable programs
  • Direct file access: Ability to retrieve or manipulate data from a file directly
  • Directory: A container organizes files into a hierarchical structure
  • Directory tree: Graphical representation or hierarchical structure of directories and subdirectories
  • Disk scheduling: OS efficiently schedules access to disk resources, which reduces seek time and optimizes performance
  • File: A named collection of data stored (can be text, image, executable, etc.) on a computer
  • File extension: Filename suffix indicates format or type

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