Operating Systems – Multiple Choice Questions (MCQs)

1. 25. What is a page table?

   • A. A table that stores the mapping between logical addresses and physical addresses
   • B. A table that stores the status of processes
   • C. A table that stores the free memory blocks
   • D. A table that stores the disk blocks

2. 26. What is a Translation Lookaside Buffer (TLB)?

   • A. A cache that stores recently used page table entries
   • B. A buffer for storing input/output data
   • C. A part of the main memory
   • D. A register in the CPU

3. 27. What is segmentation?

   • A. Dividing memory into variable-size blocks called segments
   • B. Dividing memory into fixed-size blocks
   • C. Allocating contiguous memory to processes
   • D. Swapping segments to disk

4. 28. What is virtual memory?

   • A. A technique that allows processes to execute even if they are not entirely in main memory
   • B. A technique for allocating physical memory
   • C. A type of secondary storage
   • D. A way to speed up CPU access

5. 29. What is demand paging?

   • A. Bringing pages into memory only when they are needed
   • B. Bringing all pages of a process into memory at once
   • C. Swapping pages out of memory when they are not needed
   • D. Allocating fixed-size partitions

6. 30. What is a page fault?

   • A. An error that occurs when a requested page is not in memory
   • B. A hardware failure
   • C. A software bug
   • D. A protection violation

7. 31. What is thrashing?

   • A. A condition where the system spends most of its time swapping pages
   • B. A condition where the CPU is overloaded
   • C. A condition where memory is full
   • D. A condition where the disk is slow

8. 32. What is file management?

   • A. The process of organizing and managing computer files and directories
   • B. The process of managing memory
   • C. The process of scheduling processes
   • D. The process of managing input/output devices

9. 33. What is a file system?

   • A. A structure that organizes and manages files on a storage device
   • B. A type of memory
   • C. A scheduling algorithm
   • D. A network protocol

10. 34. Which of the following is a file system type?

    • A. FAT32
    • B. SJF
    • C. TLB
    • D. FCFS

11. 35. What is a directory?

    • A. A special file that contains metadata about other files and directories
    • B. A type of memory block
    • C. A scheduling queue
    • D. An input/output device

12. 36. What are file permissions?

    • A. Attributes that control who can access and modify files
    • B. The size of a file
    • C. The date a file was created
    • D. The location of a file on disk