MCQOPTIONS
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MCQOPTIONS
This section includes 36 Mcqs, each offering curated multiple-choice questions to sharpen your Operating System knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which protocol establishes the initial logical connection between a server and a client? |
| A. | transmission control protocol |
| B. | user datagram protocol |
| C. | mount protocol |
| D. | datagram congestion control protocol |
| Answer» D. datagram congestion control protocol | |
| 2. |
If the block of free-space list is free then bit will ____________ |
| A. | 1 |
| B. | 0 |
| C. | any of 0 or 1 |
| D. | none of the mentioned |
| Answer» B. 0 | |
| 3. |
In which type of allocation method each file occupy a set of contiguous block on the disk? |
| A. | contiguous allocation |
| B. | dynamic-storage allocation |
| C. | linked allocation |
| D. | indexed allocation |
| Answer» B. dynamic-storage allocation | |
| 4. |
The data structure used for file directory is called ____________ |
| A. | mount table |
| B. | hash table |
| C. | file table |
| D. | process table |
| Answer» C. file table | |
| 5. |
What is raw disk? |
| A. | disk without file system |
| B. | empty disk |
| C. | disk lacking logical file system |
| D. | disk having file system |
| Answer» B. empty disk | |
| 6. |
What will happens when a process closes the file? |
| A. | per-process table entry is not removed |
| B. | system wide entry’s open count is decremented |
| C. | all of the mentioned |
| D. | none of the mentioned |
| Answer» C. all of the mentioned | |
| 7. |
To create a new file application program calls ____________ |
| A. | basic file system |
| B. | logical file system |
| C. | file-organisation module |
| D. | none of the mentioned |
| Answer» C. file-organisation module | |
| 8. |
Which table contains the information about each mounted volume? |
| A. | mount table |
| B. | system-wide open-file table |
| C. | per-process open-file table |
| D. | all of the mentioned |
| Answer» E. | |
| 9. |
A file control block contains the information about ____________ |
| A. | file ownership |
| B. | file permissions |
| C. | location of file contents |
| D. | all of the mentioned |
| Answer» E. | |
| 10. |
Management of metadata information is done by ____________ |
| A. | file-organisation module |
| B. | logical file system |
| C. | basic file system |
| D. | application programs |
| Answer» C. basic file system | |
| 11. |
The total time to prepare a disk drive mechanism for a block of data to be read from is its |
| A. | latency |
| B. | latency plus transmission time |
| C. | latency plus seek time |
| D. | latency plus seek time plus transmission time |
| Answer» D. latency plus seek time plus transmission time | |
| 12. |
The methods or algorithms which are used to increase the performance of disk storage subsystem is called ............. |
| A. | Disk performing |
| B. | Disk scheduling |
| C. | Disk storing |
| D. | Disk extending |
| Answer» C. Disk storing | |
| 13. |
In the linked allocation, the directory contains a pointer to the :I. first blockII. last block |
| A. | I only |
| B. | II only |
| C. | Both I and II |
| D. | Neither I nor II |
| Answer» D. Neither I nor II | |
| 14. |
The ............... policy restricts scanning to one direction only. |
| A. | SCAN |
| B. | C-SCAN |
| C. | N-Step SCAN |
| D. | Both a and b |
| Answer» C. N-Step SCAN | |
| 15. |
............... policy selects the disk I/O request that requires the least movement of the disk armfrom its current position. |
| A. | FSCAN |
| B. | SSTF |
| C. | SCAN |
| D. | C-SCAN |
| Answer» C. SCAN | |
| 16. |
________ is the time required by a sector to reach below read/write head. |
| A. | Seek Time |
| B. | Latency Time |
| C. | Access time |
| D. | None of the above |
| Answer» C. Access time | |
| 17. |
If the disk head is located initially at 32, find the number of disk moves required with FCFS if the disk queue of I/O blocks requests are 98, 37, 14, 124, 65, 70. |
| A. | 320 |
| B. | 321 |
| C. | 324 |
| D. | None of the above |
| Answer» D. None of the above | |
| 18. |
_______________ in NFS involves the parsing of a path name into seperate directory entries – or components. |
| A. | Path parse |
| B. | Path name parse |
| C. | Path name translation |
| D. | Path name parsing |
| Answer» D. Path name parsing | |
| 19. |
Sequential access method ______ on random access devices. |
| A. | works well |
| B. | doesnt work well |
| C. | maybe works well and doesnt work well |
| D. | none of the mentioned |
| Answer» B. doesnt work well | |
| 20. |
An application loads 100 libraries at startup and loading each library exactly one disk access is required. 10ms is the seek time of the disk to a random location and 6000rpm is the rotational speed of the disk. Neglect the time to transfer data from the disk block once the head has been positioned at the start of the block. What will be the time taken by the application to load all the libraries, if all 100 libraries are loaded from random location on the disk? |
| A. | 1.50s |
| B. | 1.00s |
| C. | 1.87s |
| D. | 0.74s |
| Answer» B. 1.00s | |
| 21. |
In a virtual memory environment the minimum number of page frames that must be allocated to a running process is determined by ___________________. |
| A. | The Number of Processes in the Memory |
| B. | The Instruction Set Architecture |
| C. | The Page Size |
| D. | The Physical Memory Size |
| Answer» C. The Page Size | |
| 22. |
Fragmentation of a file system |
| A. | occurs only is file is not used properly |
| B. | can always be prevented |
| C. | happens in all file systems |
| D. | can be removed by compaction |
| Answer» C. happens in all file systems | |
| 23. |
A machine has a physical memory of 64 Mbyte and a virtual address space of 32 - bit. The page size is 4kbyte, What is the approximate size of the page table? |
| A. | 24 Mbyte |
| B. | 16 Mbyte |
| C. | 2 Mbyte |
| D. | 8 Mbyte |
| Answer» D. 8 Mbyte | |
| 24. |
We have a CPU that generates virtual addresses of 32 bits and the page size is of 4 kbyte. Transition Lookaside Buffer ( TLB ) of the processor can hold a total of 128 page table entries and 4 - way set associative. What is the minimum size of the TLB tag? |
| A. | 16 bit |
| B. | 20 bit |
| C. | 11 bit |
| D. | 15 bit |
| Answer» E. | |
| 25. |
A ___________ contains information about the file, including ownership, permissions, and location of the file contents. |
| A. | File Control Block (FCB) |
| B. | File |
| C. | Device drivers |
| D. | File system |
| Answer» B. File | |
| 26. |
The solution to Critical Section Problem is : Mutual Exclusion, Progress and Bounded Waiting. |
| A. | The statement is false |
| B. | The statement is true |
| C. | The statement is contradictory |
| D. | None of the above |
| Answer» C. The statement is contradictory | |
| 27. |
The time taken by the disk arm to locate the specific address of a sector for getting information is called __________. |
| A. | Rotational Latency |
| B. | Seek Time |
| C. | Search Time |
| D. | Response Time |
| Answer» C. Search Time | |
| 28. |
Which of the following disk scheduling techniques has a drawback of starvation ? |
| A. | SCAN |
| B. | SSTF |
| C. | FCFS |
| D. | LIFO |
| Answer» C. FCFS | |
| 29. |
Which of the following is crucial time while accessing data on the disk? |
| A. | Seek time |
| B. | Rotational time |
| C. | Transmission time |
| D. | Waiting time |
| Answer» B. Rotational time | |
| 30. |
If the Disk head is located initially at 32, find the number of disk moves required with FCFS if the disk queue of I/O blocks requests are 98,37,14,124,65,67. |
| A. | 310 |
| B. | 324 |
| C. | 315 |
| D. | 321 |
| Answer» E. | |
| 31. |
Which file system does Windows 95 typically use ? |
| A. | FAT16 |
| B. | FAT32 |
| C. | NTFS |
| D. | LMFS |
| Answer» C. NTFS | |
| 32. |
The time taken to bring the desired track/cylinder under the head is _________. |
| A. | Seek time |
| B. | Latency time |
| C. | Transfer time |
| D. | Read time |
| Answer» B. Latency time | |
| 33. |
Data reside in file on disk under DOS environment, which of the following file name is invalid ? |
| A. | OSCONCEPTS.doc |
| B. | RAW |
| C. | COMPAQ.BOOK |
| D. | JUMPSTART.BOS |
| Answer» D. JUMPSTART.BOS | |
| 34. |
In the ___________ method of data transfer, the participation of the processor is eliminated during data transfer. |
| A. | Buffering |
| B. | Caching |
| C. | Direct Memory Access |
| D. | Indirect Memory Access |
| Answer» D. Indirect Memory Access | |
| 35. |
WHICH_PROTOCOL_ESTABLISHES_THE_INITIAL_LOGICAL_CONNECTION_BETWEEN_A_SERVER_AND_A_CLIENT??$ |
| A. | transmission control protocol |
| B. | user datagram protocol |
| C. | mount protocol |
| D. | datagram congestion control protocol |
| Answer» D. datagram congestion control protocol | |
| 36. |
If the block of free-space list is free then bit wil? |
| A. | 1 |
| B. | 0 |
| C. | any of 0 or 1 |
| D. | none of the mentioned |
| Answer» B. 0 | |