MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 67 Mcqs, each offering curated multiple-choice questions to sharpen your Operating System knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
In addressing, a many to one relationship is useful for |
| A. | Client Interaction |
| B. | Client/Server Interaction |
| C. | Server Interaction |
| D. | None |
| Answer» C. Server Interaction | |
| 52. |
Consider the methods used by processes P1 and P2 for accessing their critical sections whenever needed, as given below. The initial values of shared boolean variables S1 and S2 are randomly assigned.Method used by P1 :while(S1==S2);Critical sectionS1 = S2; Method used by P2 :while(S1!=S2);Critical sectionS2 = not(S1);Which of the following statements describes properties achieved ? |
| A. | Mutual exclusion but not progress |
| B. | Progress but not mutual exclusion |
| C. | Neither mutual exclusion nor progress |
| D. | Both mutual exclusion and progress |
| Answer» E. | |
| 53. |
The following program consists of 3 concurrent processes and 3 binary semaphores. The semaphores are initialized as S0 = 1, S1 = 0, S2 = 0.Process P0while(true){wait(S0);print '0';release(S1);release(S2);} Process P1wait(S1);release(S0); Process P2wait(S2);release(S0);How many times will P0 print ‘0’ ? |
| A. | At least twice |
| B. | Exactly twice |
| C. | Exactly thrice |
| D. | Exactly once |
| Answer» B. Exactly twice | |
| 54. |
................. is the ability of multiple process to co-ordinate their activities by exchange of information. |
| A. | Synchronization |
| B. | Mutual Exclusion |
| C. | Dead lock |
| D. | Starvation |
| Answer» B. Mutual Exclusion | |
| 55. |
What is said to happen when the result of computation depends on the speed of the processes involved? |
| A. | A deadlock |
| B. | A time lock |
| C. | Cycle stealing |
| D. | Race condition |
| Answer» E. | |
| 56. |
Which is the device that should get the highest priority in assigning the interrupts? |
| A. | Floppy disk |
| B. | Hard disk |
| C. | CPU temperature sensor |
| D. | Keyboard |
| Answer» D. Keyboard | |
| 57. |
In message a set of concurrent processes share a |
| A. | Letter |
| B. | Text |
| C. | Mailbox |
| D. | None |
| Answer» D. None | |
| 58. |
The section of code which accesses shared variables is called as __________. |
| A. | Critical section |
| B. | Block v |
| C. | Procedure |
| D. | Semaphore |
| Answer» B. Block v | |
| 59. |
The degree of multi-programming is : |
| A. | the number of processes executed per unit time |
| B. | the number of processes in the ready queue |
| C. | the number of processes in the I/O queue |
| D. | the number of processes in memory |
| Answer» E. | |
| 60. |
_________ page replacement algorithm suffers from Belady's anamoly. |
| A. | LRU |
| B. | MRU |
| C. | FIFO |
| D. | LIFO |
| Answer» D. LIFO | |
| 61. |
A binary semaphore |
| A. | has the values one or zero |
| B. | is essential to binary computers |
| C. | is used only for synchronization |
| D. | is used only for mutual exclusion |
| Answer» B. is essential to binary computers | |
| 62. |
Semaphore can be used for solving __________. |
| A. | Wait & signal |
| B. | Deadlock |
| C. | Synchronization |
| D. | Priority |
| Answer» D. Priority | |
| 63. |
Mutual exclusion |
| A. | if one process is in a critical region others are excluded |
| B. | prevents deadlock |
| C. | requires semaphores to implement |
| D. | is found only in the Windows NT operating system |
| Answer» B. prevents deadlock | |
| 64. |
Several processes access and manipulate the same data concurrently and the outcome of the execution depends on the particular order in which the access takes place, is called a(n) ____. |
| A. | Shared Memory Segments |
| B. | Entry Section |
| C. | Race condition |
| D. | Process Synchronization |
| Answer» D. Process Synchronization | |
| 65. |
Inter process communication can be done through __________. |
| A. | Mails |
| B. | Messages |
| C. | System calls |
| D. | Traps |
| Answer» C. System calls | |
| 66. |
TO_ENABLE_A_PROCESS_TO_WAIT_WITHIN_THE_MONITOR,?$ |
| A. | a condition variable must be declared as condition |
| B. | condition variables must be used as boolean objects |
| C. | semaphore must be used |
| D. | all of the mentioned |
| Answer» B. condition variables must be used as boolean objects | |
| 67. |
A monitor is a module that encapsulate? |
| A. | shared data structures |
| B. | procedures that operate on shared data structure |
| C. | synchronization between concurrent procedure invocation |
| D. | all of the mentioned |
| Answer» E. | |