MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In a multiprogramming environment : |
| A. | the processor executes more than one process at a time |
| B. | the programs are developed by more than one person |
| C. | more than one process resides in the memory |
| D. | a single user can execute many programs at the same time |
| Answer» D. a single user can execute many programs at the same time | |
| 2. |
In a time-sharing operating system, when the time slot given to a process is completed, the process goes from the running state to the : |
| A. | Blocked state |
| B. | Ready state |
| C. | Suspended state |
| D. | Terminated state |
| Answer» C. Suspended state | |
| 3. |
The only state transition that is initiated by the user process itself is : |
| A. | block |
| B. | wakeup |
| C. | dispatch |
| D. | none of the mentioned |
| Answer» B. wakeup | |
| 4. |
The primary distinction between the short term scheduler and the long term scheduler is : |
| A. | The length of their queues |
| B. | The type of processes they schedule |
| C. | The frequency of their execution |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 5. |
What is a short-term scheduler ? |
| A. | It selects which process has to be brought into the ready queue |
| B. | It selects which process has to be executed next and allocates CPU |
| C. | It selects which process to remove from memory by swapping |
| D. | None of the mentioned |
| Answer» C. It selects which process to remove from memory by swapping | |
| 6. |
What is a medium-term scheduler ? |
| A. | It selects which process has to be brought into the ready queue |
| B. | It selects which process has to be executed next and allocates CPU |
| C. | It selects which process to remove from memory by swapping |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 7. |
If all processes I/O bound, the ready queue will almost always be ______ and the Short term Scheduler will have a ______ to do. |
| A. | full,little |
| B. | full,lot |
| C. | empty,little |
| D. | empty,lot |
| Answer» D. empty,lot | |
| 8. |
What is a long-term scheduler ? |
| A. | It selects which process has to be brought into the ready queue |
| B. | It selects which process has to be executed next and allocates CPU |
| C. | It selects which process to remove from memory by swapping |
| D. | None of the mentioned |
| Answer» B. It selects which process has to be executed next and allocates CPU | |
| 9. |
When a process terminates : |
| A. | It is removed from all queues |
| B. | It is removed from all, but the job queue |
| C. | Its process control block is de-allocated |
| D. | Its process control block is never de-allocated |
| Answer» B. It is removed from all, but the job queue | |
| 10. |
When the process issues an I/O request : |
| A. | It is placed in an I/O queue |
| B. | It is placed in a waiting queue |
| C. | It is placed in the ready queue |
| D. | It is placed in the Job queue |
| Answer» B. It is placed in a waiting queue | |
| 11. |
Which of the following do not belong to queues for processes ? |
| A. | Job Queue |
| B. | PCB queue |
| C. | Device Queue |
| D. | Ready Queue |
| Answer» C. Device Queue | |
| 12. |
The objective of multiprogramming is to : |
| A. | Have some process running at all times |
| B. | Have multiple programs waiting in a queue ready to run |
| C. | To minimize CPU utilization |
| D. | None of the mentioned |
| Answer» B. Have multiple programs waiting in a queue ready to run | |
| 13. |
A single thread of control allows the process to perform: |
| A. | only one task at a time |
| B. | multiple tasks at a time |
| C. | only two tasks at a time |
| D. | all of the mentioned |
| Answer» B. multiple tasks at a time | |
| 14. |
The degree of multiprogramming 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. | |
| 15. |
The entry of all the PCBs of the current processes is in: |
| A. | Process Register |
| B. | Program Counter |
| C. | Process Table |
| D. | Process Unit |
| Answer» D. Process Unit | |
| 16. |
The Process Control Block is: |
| A. | Process type variable |
| B. | Data Structure |
| C. | A secondary storage section |
| D. | A Block in memory |
| Answer» C. A secondary storage section | |
| 17. |
Which of the following is not the state of a process? |
| A. | New |
| B. | Old |
| C. | Waiting |
| D. | Running |
| Answer» C. Waiting | |
| 18. |
The state of a process is defined by: |
| A. | the final activity of the process |
| B. | the activity just executed by the process |
| C. | the activity to next be executed by the process |
| D. | the current activity of the process |
| Answer» E. | |
| 19. |
The number of processes completed per unit time is known as __________ |
| A. | Output |
| B. | Throughput |
| C. | Efficiency |
| D. | Capacity |
| Answer» C. Efficiency | |
| 20. |
A Process Control Block(PCB) does not contain which of the following : |
| A. | Code |
| B. | Stack |
| C. | Bootstrap program |
| D. | Data |
| Answer» D. Data | |
| 21. |
The address of the next instruction to be executed by the current process is provided by the |
| A. | CPU registers |
| B. | Program counter |
| C. | Process stack |
| D. | Pipe |
| Answer» C. Process stack | |
| 22. |
Which system call returns the process identifier of a terminated child? |
| A. | wait |
| B. | exit |
| C. | fork |
| D. | get |
| Answer» B. exit | |
| 23. |
A process stack does not contain |
| A. | Function parameters |
| B. | Local variables |
| C. | Return addresses |
| D. | PID of child process |
| Answer» E. | |
| 24. |
A set of processes is deadlock if |
| A. | each process is blocked and will remain so forever |
| B. | each process is terminated |
| C. | all processes are trying to kill each other |
| D. | none of the mentioned |
| Answer» B. each process is terminated | |
| 25. |
What is interprocess communication? |
| A. | communication within the process |
| B. | communication between two process |
| C. | communication between two threads of same process |
| D. | None of the mentioned. |
| Answer» C. communication between two threads of same process | |
| 26. |
What is the ready state of a process? |
| A. | when process is scheduled to run after some execution |
| B. | when process is unable to run until some task has been completed |
| C. | when process is using the CPU |
| D. | none of the mentioned |
| Answer» B. when process is unable to run until some task has been completed | |
| 27. |
A process can be terminated due to |
| A. | normal exit |
| B. | fatal error |
| C. | killed by another process |
| D. | all of the mentioned |
| Answer» E. | |
| 28. |
In Unix, Which system call creates the new process? |
| A. | fork |
| B. | create |
| C. | new |
| D. | none of the mentioned |
| Answer» B. create | |
| 29. |
In operating system, each process has its own |
| A. | address space and global variables |
| B. | open files |
| C. | pending alarms, signals and signal handlers |
| D. | all of the mentioned |
| Answer» E. | |
| 30. |
The systems which allows only one process execution at a time, are called |
| A. | uniprogramming systems |
| B. | uniprocessing systems |
| C. | unitasking systems |
| D. | none of the mentioned |
| Answer» C. unitasking systems | |
| 31. |
The OS X has ____________ |
| A. | monolithic kernel |
| B. | hybrid kernel |
| C. | microkernel |
| D. | monolithic kernel with modules |
| Answer» C. microkernel | |
| 32. |
Which one of the following is not a real time operating system? |
| A. | VxWorks |
| B. | Windows CE |
| C. | RTLinux |
| D. | Palm OS |
| Answer» E. | |
| 33. |
Which facility dynamically adds probes to a running system, both in user processes and in the kernel? |
| A. | DTrace |
| B. | DLocate |
| C. | DMap |
| D. | DAdd |
| Answer» B. DLocate | |
| 34. |
If a process fails, most operating system write the error information to a ______ |
| A. | log file |
| B. | another running process |
| C. | new file |
| D. | none of the mentioned |
| Answer» B. another running process | |
| 35. |
By operating system, the resource management can be done via |
| A. | time division multiplexing |
| B. | space division multiplexing |
| C. | both time and space division multiplexing |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 36. |
The main function of the command interpreter is |
| A. | to get and execute the next user-specified command |
| B. | to provide the interface between the API and application program |
| C. | to handle the files in operating system |
| D. | none of the mentioned |
| Answer» B. to provide the interface between the API and application program | |
| 37. |
Which one of the following error will be handle by the operating system? |
| A. | power failure |
| B. | lack of paper in printer |
| C. | connection failure in the network |
| D. | all of the mentioned |
| Answer» E. | |
| 38. |
Which one of the following is not true? |
| A. | kernel is the program that constitutes the central core of the operating system |
| B. | kernel is the first part of operating system to load into memory during booting |
| C. | kernel is made of various modules which can not be loaded in running operating system |
| D. | kernel remains in the memory during the entire computer session |
| Answer» D. kernel remains in the memory during the entire computer session | |
| 39. |
To access the services of operating system, the interface is provided by the |
| A. | System calls |
| B. | API |
| C. | Library |
| D. | Assembly instructions |
| Answer» B. API | |
| 40. |
What is operating system? |
| A. | collection of programs that manages hardware resources |
| B. | system service provider to the application programs |
| C. | link to interface the hardware and application programs |
| D. | All of the mentioned |
| Answer» E. | |