MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 11 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. |
How does the Hardware trigger an interrupt? |
| A. | Sending signals to CPU through a system bus |
| B. | Executing a special program called interrupt program |
| C. | Executing a special program called system program |
| D. | Executing a special operation called system call |
| Answer» B. Executing a special program called interrupt program | |
| 2. |
In the layered approach of Operating Systems __________ |
| A. | Bottom Layer(0) is the User interface |
| B. | Highest Layer(N) is the User interface |
| C. | Bottom Layer(N) is the hardware |
| D. | Highest Layer(N) is the hardware |
| Answer» C. Bottom Layer(N) is the hardware | |
| 3. |
In an interrupt driven input/output __________ |
| A. | the CPU uses polling to watch the control bit constantly, looping to see if a device is ready |
| B. | the CPU writes one data byte to the data register and sets a bit in control register to show that a byte is available |
| C. | the CPU receives an interrupt when the device is ready for the next byte |
| D. | the CPU runs a user written code and does accordingly |
| Answer» D. the CPU runs a user written code and does accordingly | |
| 4. |
In a programmed input/output(PIO) __________ |
| A. | the CPU uses polling to watch the control bit constantly, looping to see if a device is ready |
| B. | the CPU writes one data byte to the data register and sets a bit in control register to show that a byte is available |
| C. | the CPU receives an interrupt when the device is ready for the next byte |
| D. | the CPU runs a user written code and does accordingly |
| Answer» B. the CPU writes one data byte to the data register and sets a bit in control register to show that a byte is available | |
| 5. |
In a memory mapped input/output __________ |
| A. | the CPU uses polling to watch the control bit constantly, looping to see if a device is ready |
| B. | the CPU writes one data byte to the data register and sets a bit in control register to show that a byte is available |
| C. | the CPU receives an interrupt when the device is ready for the next byte |
| D. | the CPU runs a user written code and does accordingly |
| Answer» C. the CPU receives an interrupt when the device is ready for the next byte | |
| 6. |
DMA is used for __________ |
| A. | High speed devices(disks and communications network) |
| B. | Low speed devices |
| C. | Utilizing CPU cycles |
| D. | All of the mentioned |
| Answer» B. Low speed devices | |
| 7. |
What is an interrupt vector? |
| A. | It is an address that is indexed to an interrupt handler |
| B. | It is a unique device number that is indexed by an address |
| C. | It is a unique identity given to an interrupt |
| D. | None of the mentioned |
| Answer» B. It is a unique device number that is indexed by an address | |
| 8. |
What is an ISR? |
| A. | Information Service Request |
| B. | Interrupt Service Request |
| C. | Interrupt Service Routine |
| D. | Information Service Routine |
| Answer» D. Information Service Routine | |
| 9. |
What is a trap/exception? |
| A. | hardware generated interrupt caused by an error |
| B. | software generated interrupt caused by an error |
| C. | user generated interrupt caused by an error |
| D. | none of the mentioned |
| Answer» C. user generated interrupt caused by an error | |
| 10. |
How does the software trigger an interrupt? |
| A. | Sending signals to CPU through bus |
| B. | Executing a special operation called system call |
| C. | Executing a special program called system program |
| D. | Executing a special program called interrupt trigger program |
| Answer» C. Executing a special program called system program | |
| 11. |
The initial program that is run when the computer is powered up is called __________ |
| A. | boot program |
| B. | bootloader |
| C. | initializer |
| D. | bootstrap program |
| Answer» E. | |