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Operating Systems: Operating system Overview
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Avg score: 26% • Most missed: “In ____ mode, the kernel runs on behalf of the user.”
Operating Systems: Operating system Overview
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25 Questions

1. Interrupts make an operating system more
2. For reading input, which of the following system call is used?
3. In an interrupt driven input/output __________
4. There are ___ modes of opening a file.
5. A system call is a routine built into the kernel and performs a basic function.
6. write system call returns -1 when ___________
7. To run a program this Setup involves an amount of
8. Which operation is performed by an interrupt handler?
9. In a memory mapped input/output __________
10. DMA is used for __________
11. What is a trap/exception?
12. In ____ mode, the kernel runs on behalf of the user.
13. With the use of multiprogramming batch processing work can be
14. Which of the following system call is used for opening or creating a file?
15. What is an ISR?
16. Which of the following offset is used with lseek system call to set the offset pointer to the end of the file?
17. int close (int fd) - close system call returns ____
18. When we execute a C program, CPU runs in ____ mode.
19. ____ system call is used for positioning the offset pointer.
20. Which of the following system call is used for truncating a file?
21. How does the software trigger an interrupt?
22. Timer is used to prevent a single
23. The chmod command invokes the ____ system call.
24. In a programmed input/output(PIO) __________
25. Which of the following system call is used for closing a file?

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