OS Complete Solutions | Study

1. In monitors, it's possible that a condition variable be set to a negative value.
ANSWER-01 (T or F): F
2. When a compiler converts source code to machine code, the memory addresses
are physical addresses.
ANSWER-02 (T or F): T
3. The modified bit can never be 1 if the reference bit is 0.
ANSWER-03 (T or F): F
4. A segment is a fixed size of memory, and all segments are the same size.
ANSWER-04 (T or F): F
5. The I/O buffer cache cannot be implemented as part of the Standard I/O library.
ANSWER-05 (T or F): T
6. If minimizing average turnaround time is important, Multi-level Feedback Queues
is preferred over Round-Robin.
ANSWER-06 (T or F): F

7. In FIFO scheduling, if all processes run for a finite amount of time, starvation is
possible.
ANSWER-07 (T or F): F
8. The open system call is typically significantly more time-consuming than the read
system call.
ANSWER-08 (T or F): F
9. The purpose of the SETUID mechanism in UNIX is to perform a domain switch.
ANSWER-09 (T or F): T
10. A TLB miss is more time consuming than a page fault.
ANSWER-10 (T or F): F
11. Loading the PC (program counter) register should be the last operation in a
context switch.
ANSWER-11 (T or F): T
12. Public Key encryption is more time consuming than Secret Key encryption.

ANSWER-12 (T or F): T
13. Device drivers are part of the device-independent portion of the I/O system.
ANSWER-13 (T or F): T
14. The file system metadata area of a file system contains file names of files.
ANSWER-14 (T or F): T
15. When using a semaphore, a process can learn its integer value.
ANSWER-15 (T or F): T
16. When using a semaphore, a process can learn its integer value.
ANSWER-16 (T or F): T
17. The Two Generals problem shows that one can achieve perfect (100% reliable)
communication out of imperfect (strictly less than 100% reliable) communication
channels.
ANSWER-17 (T or F): F