6. O B To make paging systems work well, we have to consider the following issues except? (Chapter 3) A. naming the processes selecting page size choosing page replacement algorithm determining the working set C D 7. In operating systems, "busy waiting is defined as (Chapter 2) A. the situation where two or more processes are reading or writing some shared data and the final depends on who runs precisely when B. the part of a program where the shared memory is accessed. c. the situation where a variable is continuously tested until some value appears. D. the situation where if one process is using a shared variable or file, the other processes will be exclude doing the same thing. 8. Please use the page table on page 197 (Fig. 3.9) of the OS book to determine the physical address for the virtual address 12345. (Chapter 3) A. 45 OB. so Oc. 57 OD. 345 E. Your answer: O OOO 9. Which of the following statements is NOT true? (Chapter 2) A. The critical region" refers to a part of program where the shared memory is accessed; B. "Producer and Consumer" problem is one of the well-known synchronization problems discussed in the operating system design and implementation; C. Threads are sharing address space but not their stacks; D. "Daemons" are defined as the processes that are inactive and ready to be removed from the memory. Given a virtual address of OxB270 (in hexadecimal) with a page size of 256 bytes, what is its corresponding physical offset within a frame? (Chapter 3) A. B2 B. 27 C. 7D OD 270 E. Your