(A) Which of the following statements are true about virtual memory? (1) With virtual memory more programs can be in the memory (2) With virtual memory programs larger than the main memory can run (3) Virtual memory make programs execute faster (4) Virtual memory improves the I/O transfer speed.

a. 1,2,3 and 4

b, 1,2, and 3

c 1 and 2

d. 3 and 4

(B) In a demand paging system where TLB is used, which of the following statement is true? Choose one.

a. A page fault is always proceeded by TLB miss

b. A page fault is always followed by TLB miss

b. A TLB hit is always followed by a page fault

d. A page fault is always proceeded by TLB hit

(C) Correct ordering (highest to lowest) of page replacements algorithms with respect to the page fault rate is:

a LRU, optimal and FIFO

b. Optimal, LRU and FIFO

c. FIFO, LRU and Optimal

d. LRU, FIFO and optimal