Applying the LRU page replacement to the following reference string. 1 2 4 5 2 1 2 4 The main memory can accommodate 3 pages and it already has pages 1 and 2. Page 1 came in before page 2. How many page faults will occur?

• A. 2
• B. 3
• C. 4
• D. 5

Increasing the RAM of a computer typically improves performance because ____________

• A. Virtual memory increases
• B. Larger rams are faster
• C. Fewer page faults occur
• D. None of the mentioned

The essential content(s) in each entry of a page table is/are ____________

• A. Virtual page number
• B. Page frame number
• C. Both virtual page number and page frame number
• D. Access right information

The minimum number of page frames that must be allocated to a running process in a virtual memory environment is determined by ____________

• A. The instruction set architecture
• B. Page size
• C. Physical memory size
• D. Number of processes in memory

What is the reason for using the LFU page replacement algorithm?

• A. An actively used page should have a large reference count
• B. A less used page has more chances to be used again
• C. It is extremely efficient and optimal
• D. All of the mentioned

What is the reason for using the MFU page replacement algorithm?

• A. An actively used page should have a large reference count
• B. A less used page has more chances to be used again
• C. It is extremely efficient and optimal
• D. All of the mentioned

The implementation of the LFU and the MFU algorithm is very uncommon because ____________

• A. They are too complicated
• B. They are optimal
• C. They are expensive
• D. All of the mentioned

The minimum number of frames to be allocated to a process is decided by the ____________

• A. The amount of available physical memory
• B. Operating system
• C. Instruction set architecture
• D. None of the mentioned

When a page fault occurs before an executing instruction is complete if ____________

• A. The instruction must be restarted
• B. The instruction must be ignored
• C. The instruction must be completed ignoring the page fault
• D. None of the mentioned

Consider a machine in which all memory reference instructions have only one memory address, for them we need at least _____ frame(s).

• A. One
• B. Two
• C. Three
• D. None of the mentioned