Virtual memory is normally implemented by ________

• A. Demand paging
• B. Buses
• C. Virtualization
• D. All of the mentioned

Segment replacement algorithms are more complex than page replacement algorithms because ____________

• A. Segments are better than pages
• B. Pages are better than segments
• C. Segments have variable sizes
• D. Segments have fixed sizes

A swapper manipulates ___________ whereas the pager is concerned with individual _______ of a process.

• A. The entire process, parts
• B. All the pages of a process, segments
• C. The entire process, pages
• D. None of the mentioned

Using a pager ____________

• A. Increases the swap time
• B. Decreases the swap time
• C. Decreases the swap time & amount of physical memory needed
• D. Increases the amount of physical memory needed

The valid – invalid bit, in this case, when valid indicates?

• A. The page is not legal
• B. The page is illegal
• C. The page is in memory
• D. The page is not in memory

A page fault occurs when?

• A. A page gives inconsistent data
• B. A page cannot be accessed due to its absence from memory
• C. A page is invisible
• D. All of the mentioned

When a page fault occurs, the state of the interrupted process is ____________

• A. Disrupted
• B. Invalid
• C. Saved
• D. None of the mentioned

When a process begins execution with no pages in memory?

• A. Process execution becomes impossible
• B. A page fault occurs for every page brought into memory
• C. Process causes system crash
• D. None of the mentioned

If the memory access time is denoted by ‘ma’ and ‘p’ is the probability of a page fault (0 <= p <= 1). Then the effective access time for a demand paged memory is ____________

• A. P x ma + (1-p) x page fault time
• B. Ma + page fault time
• C. (1-p) x ma + p x page fault time
• D. None of the mentioned

When the page fault rate is low ____________

• A. The turnaround time increases
• B. The effective access time increases
• C. The effective access time decreases
• D. Turnaround time & effective access time increases