OS assignment 2

Which of the following is an example of a spooled device?

• (A) A graphic display device

• (B) A secondary storage device in a virtual memory system

• (C) A line printer used to print the output of a number of jobs

• (D) A terminal used to enter input data to a running program

2. Virtual memory is normally implemented by ________

• A) demand paging

• B) buses

• C) virtualization

• D) all of the mentione

3. 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

4. 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

5.Where does the swap space reside ? (GATE 2001)

• (a) RAM

• (b) Disk

• (c) ROM

• (d) On-chip cache

6. A deadlock avoidance algorithm dynamically examines the __________ to ensure that a circular wait condition can never exist.

• a) operating system

• b) resources

• c) system storage state

• d) resource allocation state

7. The operating system keeps a small table containing information about all open files called ____________

• a) file table

• b) directory table

• c) open-file table

• d) system table

8. The number of resources requested by a process ____________

• a) must always be less than the total number of resources available in the system

• b) must always be equal to the total number of resources available in the system

• c) must not exceed the total number of resources available in the system

• d) must exceed the total number of resources available in the system

9. Deadlock prevention is a set of methods ____________

• a) to ensure that at least one of the necessary conditions cannot hold

• b) to ensure that all of the necessary conditions do not hold

• c) to decide if the requested resources for a process have to be given or not

• d) to recover from a deadlock

10. For sharable resources, mutual exclusion ____________

• a) is required

• b) is not required

• c) may be or may not be required

• d) none of the mentioned