1. If a process needs I/O to or from a disk, and if the drive or controller is busy then
-
the request will be placed in the queue of pending requests for that drive
the request will not be processed and will be ignored completely
the request will be not be placed
2. If multiple threads are concurrently searching through a database and one thread returns the result then the remaining threads must be
-
continued
cancelled
protected
3. Signals that occur at the same time, are presented to the process
-
one at a time, in a particular order
one at a time, in no particular order
all at a time
4. Which of the following is not TRUE?
-
processes may send each other signals
kernel may send signals internally
a field is updated in the signal table when the signal is sent
5. The usual effect of abnormal termination of a program is
-
core dump file generation
system crash
program switch
6. .................... provides the interface to access the services of the operating system.
-
API
Library
System call
7. Which of the following was the first widely used multiuser, multitasking OS?
-
Unix
MS-DOS
Windows 3.0
8. A process can never be sure that a signal it has sent
- has which identifier
has not been lost
has been sent
9. Instead of starting a new thread for every task to execute concurrently, the task can be passed to a
-
process
thread pool
thread queue
10. Each connection arriving at multi threaded servers via network is generally
-
is directly put into the blocking queue
is wrapped as a task and passed on to a thread pool
is kept in a normal queue and then sent to the blocking queue from where it is dequeued
11. Disk Operating System (DOS) is an example of ___.
-
PC OS
Multi-processor OS
Distributed OS
12. ___ algorithm is used where resources have multiple instances.
13. MAR stands for ___.
14. Segments of user programs are allocated memory by the ___.
15. Which of the following is not an operating system?
16. In a time-sharing operating system, when the time slot given to a process is completed, the process goes from the running state to the :
17. Which one of the following is a synchronization tool?
18. Computer system is divided into how many numbers of components?
19. Process synchronization can be done on
20. Which one of the following is the deadlock avoidance algorithm?
21. For effective operating system, when to check for deadlock?
22. Which of the following is an example of a spooled device?
23. Operating system is resident in memory of which part?
24. Operating System maintains the page table for
25. Because of virtual memory, the memory can be shared among
26. _____ is the concept in which a process is copied into main memory from the secondary memory according to the requirement.
27. The pager concerns with the
28. Swap space exists in
29. A memory buffer used to accommodate a speed differential is called
30. The Operating System should work in a network as well as ___ environment.
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