1. A process having multiple threads of control implies
-
it can do more than one task at a time
it can do only one task at a time, but much faster
it has to use only one thread per process
2. To access the services of operating system, the interface is provided by the
-
system calls
API
library
3. By using ___ techniques, an operating system can create the illusion that a process has its own processor with its own memory.
-
CPU Scheduling
Virtual Memory
Both A and B
4. The multi-user Operating System is based on the concept of ____
-
Time-losing
Time-spooling
Time-gaining
5. Run time mapping from virtual to physical address is done by
-
memory management unit
cpu
pci
6. Memory management technique in which system stores and retrieves data from secondary storage for use in main memory is called?
-
fragmentation
paging
mapping
7. Which structure prohibits the sharing of flies and directories?
-
One level structure
Two level structure
Tree structure
8. The minimum number of page frames that must be allocated to a running process in a virtual memory environment is determined by
-
the instruction set architecture
page size
physical memory size
9. The heads of the magnetic disk are attached to a that moves all the heads as a unit.
-
spindle
disk arm
track
10. The set of tracks that are at one arm position make up a
-
magnetic disks
electrical disks
assemblies
11. On media that use constant linear velocity (CLV), the is uniform.
-
density of bits on the disk
density of bits per sector
the density of bits per track
12. Access time is the highest in the case of ..............
-
Swapping Devices
Cache
Floppy Disk
13. Wild-card specifiers ................
-
Can be used when writing a file
Are only used when printing the contents of files
Provide an easy way of finding groups of related files
14. A fork system call will fail if
- the previously executed statement is also a fork call
the limit on the maximum number of processes in the system would be executed
the limit on the minimum number of processes that can be under execution by a single user would be executed
15. If a thread invokes the exec system call
-
only the exec executes as a separate process
the program specified in the parameter to exec will replace the entire process
the exec is ignored as it is invoked by a thread
16. In most cases, if a process is sent a signal while it is executing a system call
-
the system call will continue execution and the signal will be ignored completely
the system call is interrupted by the signal, and the signal handler comes in
the signal has no effect until the system call completes
17. Which of the following option is an example of a real-time operating system?
-
MAC OS
MS-DOS
Process Control
18. When the process issues an I/O request
-
It is placed in an I/O queue
It is placed in a waiting queue
It is placed in the ready queue
19. Which one of the following is the deadlock avoidance algorithm?
-
banker’s algorithm
elevator algorithm
karn’s algorithm
20. Which of the following are the two parts of the file name?
-
name & identifier
identifier & type
extension & name
21. Which of the following are forms of malicious attack?
- Theft of information
Modification of data
Wiping of information
22. From the following, which is not a common file permission?
-
Write
Execute
Stop
23. In linux a user can load or upload
-
I/O Modules
I/O Devices
File Base I/O
24. Aqua user interface was appeared with?
-
Shells
MAC OS
Windows
25. Operating system manages ................
-
Memory
Processor
I/O Devices
26. OS does not boot itself when a system is ...............
-
Reset
Restarted
Powered on
27. With a shared file
-
actual file exists
there are two copies of the file
the changes made by one person are not reflected to the
28. The multi-user Operating System is based on the concept of .................
-
Time-losing
Time-gaining
Time-sharing
29. To enable a process to wait within the monitor
-
a condition variable must be declared as condition
condition variables must be used as boolean objects
semaphore must be used
30.There are two types of interproccess communication, _________ and __________
-
message receiving, dedicated memory
message passing,shared memory
information sharing, primary memory
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