operating system mcq for competitive exams
1. Which operating systems are more complex than multi-programmed operating systems?
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I/O device-sharing
Resource-sharing
Time-sharing
2. Device independence
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Allows the computer to run without I/O devices
Allows programs to be written much more easily
Makes all devices look the same to the operating system
3. It is responsible for file and I/O management through device drivers.
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Space subsystem
Memory subsystem
File subsystem
4. Running a system in safe mode ..............
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prevents unauthorized access
protects the system from viruses.
loads a minimum number of drivers.
5. The jacketing technique is used to
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convert a blocking system call into non blocking system call
create a new thread
communicate between threads
6. Which of the following options is correct about the windows operating system?
- Windows is based on character user interface (CUI)
Windows is based on command line interface (CLI)
Windows is based on graphical user interface (GUI)
7. Multithreading on a multi – CPU machine
-
has multiple threads of execution
has a single thread of execution
can have multiple or a single thread for execution
8. Selection of an operating system is known as ..................
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Site selection
Product selection
Process selection
9. Termination of the process terminates
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first thread of the process
first two threads of the process
all threads within the process
10. Example of open source operating system is ................
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Linux
Windows
Android
11. In the Many to Many model true concurrency cannot be gained because
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other threads are strictly prohibited from running
other threads are allowed to run
other threads only from other processes are allowed to run
12. Sector interleaving in disks is done by
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single user system
non-multiprogramming system
nom-multitasking system
13. There are two types of separate mode of operation in OS, ______ mode and ________ mode
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process, kernel
system, process
user, kernel
14. Which mode bit is used to indicate kernel mode
15. What is Address Binding?
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going to an address in memory
locating an address with the help of another address
binding two addresses together to form a new address in a different memory space
16. Which mode bit is used to indicate user mode
-
-1
17. A single thread of control allows the process to perform
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only one task at a time
multiple tasks at a time
only two tasks at a time
18. What is the objective of multiprogramming?
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have a process running at all time
have multiple programs waiting in a queue ready to run
to increase cpu utilization
19. Which of the following do not belong to queues for processes?
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job queue
pcb queue
device queue
20. Restricting the child process to a subset of the parent’s resources prevents any process from
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overloading the system by using a lot of secondary storage
under-loading the system by very less cpu utilization
overloading the system by creating a lot of sub-processes
21. A control card is a ________ system concept
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time-sharing
network
batch
22. Peterson’s algorithm is the solution of which of the following problem.
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deadlock
mutual exclusion
trashing
23. What is operating system?
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collection of programs that manages hardware resources
system service provider to the application programs
link to interface the hardware and application programs
24. CPU switching from one process to another requires saving the state of the current process and loading the latest state of the next process. This is known as a ___.
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Program Switch
Context Switch
Process Switch
25. ___ is a part of UNIX OS.
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Kernel
Module
Core
26. PTBR stands for ___.
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Page Table Box Register
Page Table Base Register
Physical Table Base Register
27. When a process is to be executed then only that page of the process, which needs to be currently executed, is swapped into memory. This method is called a ___.
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Demand Paging
Request Paging
Swap Paging
28. What is the ready state of a process?
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when process is scheduled to run after some execution
when process is unable to run until some task has been completed
when process is using the CPU
29. A _______ is a technique for passing information from one program process to another
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job
pipe
user
30. Consider an address of 16 bit, with 4 bit as segment number, then maximum possible augment size is……..
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16
65536
4096
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