Operating System 1000+ MCQ with answer for SBI PO

1. In the case of____________, message remains in the senders address space until the receiver executes the corresponding receive.
A. No buffering
B. Single message buffering
C. Unbounded-capacity buffer
D. Finite bound buffer
Answer : A

2. Identify the distributed computing model from the following statement. In this model, the user's processes need not be migrated to the server machines for getting the work done by those machines.
A. Minicomputer model
B. Workstation model
C. Workstation-Server model
D. Processor pool model
Answer : C

3. In _______, if a processor writes the value 100 to the memory location x, this write operation will only change the contents of its local memory and will not affect the contents of the memory of any other processor.
A. Tightly coupled systems,
B. Loosely coupled systems
C. Parallel processing systems
D. File management system
Answer : B

4. The early ARPAnet is an example of a distributed computing system based on the ________________.
A. Minicomputer model
B. Workstation model
C. Hybrid model
D. Processor pool model
Answer : A

5. Because the I/O devices are not synchronized with the CPU, some information must be exchanged between the CPU and the device to ensure that the data is received reliably. This interaction between the CPU and an I/O device is usually referred to as ____________
A. polling
B. arbitration
C. handshaking
D. interrupting
Answer : C

6. ______________ selects a process from among the ready processes to execute on the CPU.
A. CPU Scheduler
B. Loader
C. Dispatcher
D. Compiler
Answer : A

7. Which of the following is/are external commands?
A. Edit
B. Label
C. Sys
D. All of above
Answer : D

8. Transparent RPC mechanism refers to :
A. Existance of multuple computer visible and a provide a single system image to its users.
B. It runs the program transparently.
C. It is a technique to shift the program to other computer.
D. It is technique in which local procedures and remote procedures are indistinguishable to programmers.
Answer : D

9. The name services of DCE include ________
A. the Cell Directory Service
B. the Global Directory Service
C. the Global Directory Agent
D. A,B and C
Answer : D

10. In MS-DOS, the interfaces and levels of functionality are _______________
A. not well separated.
B. well separated
C. independent
D. dependent
Answer : A

11. Which one of the following statements is true?
A. The cat command cares which file it receives as input or where the input goes.
B. Relative pathnames begin with something other than the slash character
C. UNIX shells never remember their current working directory (CW.
D. The cat command interprets -X as an option character rather than a pathname.
Answer : B

12. ____ runs on a computer hardware and serves as a platform for other system to run on
A. System software
B. Operating system
C. Application system
D. All of above
Answer : B

13. The operating system is the most common type of ___ Software
A. System
B. Application
C. Word processing software
D. Communication
Answer : A

14. Initialization of I/O devices is part of the_________.
A. CPU
B. MSDOS
C. UNIX kernel
D. None of the above
Answer : C

15. A small part of taskbar that has icons of background running applications is
A. Start button
B. Quick launch
C. Task bar
D. System tray
Answer : D

16. Load balancing algorithms in ______________ class use the processor and process characteristics to allocate processes to nodes.
A. Static
B. Dynamic
C. Deterministic
D. Probabilistic
Answer : C

17. DSM stands for______________
A. Direct shared memory
B. Direct system memory
C. Distributed shared memory
D. Distributed system memory
Answer : C

18. ______________ are popular way to improve application through parallelism.
A. Processes
B. Threads
C. Context switching
D. none of these
Answer : B

19. _______________occurs when two or more execution flows are able to run simultaneously.
A. Deadlock
B. Concurrency
C. race condition
D. interrupt
Answer : B

20. ______________is a mechanism the prevents two or more processes from accessing a shared resource simultaneously.
A. Livelock
B. Preemption
C. Semaphore
D. either or
Answer : C

21. ______________ refers to the technology in which some space in hard disk is used as an extension of main memory.
A. Cache memory
B. Pagng
C. Virtual memory
D. Associative memory
Answer : C

22. You can use print manage window
A. To cancel the print job
B. To check status of files in the print queue
C. To interrupt printing
D. All of the above
Answer : D

23. In case of good process migration mechanism, _____________ means failure of any node other than the one on which the process is running should not affect the execution of the process.
A. Robustness
B. Efficiency
C. Transparent
D. Interference
Answer : A

24. Which buffering strategy is used for implementing synchronous communication?
A. Single message buffer
B. Unbounded - Capacity buffer
C. Finite-Bound Buffer
D. All can be used.
Answer : A

25. The problem with logical dumping is ________________
A. very costly
B. very slow
C. human errors
D. all of these
Answer : B

26. ______________approach simplifies debugging and system verification.
A. Kernel
B. Layered
C. Extended
D. Virtual machine
Answer : B

27. In case of modification an unauthorized party not only gains access to but tampers with an asset. This is an attack on ____________________.
A. availability
B. confidentiality
C. integrity
D. authenticity
Answer : C

28. In the case of____________ , changes to an open file are only locally visible.
A. session semantics
B. immutable files
C. atomic transactions
D. None of the above.
Answer : A

29. Recently deleted files are stored in
A. Taskbar
B. Desktop
C. My computer
D. Recycle bin
Answer : D

30. ______________is responsible for allocating primary memory to processes and for assisting the programmer in loading and storing the contents of the primary memory.
A. Operating system
B. Memory manager
C. Database administrator
D. RAM
Answer : B

31. _______________refers to a strategy where whenever a resource is requested, it is only granted if it cannot result in deadlock.
A. Deadlock Prevention
B. Livelock
C. Deadlock avoidance
D. none of these
Answer : C

32. Which of the following is an essential file of a MS-DOS boot disk?
A. COMMANCOM
B. START.COM
C. VER.COM
D. TREE.COM
Answer : A

33. An orphan process is automatically inherited by the _____and becomes a _______ of this process.
A. 'init' process, father
B. 'init' process, child
C. 'initial process, father
D. 'it' process, child
Answer : B

34. SRM stands for
A. Security Resource Manager
B. Secret Resource Manager
C. Security Reference Monitor
D. Security Reference Manual
Answer : C

35. An option commonly takes the form of a _____followed by __________characters.
A. dot, one or more
B. dash, only one
C. dash, one or more
D. dot,only two
Answer : C

36. Two clocks are said to be synchronized at a particular instance of time if the difference in time values of the two clocks is less than some specified constant. The difference in time values of two clocks is called ___________.
A. Interrupt
B. Clock Frequency
C. Clock Ticks
D. Clock Skew
Answer : D

37. A sequence of instructions telling the computer what to do is called a_____________
A. program
B. language
C. translator
D. package
Answer : A

38. The two sub systems of user mode layer of windows 2000 are _________ and __________
A. excel, executive
B. environment, integral
C. orbit , kernel
D. Kernel , executive
Answer : B

39. The Basic Input Output System (BIOS) resides in
A. RAM
B. ROM
C. The CPU
D. Memory Cache
Answer : B

40. The _________takes any characters from standard input, and then echoes them to standard output.
A. kill character
B. cat command
C. cate command
D. control command
Answer : B

41. The essential difference between an operating system like Linux and one like Windows is that
A. Linux is a proprietary whereas Windows is not
B. Windows can run with an Intel processor, whereas Linux cannot
C. There are multiple versions of Linux, but only one version of Windows
D. Any programmer can modify Linux code which is not permitted with Windows
Answer : D

42. _____________typically contains temporary data such as subroutine parameter, return address, and temporary variables.
A. Current value of Program Counter
B. Value of the variables
C. The process stack
D. A data section
Answer : C

43. What is the function of radio button?
A. To select multiple option
B. To select single option
C. To select all option D. All of above
Answer : B

44. Which of the following is suitable after you install new drivers?
A. Hibernate
B. Sleep
C. Restart
D. Shut Down
Answer : C

45. Once text has been cut to the clipboard, you can____hat text into another document
A. Copy
B. Paste
C. Transfer
D. None of the above
Answer : B

46. Which of the following is not essential to shut down your computer?
A. XCOPY
B. Edit
C. Sys
D. None of the above
Answer : D

47. In layered approach each layer uses the functions and services of ------------------
A. kernel
B. lower-level layers
C. higher-level layers
D. all of these
Answer : B

48. ____________ file system allows sharing in multiple different locations grouped under one folder.
A. Direct
B. distributed
C. sequential
D. parallel
Answer : B

49. Choose the correct statement from the following.
A. In computer terminology, variables are symbols which stand for some value.
B. An alternative method for executing the commands in the file backup is to make the file as directory.
C. The restricted shell gives more control to the system administrator and restricts the options of the user.
D. The decision making done by computer programs is in the form of conditional execution.
Answer : C

50. __________ deals with when a modified page should be written out to secondary memory.
A. Cleaning policy
B. Fetch policy
C. Frame locking
D. None
Answer : A