Operating System 1000+ MCQ with answer for NDA

1. Taskbar is used for
A. Navigation program
B. Start a program
C. Switching between program
D. All of above
Answer : D

2. ______________ occurs when multiple processes or threads read and write data items so that the final result depends on the order of execution of instructions in the multiple processes.
A. Race condition
B. Mutual exclusion
C. Exception
D. Interrupt
Answer : A

3. A process may create a new process by executing ___________system call.
A. init
B. fork
C. create
D. new
Answer : B

4. 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

5. A _______________in a distributed system is a string of bits or characters that is used to refer to an entity.
A. name
B. attribute
C. identifiers
D. addresses
Answer : A

6. _____________ manage the name spaces and binds an object to its location.
A. Name Server
B. Name agent
C. Context
D. Name resolution
Answer : A

7. 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

8. The algorithm should be scalable i.e. _____________.
A. The system should not enter a state in which nodes spend all their time migrating processes or exchanging control messages without doing any useful work.
B. The system should be able to handle small and large networked systems.
C. The algorithm should not be affected by the crash of one or more nodes in the system.
D. The process assignment decisions should be based on the current load of the system and not on some fixed static policy.
Answer : B

9. Most accurate global time is based on oscillations of the ______________
A. Cesium-130 atom
B. Cesium-133 atom
C. Cesium-136 atom
D. Cesium-139 atom
Answer : B

10. ____ 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

11. RPN stands for
A. Reverse Polish Notation
B. Record Police Notation
C. Record Polish Notation
D. Reverse Police Negation
Answer : A

12. Underlined text, such as text and folder names is referred to as
A. Hyperlink
B. Menu
C. Source drive
D. None of these
Answer : A

13. 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

14. 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

15. Which of the following does not occur during the power-on-self-test (POST)?
A. The scandisk utility begins to run
B. The video card and video memory are tested
C. The BIOS identification process occurs
D. Memory chip are checked to ensure that they are working properly
Answer : A

16. You can move a window to a different position on your screen by dragging it by its
A. Tail
B. Move handle
C. Status bar
D. Title bar
Answer : B

17. _____________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

18. In case of ____________________transparency a file can transparently move to another server.
A. Location
B. Migration
C. Replication
D. Concurrency
Answer : B

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

20. 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

21. A program o be executed must be in ---------------
A. main memory
B. secondary memory
C. virtual memory
D. Read only memory
Answer : A

22. 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

23. Bootstrapping is also known as ______
A. cold-hot boot
B. hot boot
C. hot strap
D. cold boot
Answer : D

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

25. When resources have multiple instances ________ is used for deadlock Avoidance.
A. Bankers algorithm
B. Resource Allocation Graph
C. semaphores
D. all of these
Answer : A

26. The Bankers algorithm is used
A. to prevent deadlock
B. to rectify deadlock
C. to detect deadlock
D. to slove deadlock
Answer : A

27. ______________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

28. BSD stands for_____________________
A. Basic Software Division
B. Berkeley Software Distribution
C. British Software Distribution
D. Berkeley Software data
Answer : B

29. 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

30. 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

31. In___________, the requesting device or devices assert the signal bus_request.
A. Priority encoded arbitration
B. Distributed arbitration by self-selection
C. Priority arbitration
D. Daisy chain arbitration
Answer : D

32. ______________ is a situation in which two computer programs sharing the same resource are effectively preventing each other from accessing the resource, resulting in both programs ceasing to function.
A. Semaphore
B. Deadlock
C. Mutual Exclusion
D. No preemption
Answer : B

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

34. The ___ contains commands associated with the My Computer window
A. Start menu
B. Standard menu
C. System menu
D. None of the above
Answer : C

35. In_________________ model, when a process does a release access, the contents of all the modifications are not immediately sent to other nodes but they are sent only on demand.
A. Release Consistency Model
B. Lazy Release consistency model
C. Weak Consistency Model
D. Processor Consistency Model
Answer : B

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

37. To install the new font
A. Start -> setting -> font
B. Start -> control panel -> font -> install new font
C. Start -> setting -> control panel -> font -> install new font
D. Start -> setting -> control panel -> font
Answer : C

38. A two-byte integer called ____________is interpreted as an index into an array of inodes in a fixed, known location on disk.
A. an inode
B. an inumber
C. an imap
D. an imark
Answer : B

39. A standard UNIX system includes a set of ___________ and a set of ___________.
A. Commands ,files
B. Libraries, Applications
C. Libraries, files
D. Files, Applications
Answer : B

40. Whenever you move a directory from one location to another
A. The directory is moved the source file is not moved
B. All the subdirectory inside that directory are moved
C. All files inside the directory are moved
D. Both b and c
Answer : A

41. ___________variable is not automatically created on all UNIX systems but is used by so many programs that it is considered a standard environment variable.
A. IFS
B. MAIL
C. TERM
D. PATH
Answer : C

42. The command used to create logical drive for specific location of disk
A. Format
B. Fdisk
C. Subst
D. All of the above
Answer : C

43. Which is the layer of a computer system between the hardware and the user program
A. Operating system
B. Operating environent
C. System environment
D. None
Answer : B

44. When a child dies, it sends a _______________signal to its parent.
A. SIGCHLD
B. EDEADLK
C. WNOHANG
D. SEDECHLD
Answer : A

45. A solution to starvation is _____________.
A. segmentation
B. Aging
C. Paging
D. virtual memory
Answer : B

46. 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

47. All of the following are TRUE regarding virtual memory EXCEPT
A. Any amount of RAM can be allocated to virtual memory
B. The setting for the amount of hard disk drive space to allocate virtual memory can be manually change
C. This temporary storage is called the swap file or page file
D. Virtual memory is the physical space o the hard drive
Answer : A

48. 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

49. 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

50. An unauthorized party inserts counterfeit objects into the system is called_________________
A. interruption
B. interception
C. fabrication
D. modification
Answer : C