Operating System 1000+ MCQ with answer for SSC CGL

1. __ is the program run on a computer when the computer boots up
A. System software
B. Operating system
C. System operations
D. None
Answer : B

2. A process is ____________________
A. A program in Execution.
B. An asynchronous activity.
C. The 'dispatchable' unit.
D. All A, B, C
Answer : D

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

4. 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

5. Having data belonging to two independent processes in the same page is called____________.
A. Buffering
B. Blocking
C. Message-passing
D. False sharing
Answer : D

6. In Windows, start button is used to
A. Device setting
B. Run applications
C. All of above
D. Turn off the system
Answer : C

7. The maximum size of a write file is limited to only
A. Name of the file
B. Extension of the file
C. The amount of memory in your computer
D. All of above
Answer : C

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

9. Pick the wrong statement from the following.
A. UNIX systems originally came with a command interpreter called the Bourne Shell.
B. The cat command takes any characters from standard input, and then echoes them to standard output.
C. A pipe is a means of taking the output of one command and directing it as another command.
D. The manual entry is called a man page, even though it is often more than one page long.
Answer : C

10. A SCSI device can transfer up to----------- of information per second.
A. 40 Mbytes
B. 60 Mbytes
C. 40 Gbytes
D. 60 Gbytes
Answer : A

11. ____________approach can place the data directly into the memory or take the data directly from the memory without direct intervention from the processor.
A. DMA
B. Daisy chain arbitration
C. polling
D. none of these
Answer : A

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

13. Which one is true for unconditional disk formatting?
A. Transfer system files after format
B. Do not check/scan surface after format
C. Destroys every byte of data on a disk by overwriting it with with blank spaces
D. All of above
Answer : C

14. ___________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

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

16. 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

17. 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

18. 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

19. The primary purpose of an operating system is:
A. To allow people to use the computer,
B. To make the most efficient use of the computer hardware
C. To make computers easier to use
D. To keep systems programmers employed
Answer : B

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

21. 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

22. In ____________ location policies a random node is polled to check its state and the task is transferred if it will not be overloaded; polling is continued until a suitable node is found.
A. Threshold
B. Shortest
C. Bidding
D. Pairing
Answer : A

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

24. Wiretapping to capture data in a network is an example of ________________
A. interruption
B. interception
C. fabrication
D. modification
Answer : B

25. 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

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

27. Windows 2000 supports -------------- type of file system
A. NTFS
B. EFS
C. FEFS
D. EFFS
Answer : A

28. 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

29. One of the wonderful things about UNIX is its ___________names.
A. Unlimited path
B. Unlimited directory
C. Limited path
D. Limited file
Answer : A

30. 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

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

32. What is dispatch latency?
A. The time taken by the dispatcher to stop one process and start another
B. The whole time taken by all processor
C. The time taken by the processor to write a file into disk
D. None of Above
Answer : A

33. 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

34. _______refers to the block size of the DSM system, i.e. to the units of sharing and the unit of data transfer across the network when a network block fault occurs.
A. Granularity
B. Coherence
C. Abstraction
D. Synchronization
Answer : A

35. 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

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

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

38. When copying more than one file at a time, you must specify an existing directory as the ___________
A. Source
B. Sub directory
C. Destination.
D. Path name
Answer : C

39. The date and time displays on
A. Taskbar
B. Launch pad
C. Status bar
D. System tray
Answer : D

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

41. Which components appear in the initial Windows start up display?
A. Start menu
B. Dialog boxes
C. Taskbar
D. All of above
Answer : C

42. 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

43. 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

44. The controller can access memory in memory cycles which are not used by the particular bank of memory into which the DMA controller is writing data. This approach, called _________
A. interrupting
B. cycle stealing
C. swapping
D. paging
Answer : B

45. 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

46. A process is already split into pieces, called________________.
A. Tasks
B. Program
C. Processors
D. Routines
Answer : A

47. 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

48. In case of ________________the server automatically copies files to other servers after the files are written.
A. Explicit replication
B. Implicit replication
C. Lazy file replication
D. Group file replication
Answer : C

49. A page fault occurs when
A. the page is not found in the memory
B. the page is found in the memory
C. the Segmentation starts
D. the Deadlock happens
Answer : A

50. ______________ 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