operating system 1

39. What will happen in the single level directory? a) All files are contained in the same directory b) All files are contained in different directories all at the same level c) Depends on the operating system d) None of the mentioned

a) All files are contained in the same directory

28. The _________ presents a uniform device-access interface to the I/O subsystem, much as system calls provide a standard interface between the application and the operating system. a) Device drivers b) I/O systems c) Devices d) Buses

a) Device drivers

Cascading termination refers to the termination of all child processes if the parent process terminates ______ a) Normally or abnormally b) Abnormally c) Normally d) None of the mentioned

a) Normally or abnormally

45. The _______ program initializes all aspects of the system, from CPU registers to device controllers and the contents of main memory, and then starts the operating system. a) bootstrap b) main c) bootloader d) rom

a) bootstrap

Where is the operating system placed in the memory? a) either low or high memory (depending on the location of interrupt vector) b) in the low memory c) in the high memory d) none of the mentioned

a) either low or high memory (depending on the location of interrupt vector)

24. The operating system and the other processes are protected from being modified by an already running process because ____________ a) every address generated by the CPU is being checked against the relocation and limit registers b) they have a protection algorithm c) they are in different memory spaces d) they are in different logical addresses

a) every address generated by the CPU is being checked against the relocation and limit registers

19. For an effective operating system, when to check for deadlock? a) every time a resource request is made at fixed time intervals b) at fixed time intervals c) every time a resource request is made d) none of the mentioned

a) every time a resource request is made at fixed time intervals

5. CPU scheduling is the basis of ___________ a) multiprogramming operating systems b) larger memory sized systems c) multiprocessor systems d) none of the mentioned

a) multiprogramming operating systems

21. Swapping _______ be done when a process has pending I/O, or has to execute I/O operations only into operating system buffers. a) must never b) maybe c) can d) must

a) must never

47. Which principle states that programs, users, and even the systems be given just enough privileges to perform their task? a) principle of least privilege b) principle of process scheduling c) principle of operating system d) none of the mentioned

a) principle of least privilege

43. Whenever a process needs I/O to or from a disk it issues a ______________ a) system call to the operating system b) a special procedure c) system call to the CPU d) all of the mentioned

a) system call to the operating system

36. If the sum of the working - set sizes increases, exceeding the total number of available frames ____________ a) the operating system selects a process to suspend b) the system crashes c) then the process crashes d) the memory overflows

a) the operating system selects a process to suspend

10. Which one of the following is not a real time operating system? a) RTLinux b) Palm OS c) QNX d) VxWorks

b) Palm OS

4. To access the services of the operating system, the interface is provided by the ___________ a) Library b) System calls c) Assembly instructions d) API

b) System calls

9. If a process fails, most operating system write the error information to a ______ a) new file b) another running process c) log file d) none of the mentioned

b) another running process

46. In SCSI disks used in high end PCs, the controller maintains a list of _________ on the disk. The disk is initialized during ________ formatting which sets aside spare sectors not visible to the operating system. a) destroyed blocks, partitioning b) bad blocks, low level formatting c) destroyed blocks, high level formatting d) bad blocks, partitioning

b) bad blocks, low level formatting

25. Using transient code, _______ the size of the operating system during program execution. a) maintains b) changes c) increases d) decreases

b) changes

50. In Unix, which system call creates the new process? a) create b) fork c) new d) none of the mentioned

b) fork

6. Which one of the following is not true? a) kernel remains in the memory during the entire computer session b) kernel is made of various modules which can not be loaded in running operating system c) kernel is the first part of the operating system to load into memory during booting d) kernel is the program that constitutes the central core of the operating system

b) kernel is made of various modules which can not be loaded in running operating system

31. For real time operating systems, interrupt latency should be ____________ a) zero b) minimal c) maximum d) dependent on the scheduling

b) minimal

37. The information about all files is kept in ____________ a) operating system b) separate directory structure c) swap space d) none of the mentioned

b) separate directory structure

48. Network operating system runs on ___________ a) every system in the network b) server c) both server and every system in the network d) none of the mentioned

b) server

49. What are the types of distributed operating systems? a) Zone based Operating system b) Level based Operating system c) Network Operating system d) All of the mentioned

c) Network Operating system

13. In a timeshare operating system, when the time slot assigned to a process is completed, the process switches from the current state to? a) Suspended state b) Terminated state c) Ready state d) Blocked state

c) Ready state

35. What are the characteristics of stack based IDS? a) It is programmed to interpret a certain series of packets b) It models the normal usage of the network as a noise characterization c) They are integrated closely with the TCP/IP stack and watch packets d) The host operating system logs in the audit information

c) They are integrated closely with the TCP/IP stack and watch packets

17. The portion of the process scheduler in an operating system that dispatches processes is concerned with ____________ a) assigning ready processes to waiting queue b) assigning running processes to blocked queue c) assigning ready processes to CPU d) all of the mentioned

c) assigning ready processes to CPU

42. On systems where there are multiple operating system, the decision to load a particular one is done by _____________ a) process control block b) file control block c) boot loader d) bootstrap

c) boot loader

16. Transient operating system code is a code that ____________ a) stays in the memory always b) never enters the memory space c) comes and goes as needed d) is not easily accessible

c) comes and goes as needed

40. The operating system _______ the links when traversing directory trees, to preserve the acyclic structure of the system. a) deletes b) considers c) ignores d) none of the mentioned

c) ignores

30. Hard real time operating system has ______________ jitter than a soft real time operating system. a) equal b) more c) less d) none of the mentioned

c) less

38. The operating system keeps a small table containing information about all open files called ____________ a) file table b) directory table c) open-file table d) system table

c) open-file table

22. The main memory accommodates ____________ a) cpu b) user processes c) operating system d) all of the mentioned

c) operating system

33. The priority of a process will ______________ if the scheduler assigns it a static priority. a) depends on the operating system b) change c) remain unchanged d) none of the mentioned

c) remain unchanged

18. The FCFS algorithm is particularly troublesome for ____________ a) operating systems b) multiprocessor systems c) time sharing systems d) multiprogramming systems

c) time sharing systems

2. What is the main function of the command interpreter? a) to provide the interface between the API and application program b) to handle the files in the operating system c) to get and execute the next user-specified command d) none of the mentioned

c) to get and execute the next user-specified command

27. To obtain better memory utilization, dynamic loading is used. With dynamic loading, a routine is not loaded until it is called. For implementing dynamic loading ____________ a) special support from operating system is essential b) special support from hardware is required c) user programs can implement dynamic loading without any special support from hardware or operating system d) special support from both hardware and operating system is essential

c) user programs can implement dynamic loading without any special support from hardware or operating system

3. In Operating Systems, which of the following is/are CPU scheduling algorithms? a) Priority b) Round Robin c) Shortest Job First d) All of the mentioned

d) All of the mentioned

32. Which one of the following is a real time operating system? a) Windows CE b) RTLinux c) VxWorks d) All of the mentioned

d) All of the mentioned

34. What are the characteristics of Host based IDS? a) Logs are analysed to detect tails of intrusion b) The host operating system logs in the audit information c) Logs includes logins, file opens, and program executions d) All of the mentioned

d) All of the mentioned

15. When a process is in a "Blocked" state waiting for some I/O service. When the service is completed, it goes to the __________ a) Terminated state b) Suspended state c) Running state d) Ready state

d) Ready state

29. In real time operating system ____________ a) process scheduling can be done only once b) all processes have the same priority c) kernel is not required d) a task must be serviced by its deadline period

d) a task must be serviced by its deadline period

1. What is an operating system? a) interface between the hardware and application programs b) collection of programs that manages hardware resources c) system service provider to the application programs d) all of the mentioned

d) all of the mentioned

12. In operating system, each process has its own __________ a) open files b) pending alarms, signals, and signal handlers c) address space and global variables d) all of the mentioned

d) all of the mentioned

23. The operating system is responsible for? a) bad-block recovery b) booting from disk c) disk initialization d) all of the mentioned

d) all of the mentioned

7. Which one of the following errors will be handle by the operating system? a) lack of paper in printer b) connection failure in the network c) power failure d) all of the mentioned

d) all of the mentioned

26. The operating system maintains a ______ table that keeps track of how many frames have been allocated, how many are there, and how many are available. a) memory b) mapping c) page d) frame

d) frame

11. What does OS X has? a) monolithic kernel with modules b) microkernel c) monolithic kernel d) hybrid kernel

d) hybrid kernel

44. The two steps the operating system takes to use a disk to hold its files are _______ and ________ a) caching & logical formatting b) logical formatting & swap space creation c) swap space creation & caching d) partitioning & logical formatting

d) partitioning & logical formatting

20. A deadlock avoidance algorithm dynamically examines the __________ to ensure that a circular wait condition can never exist. a) operating system b) resources c) system storage state d) resource allocation state

d) resource allocation state

41. To recover from failures in the network operations _____________ information may be maintained. a) operating system b) ip address c) stateless d) state

d) state