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Linux Operating System Management

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“Linux OS Management frequently Asked Questions by expert members with experience in Linux Operating System Management. These questions and answers will help you strengthen your technical skills, prepare for the new job test and quickly revise the concepts”

99 Linux Operating System Management Questions And Answers

61⟩ The login shell is a) The shell program that runs when the user logs in b) The shell program that authenticates the user while logging in c) Common shell for all the users that belong to the same group d) None of the above

a) The shell program that runs when the user logs in

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62⟩ By default, a Linux user falls under which group? a) staff b) others c) same as userid (UPG) d) system

c) same as userid (UPG)

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63⟩ Which of the following command can be used to change the user password? a) User can't change the password b) passwd c) passd d) pwd

b) passwd

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64⟩ What is a context switch? a) Kernel switches from executing one process to another. b) Process switches from kernel mode to user mode. c) Process switches from user mode to kernel mode. d) None of the above

a) Kernel switches from executing one process to another.

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65⟩ What is the default maximum number of processes that can exist in Linux? a) 32768 b) 1024 c) 4096 d) unlimited

a) 32768

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66⟩ Which option of rmdir command will remove all directories a, b, c if path is a/b/c a) -b b) -o c) -p d) -t

c) -p

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67⟩ How do you get parent process identification number? a) waitpid b) getpid() c) getppid() d) parentid()

c) getppid()

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68⟩ Pid of init process a) 0 b) 1 c) 32767 d) none of the above

b) 1

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69⟩ How many times printf() will be executed in the below mentioned program? main() { int i; for (i = 0; i < 4; i++) fork(); printf("my pid = %dn", getpid()); } a) 4 b) 8 c) 16 d) 32

c) 16

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70⟩ What is output of the following program? int main() { fork(); fork(); fork(); if (wait(0) == -1) printf("leaf childn"); } a) "leaf child" will be printed 1 times b) "leaf child" will be printed 3 times c) "leaf child" will be printed 4 times d) "leaf child" will be printed 8 times

c) "leaf child" will be printed 4 times

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71⟩ What is the output of the below code? void exit_handler1(); void exit_handler2(); int main() { int pid; atexit(exit_handler1); atexit(exit_handler2); pid = fork(); if(pid == 0) { _exit(0); } else { sleep(2); exit(0); } return 0; } a) Only child executes the exit_handler 1 and 2. b) Only parent executes the exit_handler 1 and 2. c) Both parent and child executes the exit_handler 1 and 2. d) Neither parent nor child executes the exit_handler 1 and 2.

b) Only parent executes the exit_handler 1 and 2.

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72⟩ The maximum time slice that can be given to a process in Linux (where tick is 10ms) is a) 150ms b) 10ms c) 300 ms d) 600ms

d) 600ms

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73⟩ The process which terminates before the parent process exits becomes a) Zombie b) Orphan c) Child d) None of the above

a) Zombie

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74⟩ Nice can be used by an ordinary process to a) increase the priority of a process b) decrease the priority of a process c) increase or decrease the priority of a process

b) decrease the priority of a process

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75⟩ Which represents the user home directory a) / b) . c) .. d) ~

d) ~

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76⟩ In Linux kernel-2.6 Real time priority ranges from a) 0 to 99 b) 0 to 139 c) -20 to 19 d) 100 to 139

a) 0 to 99

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77⟩ Solaris system class priority is a) 0-59 b) 60-99 c) 100-159 d) 160-169

b) 60-99

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78⟩ If a file is removed in Unix using 'rm' then a) The file can be recovered by a normal user b) The file cannot be recovered by a user c) The file can be fully recovered provided the sytem is not rebooted d) The file will be moved to /lost+found directory and can be recovered only by administrator's intervention

b) The file cannot be recovered by a user

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79⟩ Solaris real time class priority is a) 0-59 b) 60-99 c) 100-159 d) 160-169

c) 100-159

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80⟩ What command is used to copy files and directories? a) copy b) cp c) rn d) cpy

b) cp

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Linux Operating System Management

Home Operating System Linux Linux Operating System Management

99 Linux Operating System Management Questions And Answers

61⟩ The login shell is a) The shell program that runs when the user logs in b) The shell program that authenticates the user while logging in c) Common shell for all the users that belong to the same group d) None of the above

62⟩ By default, a Linux user falls under which group? a) staff b) others c) same as userid (UPG) d) system

63⟩ Which of the following command can be used to change the user password? a) User can't change the password b) passwd c) passd d) pwd

64⟩ What is a context switch? a) Kernel switches from executing one process to another. b) Process switches from kernel mode to user mode. c) Process switches from user mode to kernel mode. d) None of the above

65⟩ What is the default maximum number of processes that can exist in Linux? a) 32768 b) 1024 c) 4096 d) unlimited

66⟩ Which option of rmdir command will remove all directories a, b, c if path is a/b/c a) -b b) -o c) -p d) -t

67⟩ How do you get parent process identification number? a) waitpid b) getpid() c) getppid() d) parentid()

68⟩ Pid of init process a) 0 b) 1 c) 32767 d) none of the above

69⟩ How many times printf() will be executed in the below mentioned program? main() { int i; for (i = 0; i < 4; i++) fork(); printf("my pid = %dn", getpid()); } a) 4 b) 8 c) 16 d) 32

70⟩ What is output of the following program? int main() { fork(); fork(); fork(); if (wait(0) == -1) printf("leaf childn"); } a) "leaf child" will be printed 1 times b) "leaf child" will be printed 3 times c) "leaf child" will be printed 4 times d) "leaf child" will be printed 8 times

72⟩ The maximum time slice that can be given to a process in Linux (where tick is 10ms) is a) 150ms b) 10ms c) 300 ms d) 600ms

73⟩ The process which terminates before the parent process exits becomes a) Zombie b) Orphan c) Child d) None of the above

74⟩ Nice can be used by an ordinary process to a) increase the priority of a process b) decrease the priority of a process c) increase or decrease the priority of a process

75⟩ Which represents the user home directory a) / b) . c) .. d) ~

76⟩ In Linux kernel-2.6 Real time priority ranges from a) 0 to 99 b) 0 to 139 c) -20 to 19 d) 100 to 139

77⟩ Solaris system class priority is a) 0-59 b) 60-99 c) 100-159 d) 160-169

79⟩ Solaris real time class priority is a) 0-59 b) 60-99 c) 100-159 d) 160-169

80⟩ What command is used to copy files and directories? a) copy b) cp c) rn d) cpy

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