51. | Find the odd man out: |
a. | tail |
b. | cut |
c. | wart |
d. | sed |
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Answer: (c).wart
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52. | Which of the following changes permission to deny write permission to group and others? |
a. | Chmod go-w filex |
b. | Chmod go w filex |
c. | Chmod go=w filex |
d. | None of the above |
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Answer: (a).Chmod go-w filex
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53. | Which of the following OS treats hardware as a file system? |
a. | UNIX |
b. | DOS |
c. | Windows NT |
d. | None of the above |
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Answer: (a).UNIX
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54. | An example of a memory management system call in UNIX is: |
a. | fork |
b. | mmap |
c. | sigaction |
d. | execve |
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Answer: (b).mmap
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55. | An example of a directory found in most UNIX system is: |
a. | usr |
b. | waitpid |
c. | brk |
d. | unmap |
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Answer: (a).usr
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56. | The “nice” command is used in Unix: |
a. | to decrease the priority of a process |
b. | to increase the priority of a process |
c. | to get the highest priority |
d. | both a and b |
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Answer: (d).both a and b
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57. | Which of the following is not an Unix Command ? |
a. | Whoami |
b. | wc |
c. | ls |
d. | put |
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Answer: (d).put
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58. | A system call in Linux operating system to create a new child process, which is a copy of the parent process: |
a. | access |
b. | fork |
c. | flock |
d. | exec |
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Answer: (b).fork
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59. | The environment variable in Linux, that contain a list of directories the shell automatically recognizes. |
a. | $PATH |
b. | $ENV |
c. | $USER |
d. | $GREP |
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Answer: (a).$PATH
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60. | In Linux, the subdirectory that contains system configuration files including user passwords: |
a. | /boot |
b. | /usr |
c. | /etc |
d. | /proc |
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Answer: (c)./etc
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