| 51. | Find the odd man out: |
| a. | tail |
| b. | cut |
| c. | wart |
| d. | sed |
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|
Answer: (c).wart
|
| 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
|
| 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
|
| 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
|
| 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
|
| 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
|
| 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
|
| 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
|
| 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
|
| 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
|
