Basic Unix MCQ

27. What control character signals the end of the file ?

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28. Which of the following statements is not true regarding UNIX ?

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29. Which error will you see when an NFS client can no longer access mounted file system?

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30. The PID of a process is displayed by the command

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31. The file descriptor of stdin is

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32. What option of the sort filter would you use if you want to save the output on a disk file ?

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33. Which command enables you to concatenate files ?

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34. What is the number of fields in each line in /etc/passwd file?

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35. Which of the following is a responsibility of the system administrator?

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36. Which command is used for splitting a file horizontally?

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37. Which of the following statements is incorrect regarding the UNIX environment?

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38. How can a root user find the password of a user who has forgotten his password?

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39. Which of the following statements is incorrect regarding positional parameters ?

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40. What would be displayed on the screen if the pwd command is entered when the user is in /usr directory?

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41. A single command which lists all files in a directory, distinguishing between a directory, executable and symbolic link files is:

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42. Which wild-card matches one character ?

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43. Which option of the sort filter changes the output to reverse order ?

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44. Which of the following shells is typically used for guest logins and in secure systems ?

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45. Which command gives location of the first difference between two files ?

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46. Which command gives all differences between two files ?

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47.

 Consider the following file listing of file abc1 for a user abc
-rw-------        1        abc        student                10        jan        10:39        abc1
What inference would you make regarding the file access permissions ?

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48. Which of the following is the only filter?

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49. By which command a user can add a password for his login name?

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50. The executable file name for the Bourne shell is :

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51. Which file contains the commands that the system executes when a user logs in?

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52. Which option of the sort filter folds lower case characters to upper case ?

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53. The user passwords are kept in which file on most Unix systems?

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54. Which character would be used in the grep filter to specify a pattern which consists of any one of a set of characters?

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55. Which option of the grep filter prints out all those lines that do not match the pattern specified by the regular expression ?

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56. Which character of the grep filter specifies that the pattern preceding it must occur at the end of each line ?

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57. Which screen manipulation command sets the screen back to normal?

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58. You want to specifically search for the character [ . What character(s) would you use in the expression to achieve this ?

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59.

The command rm -r project

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60. Highlight the incorrect statement regarding the uniq command :

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61. By which screen manipulation command can you specify the coordinates for the cursor position ?

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62. You are writing a shell script.For a given condition, you want to terminate a loop. Which command will you use ?

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63. Which filter is used to copy the standard input to the standard output and also to a disk file ?

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64. Which command would you use if you want to display selective fields from a file ?

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65. Which file contains the commands run by all users at login?

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66. What is the command that can print lines of 1st file matching with 2nd file ?

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67. Which of the following is not a filter ?

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68. You want to declare a variable vs with the value hello. Which of the following declarations is correct ?

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69. What information does the who am i command display?

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70. UNIX is an example of :

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71. The number of arguments can be known by which variable ?

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72. What communication command allows a user to communicate with another user logged on by splitting the screen and providing two way communication ?

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73. You have two variables, v1 and v2. You want to assign the value of v2 to v1.Which of the following declarations is correct ?

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74. Which command is used to run a command at a specified time ?

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75. In which of the following high level languages most of the UNIX is written?

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76. What is the number of standard file pointers in UNIX?

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77. What is the default UNIX prompt?

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78. Which option of the uniq command would you use to display lines with only one occurence?

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79. Which command invokes a text editor ?

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80. What is the file descriptor for the standard output file ?

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81. Which of the following statements is incorrect regarding variables?

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82. You want to search for the pattern "Newa" or "Newb" or "Newc". Which regular expression will you use with the grep command ?

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83. Which of the following commands can be used to view the calendar of April 2007?

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84. In UNIX , shell is a program which :

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85. UNIX offers the following benefits :

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86. Study the following statements and select the incorrect one :

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87. What is the correct command to delete all files with two character file-names from the directory /user/group2 ?

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88. Who can change the password of a user account?

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89. Which of the following statements is incorrect ?

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90. Which command would make the scope of a shell variable global to the subshells ?

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91. Pipes is/are :

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92. Using which command can you move to a different directory?

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93. Which command will delete a directory only if it is empty ?

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94. Which command will you use to see your current group?

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95. Which of the following characters can be used to run multiple commands on a single line?

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96. Which of the following is incorrect about the restrictions imposed by the restricted shell ?

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97. With regard to UNIX, a process is :

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98. What is the file descriptor for the standard error file ?

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99. Mounting a file system means :

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100. Which command identifies the current working directory ?

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101. Which of the following commands can be used to add the read and write permissions to the user and group classes of a file named abc?

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102. What is the default standard error file ?

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103. Which command compresses a file?

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104. Which command will symbolically link two files in a directory?

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105. The wc filter :

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106. Which filter will you use to translate a set of charaters to another ?

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107. Which option used along with the find command allows one to perform operations on the files that are located by the find command ?

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108. Which of the following files is configured for login name, login directory and login shell variables?

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109. Suppose you have a file named trans and you want to display fields two to four. Which of the following commands will you use ?

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110.

Consider the following command
        cat re*
Which of the following files will not be displayed by this command ?

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111. Which screen manipulation command sets the screen to reverse video?

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112. Which of the following commands can be used to communicate directly with other users by sending messages?

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113. Which type of users can be associated with each file in UNIX ?

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114. Which of the following statements regarding file naming is incorrect?

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115. Which UNIX command provides the type of information contained in a particular file ?

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116. You want to make a new directory.What command will you use ?

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117. You want to read through the reference manual.What command will you use ?

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118. Which option of the sort filter performs a numeric sort ?

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119. Point out the incorrect statement regarding standard input , output and error :

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120. Which option of the uniq command would you use to display only those lines which have a multiple occurrence ?

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121. Which variable will display the list of the positional parameters?

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122. Which special variable will display the exit status of the last executed command in Bourne or Korn shell?

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123.

The command ls | more displays a list of :

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124.

The command rmdir c-prog   

will not work if :

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125. Which option used along with find prompts the user for confirmation before any operation is performed on a file ?

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126. Which of the following commands can be used to change group ownership of a file/directory?

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127. The mv command :

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128. Which variable contains the system prompt ?

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129. What is the exit code of a successful command ?

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130. What will be the result of command '' rm -r directory/* ''?

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131. Which of the following locations store the information about the currently installed Software on a local system?

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132. The chmod command :

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133. Which command gives information about space being used by files and directories ?

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134. The main objective of a time-sharing operating System like UNIX is to :

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135. Which command will you use to count the number of words in a file?

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136. Which keystroke combination sends or signals an interrupt request to a process ?

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137.

The file oldies-goldies has the details of the sale of books.The records are sorted on the names of the authors and are as follows 

        Alexandre Dumas

        Alexandre Dumas

        Alexandre Dumas

        Gerald Durrell

        Giovanni Guareschi

        Giovanni Guareschi

        James Herriot

        Louisa May Alcott

        Louisa May Alcott

        Louisa May Alcott

Based on the above information, what will be the output of the command

        uniq -u oldies-goldies ?

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138. To change the flog file permissions so that others besides you could neither read nor write to it, you do:

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139. True or False: Multiple usernames on Unix are allowed to have the same UID.

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140. When you check a file's permissions, and there's an "S" in the place of "x" in the owner permissions section of the ls command, it means that the:

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141. How do you determine the runlevel of the running system?

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142. chmod allows you to specify permissions for a file using octal numbers. 4000 permission is:

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143. To set a file so that anybody can read it but only root can modify it without changing the file's owner, you use chmod's octal permissions of:

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144. If your umask is 007 it means that default files are created with the permissions:

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145. Changing a file's permissions...

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146. Which of the following would you use to set yourself as the superuser in a secure way?

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147. Which of the following is not contained in the inode structure?

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148. If FFF is a file, the command 'touch FFF' will:

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149. In Unix, a filename cannot have the following character:

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150. You inspect the last access time (atime) instead of the last modification time (mtime) in ls output by using the following switch to ls:

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151. A user reports a problem. In order to gain access to his account in the most secure and non obtrusive way, you...

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152. How would you print the content of the file in a reverse?

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153. If you use the command sequence: echo "hello">file; ln file newfile; rm file; What will happen when you run: cat newfile

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154. In an ls listing, 'l' 's' and '-' indicate:

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155. When you first log in to a Unix system, the login program performs various security measures. Which is not one of these security measures?

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156. To display or set your terminal characteristics, you use the command:

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157. The superuser can:

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158. What is the default maximum number of open files a user can have?

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159. To list the current users logged on to the system you use:

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160. How does Unix maintain its time clock?

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161. To be run by the shell, a shell script needs the following permission(s):

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162. When you execute the command 'cp . newdir', you...

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163. The command that would append the output from the encrypter to the current contents of the file private and read in the contents of the file top_secret, is:

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164. What is the primary difference between binaries located in /bin and /sbin versus /usr/bin and /usr/sbin?

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165. How to retrieve the GECOS information of the user 'sbz' ?

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166. Which of the following is NOT used as a wild-card in the shell?

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167. What will the following command result in on a SystemV host?: ps -ef | grep "[/]sbin/init"

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168. The whereis command helps you to locate...

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169. Which of the following find commands is correct?

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170. What happens to a process accessing a file if you delete the file?

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171. A password security feature of Unix allows N to set an expiration date on users' passwords:

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172. Passwords may contain:

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173. Listing directory trees recursively, in ls you use the flag:

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174. If you execute the following, which users can read the file? chmod 060 file

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175. If you wish to change both owner and group of a file in a two-step process, use these commands:

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176. To know which tty you are on, you use the command:

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177. What does SNMP stand for?

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178. The standard shell of Unix System V is:

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179. In Unix, ping works on which protocol?

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180. Can a Unix filename contain a space?

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181. To run network services on "trusted" (numbered below 1024) ports, your effective UID should be:

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182. What will be the output of the command: basename /var/tmp/myfile.txt

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183. The command 'chmod -x /tmp/tmp.tmp' will:

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184. A good account name for the default user that will need to carry out only non-privileged operations is:

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185. When searching the path, if there are two commands with the same name:

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186. You instruct a program to take its input from a previously prepared text file using the input redirection character:

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187. chmod allows you to specify permissions for a file using octal numbers. 1000 permission is:

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188. To show the grand total, in kilobytes, of all directories (to which you have access) at or below the current point in the file system, you use:

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189. The cal command...

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190. To channel the output of one command or program into the input of another, you use:

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191. If you use the command 'ls -F', a string that ends in @ is a:

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192. If you wanted to have multiple outputs for a particular command or script which standard base utility would you use?

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193. The numeric permission equivalent to '-rw-rw----' is:

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194. Which command is used to make an archive of a directory?

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195. After a fork, the new process...

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196. When files are recovered after any sort of problem or failure, if the kernel cannot ascertain the proper location in the file system, the recovered file is placed in the directory:

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197. A Unix user can belong to:

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198. Which of the following is NOT a scripting language in Unix?

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199. If your account is named myuser, and you changed your password, one way to test that you type the new password correctly is:

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200. The Bourne shell has one file in your home directory that it reads when you log in; this file is:

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201. To change the file flog so people who don't belong in your group can't read it, you use the command:

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202. To list only the account name associated with the current login, you use the command:

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203. To refer to the parent of the current working directory, you use:

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204. Once you delete a file in Unix:

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205. Unix uses the N character to separate the directories in the pathname. N is:

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206. To list directories rather than their contents, in ls you use the flag:

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207. Which command is used to send and receive mail in Unix?

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208. To refer to your home directory, you use:

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209. To give everybody in your group write permission to the file flog, you do:

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210. To specify an absolute path, the string for the path starts with:

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211. To temporarily change your UID, you use the command:

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212. On Unix, you copy a file using the command:

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213. Unix has the following file/directory permissions:

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214. If your (effective) process UID is 0, you can:

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215. You display the contents of a text file on the screen using the command: