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101. |
Which command is used to extract specific columns from the file? |
A. | cut |
B. | grep |
C. | past |
D. | cat |
Answer» A. cut |
102. |
Which command is used with vi editor to move the cursor to the left? |
A. | i |
B. | k |
C. | j |
D. | h |
Answer» D. h |
103. |
Which command is used to create a directory? |
A. | crdir |
B. | mkdir |
C. | md |
D. | cr |
Answer» B. mkdir |
104. |
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 file |
D. | none of the above |
Answer» A. chmod go-w filex |
105. |
Which command is used with vi editor to delete a single character? |
A. | z |
B. | y |
C. | a |
D. | x |
Answer» D. x |
106. |
The tar command in UNIX |
A. | used to create compressed archives of directories and files |
B. | used to extract directories and files from an archives |
C. | both a and b |
D. | none of the above |
Answer» C. both a and b |
107. |
Which command is used to sort the lines of data in a file in reverse order |
A. | sort |
B. | sh |
C. | st |
D. | sort -r |
Answer» D. sort -r |
108. |
Which of the following commands is used to rename a file? |
A. | rename |
B. | mv |
C. | remove |
D. | ren |
Answer» B. mv |
109. |
Which command is used to display a file contents in octal form? |
A. | cd |
B. | of |
C. | od |
D. | oct |
Answer» C. od |
110. |
Which of the following commands is used to count the total number of lines,words and characters contained in a file? |
A. | count p |
B. | wcount |
C. | wc |
D. | count w |
Answer» C. wc |
111. |
The cc command makes a total of |
A. | 1 pass |
B. | 2 pass |
C. | 4 pass |
D. | 5 pass |
Answer» D. 5 pass |
112. |
Which of the following commands is used for an automatic remainder service? |
A. | write |
B. | calender |
C. | |
D. | mesg |
Answer» B. calender |
113. |
The Unix command used to find out the number of characters in a file is |
A. | nc |
B. | wc |
C. | chcnt |
D. | c |
Answer» B. wc |
114. |
In a system ,if 5 people are currently using vi editor ,then the number of corresponding processes will be |
A. | 1 |
B. | 5 |
C. | 3 |
D. | 0 |
Answer» B. 5 |
115. |
Which set option is used with vi editor to display line numbers on screen? |
A. | nm |
B. | nu |
C. | ic |
D. | li |
Answer» B. nu |
116. |
Which command will be used with vi editor to move back to the beginning of a word? |
A. | b |
B. | e |
C. | a |
D. | w |
Answer» A. b |
117. |
Which of the following are not system calls? |
A. | chmod |
B. | open |
C. | lseek |
D. | getc |
Answer» D. getc |
118. |
The advantage of binary files over text files is that |
A. | it is compact |
B. | it can be accessed faster |
C. | many commands assume the named file to be a binary file |
D. | they are more reliable |
Answer» D. they are more reliable |
119. |
The cat command is used to |
A. | print a file |
B. | display a file |
C. | capture a file |
D. | copy a file |
Answer» B. display a file |
120. |
Command compares two files byte by byte and displays the first mismatch. |
A. | cmp |
B. | comp |
C. | cmap |
D. | none of these |
Answer» A. cmp |
121. |
When the read system call encounters EOF ,it returns |
A. | some positive integer |
B. | some negative integer |
C. | 0 |
D. | -1 |
Answer» C. 0 |
122. |
Which of the following system calls,does not return control to the calling point, on termination? |
A. | fork |
B. | exec |
C. | ioct1 |
D. | longjmp |
Answer» B. exec |
123. |
Which command is used to display the characteristics of a process? |
A. | pid |
B. | ps |
C. | du |
D. | au |
Answer» D. au |
124. |
Which command is used to display and create files? |
A. | cat |
B. | ed |
C. | vi |
D. | lyrix |
Answer» A. cat |
125. |
Files that can store data in the same format as used in program are called |
A. | binary files |
B. | source file |
C. | text file |
D. | core |
Answer» A. binary files |
126. |
The file that stores an integer as a sequence of characters is a |
A. | text file |
B. | data file |
C. | binary file |
D. | core |
Answer» A. text file |
127. |
Which is the earliest and most widely used shell that came with the UNIX system? |
A. | c shell |
B. | korn shell |
C. | bourne shell |
D. | smith shell |
Answer» C. bourne shell |
128. |
System call mknod creates a |
A. | new file |
B. | new directory |
C. | new binary file |
D. | none of these |
Answer» B. new directory |
129. |
A pipe a mechanism that allow a stream of data between to be passed between…….. |
A. | reader and writer process |
B. | reader process |
C. | writer process |
D. | none of these |
Answer» A. reader and writer process |
130. |
Which command is used to display the top of the file? |
A. | cat |
B. | head |
C. | more |
D. | grep |
Answer» B. head |
131. |
Which of the following keys is used to replace a single character with new text? |
A. | s |
B. | s |
C. | r |
D. | c |
Answer» B. s |
132. |
Which command sends the word count of the file infile to the newfile. |
A. | wc infile >newfile |
B. | wc <infile >newfile |
C. | wc infile - newfile |
D. | wc infile | newfile |
Answer» A. wc infile >newfile |
133. |
Which command is used to remove the read permission of the file 'note' from both the group and others? |
A. | chmod go+r note |
B. | chmod go+rw note |
C. | chmod go-x note |
D. | chmod go-r, 4-x note |
Answer» D. chmod go-r, 4-x note |
134. |
Which of the following commands is used to display the directory attributes rather than its contents? |
A. | ls -1 -d |
B. | ls -1 |
C. | ls -x |
D. | ls -f |
Answer» A. ls -1 -d |
135. |
Which of the following files will displayed by this command cat *ch* |
A. | patch |
B. | catch |
C. | .ch |
D. | all of the above |
Answer» D. all of the above |
136. |
If you are to use [Control-c] as the interrupt key instead of [Del], then you will have to use |
A. | tty ^c |
B. | stty intr \\^c |
C. | stty echoe |
D. | stty echo \\^a |
Answer» B. stty intr \\^c |
137. |
Which of the following keys is used to move the cursor to the end of the paragraph. |
A. | } |
B. | { |
C. | | |
D. | $ |
Answer» A. } |
138. |
Which command is used to concatenate all files beginning with the string 'emp' and followed by a non-numeric characters? |
A. | cat emp[!0-9] |
B. | more [emp][!0-9] |
C. | cat emp[x-z] |
D. | cat emp[a-z] |
Answer» A. cat emp[!0-9] |
139. |
The command which transcribes the standard input to the standard output and also makes a copy of the same in a file is |
A. | tee |
B. | tr |
C. | sort |
D. | grep |
Answer» A. tee |
140. |
Which symbol is used to separate more than one command in the same command line? |
A. | $ |
B. | # |
C. | : |
D. | ; |
Answer» D. ; |
141. |
The agency that sits between the user and the UNIX system is called the |
A. | logic |
B. | profile |
C. | shell |
D. | erxc |
Answer» C. shell |
142. |
Which of the following commands is used to update access and modification times of a file? |
A. | grep |
B. | wc |
C. | touch |
D. | cat |
Answer» C. touch |
143. |
Which command is used to count just the number of characters in a file? |
A. | wc - 1 |
B. | wc -c |
C. | wc -w |
D. | wc -r |
Answer» B. wc -c |
144. |
Which of the following commands is used to list contents of directories? |
A. | ls |
B. | lp |
C. | dir |
D. | tar |
Answer» A. ls |
145. |
In vi editor, forward search is performed using the command. |
A. | :pat |
B. | :pat |
C. | /pat |
D. | all of the above |
Answer» D. all of the above |
146. |
Which of the following special shell variables is used to process number of the last background job? |
A. | $! |
B. | $# |
C. | 0 |
D. | $* |
Answer» A. $! |
147. |
Which option will be used with ps command to slow the entire command line of the process being run? |
A. | -4 |
B. | -f |
C. | -1 |
D. | -4 |
Answer» B. -f |
148. |
Which of the following command addresses all users who are currently hooked on? |
A. | write |
B. | |
C. | wall |
D. | mesg |
Answer» C. wall |
149. |
Which of the following directories contain all the Ales created by a user, including his login directory? |
A. | /tmp |
B. | /etc |
C. | /usr |
D. | /dev |
Answer» C. /usr |
150. |
Which of the following commands is used to obtain a list of all files by modification time? |
A. | ls -1 |
B. | ls -t |
C. | ls -i |
D. | ls -r |
Answer» B. ls -t |
151. |
Which command is used to display the characteristics of a process? |
A. | pid |
B. | du |
C. | ps |
D. | au |
Answer» C. ps |
152. |
The filed separator in cut command is specified with |
A. | -a option |
B. | -d option |
C. | -r option |
D. | -x option |
Answer» B. -d option |
153. |
Which option will be used with touch command to change the access time? |
A. | -a |
B. | -b |
C. | -t |
D. | -h |
Answer» A. -a |
154. |
Which command is used to make all files and sub-directories in the directory (progs) executable by all users? |
A. | chmod -r a+x progs |
B. | chmod -r 222 progs |
C. | chmod -1 a+x progs |
D. | chmod -x a+x progs |
Answer» A. chmod -r a+x progs |
155. |
The second set of the three permissions (r-) indicates that |
A. | group has read permission only |
B. | other has read permission only |
C. | owner has read permission only |
D. | group has write permission only |
Answer» A. group has read permission only |
156. |
Which column contains all details of the permissions of a file when you issue the ls - l command? |
A. | second |
B. | fourth |
C. | third |
D. | first |
Answer» D. first |
157. |
Which of the following commands is used to display your working directory? |
A. | second |
B. | fourth |
C. | third |
D. | first |
Answer» C. third |
158. |
While working with mail command, which command is used to save mail i a separate file? |
A. | s |
B. | r |
C. | w |
D. | d |
Answer» A. s |
159. |
Which command is used to terminate a process? |
A. | shutdown |
B. | haltsys |
C. | cancel |
D. | kill |
Answer» D. kill |
160. |
The cp command uses: |
A. | standard input file |
B. | standard output file |
C. | both input and output file |
D. | neither standard input nor standard output file |
Answer» D. neither standard input nor standard output file |
161. |
Which command is used to print a file? |
A. | |
B. | prn |
C. | pg |
D. | lp |
Answer» D. lp |
162. |
Which command is used to list out all the hidden files along with the other files? |
A. | ls -l |
B. | ls -x |
C. | ls -f |
D. | ls -a |
Answer» D. ls -a |
163. |
Which command is used with vi editor to search a pattern in the forward direction? |
A. | / |
B. | ? |
C. | // |
D. | ?? |
Answer» A. / |
164. |
The command to count the number of files in the current directory by using pipes, is |
A. | ls | wc |
B. | ls -l | ws -l |
C. | ls | wc -w |
D. | ls | ws -c |
Answer» C. ls | wc -w |
165. |
Which of the following commands is used to get directory one level up? |
A. | cd |
B. | cd .. |
C. | cd/ |
D. | chdir |
Answer» B. cd .. |
166. |
Which of the following commands is used to count the total number of lines, words, and characters contained in a file. |
A. | count p |
B. | wc |
C. | wcount |
D. | countw |
Answer» B. wc |
167. |
Which command is used to delete all files in the current directory as well as all files and sub-directories in its subdirectories? |
A. | rm * |
B. | rm -r * |
C. | rm all |
D. | rm *.* |
Answer» B. rm -r * |
168. |
Which of the following commands is used to change the working directory? |
A. | cd |
B. | changedir |
C. | chdir |
D. | cdir |
Answer» A. cd |
169. |
Services provided by kernel are……… |
A. | controlling execution of process |
B. | scheduling processes |
C. | allocating main memory for an executing process |
D. | all of these |
Answer» D. all of these |
170. |
The shell acts as an interface between the ……….. |
A. | user and kernel |
B. | user and operating system |
C. | kernel and operating system |
D. | none of these |
Answer» A. user and kernel |
171. |
When a process executes a system call, the execution mode of the process changes from ……….. |
A. | kernel mode to user mode |
B. | user mode to kernel mode |
C. | user mode to operating system mode |
D. | none of these |
Answer» B. user mode to kernel mode |
172. |
when the kernel services an intrrupt, it blocks out low priority interrupts but……….. |
A. | services middle priority interrupt |
B. | services higher priority interrupts |
C. | both a and b |
D. | none of these |
Answer» B. services higher priority interrupts |
173. |
The commonly used UNIX commands like date, ls, cat, etc. are stored in……….. |
A. | /dev directory |
B. | /bin and /usr/bin directories |
C. | /tmp directory |
D. | /unix directory |
Answer» B. /bin and /usr/bin directories |
174. |
Which of the following commands is used to summarize the disk usage? |
A. | chkdsk |
B. | fdisk |
C. | du |
D. | disk |
Answer» C. du |
175. |
Which command is used to sort the lines of data in a file in alphabetical order? |
A. | sort |
B. | sh |
C. | st |
D. | sort -r |
Answer» A. sort |
176. |
If a file has read and write permissions for the owner, then the octal representation of the permissions will be |
A. | 1 |
B. | 6 |
C. | 5 |
D. | 3 |
Answer» B. 6 |
177. |
Which command is used to copy a file wb with the same name from the programs directory to the misc directory? |
A. | copy programs/wb misc/wb |
B. | cp programs/wb misc |
C. | tar programs/wb misc/wb |
D. | copy a:programs/wb b:misc/wb |
Answer» B. cp programs/wb misc |
178. |
The seventh field of /etc/password is…………. |
A. | password |
B. | login |
C. | shell |
D. | home |
Answer» C. shell |
179. |
Which command is used to display the end of the file? |
A. | head - r |
B. | tail |
C. | eof |
D. | bof |
Answer» B. tail |
180. |
The ls -l command tells |
A. | who the owner of the file is |
B. | the name of the group owner of the file |
C. | how large the file is and when the file was last modified. |
D. | all of the above |
Answer» D. all of the above |
181. |
Which option will be used with disk free command to include the total amount of disk space in the file system? |
A. | -t |
B. | -tt |
C. | -4 |
D. | -i |
Answer» A. -t |
182. |
Which command is used to set the three permissions for all the three categories of users of a file? |
A. | chgrp |
B. | chown |
C. | chmod |
D. | chusr |
Answer» C. chmod |
183. |
Which of the following commands can be used to get information about yourself? |
A. | who am i |
B. | i /4 |
C. | pwd |
D. | which |
Answer» A. who am i |
184. |
Which of the following commands can be used to get information about all users who are currently logged into the system? |
A. | which |
B. | who |
C. | who am i |
D. | 1 /u |
Answer» B. who |
185. |
Which of the following keys is used to overstrike a whole line? |
A. | r |
B. | v |
C. | c |
D. | u |
Answer» A. r |
186. |
Which command is used to locate all the .profile files in the system? |
A. | ls profile |
B. | find /-name profile print |
C. | cd /.profile |
D. | l -u .profile |
Answer» B. find /-name profile print |
187. |
The File that contains a set of instructions which are performed when a user logs in, is |
A. | .exrc |
B. | .profile |
C. | .autoexec |
D. | autoexec.bat |
Answer» B. .profile |
188. |
The octal representation 652 indicates |
A. | execute permission for the owner |
B. | write permission for others |
C. | read and write permission of groups |
D. | all of the above |
Answer» B. write permission for others |
189. |
Which of the following command is used to count just the number of lines contained in a file? |
A. | wc -l |
B. | wc -c |
C. | wc -w |
D. | wc -r |
Answer» A. wc -l |
190. |
Which command is used to move all files to the bin sub-directory of the parent directory? |
A. | mv *.* /bin/ |
B. | mv * /bin/* |
C. | mv * ../bin |
D. | mv * ../bin *.* |
Answer» C. mv * ../bin |
191. |
Which command is used to save the standard output in a file, as well as display it on the terminal? |
A. | more |
B. | cat |
C. | grep |
D. | tee |
Answer» D. tee |
192. |
Which of the following commands is used to copy directory structures in and out |
A. | cp |
B. | cpio |
C. | cp - p |
D. | copy |
Answer» B. cpio |
193. |
Which command allows you to view your file 24 lines at a time? |
A. | more |
B. | pg |
C. | cat |
D. | lp |
Answer» B. pg |
194. |
Which of the following special shell variables is used to process number of the current shell? |
A. | $! |
B. | $$ |
C. | 0 |
D. | $* |
Answer» B. $$ |
195. |
Which option is used with cmp command to give a detailed list of the byte number and the differing bytes in octal for each character that differs in both the files? |
A. | -l |
B. | -d |
C. | -r |
D. | -b |
Answer» A. -l |
196. |
Which command is used with vi editor scroll half page backward? |
A. | [control-d] |
B. | [control - u] |
C. | [control-c] |
D. | [control -p] |
Answer» B. [control - u] |
197. |
Which command is used with vi editor to move cursor forward to first occurrence of character 'ch' in the current line? |
A. | tch |
B. | fch |
C. | rch |
D. | ech |
Answer» B. fch |
198. |
Which of the following keys is used to delete the character beneath the cursor? |
A. | x |
B. | x |
C. | dd |
D. | d |
Answer» A. x |
199. |
Which command is used to assign only read permission to all three categories of the file 'note'? |
A. | chmod go+r note |
B. | chmod a-rw |
C. | chmod ugo=r note |
D. | chmod u+r,g+r,o x note |
Answer» C. chmod ugo=r note |
200. |
Which command will be used with vi editor to append text at end of line? |
A. | a |
B. | a |
C. | i |
D. | i |
Answer» A. a |
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