McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Computer Science Engineering (CSE) .
| 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 | |
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