All Free Software Engineering MCQs with Answers

• A. ls
• B. ls -1
• C. ls -x
• D. lc

Explanation: `ls -x` lists directory entries across the screen in multiple columns. `ls -1` deliberately places one filename on each line, so it does…

• A. Execute permission for the owner
• B. Write permission for others
• C. Read and write permission of groups
• D. All of the above

Explanation: The digits `6`, `5`, and `2` mean owner `rw-`, group `r-x`, and others `-w-`, respectively.

• A. C shell
• B. Korn shell
• C. Bourne shell
• D. Smith shell

Explanation: The Bourne shell, `sh`, was the original widely used Unix shell and became the foundation for many later shells.

• A. chmod u-x, go+r note
• B. chmod go+r, u+x note
• C. chmod g-x, uo+r note
• D. chmod go+x, u-x note

Explanation: `u-x` removes execute permission from the user, and `go+r` adds read permission for the group and others.

• A. lk
• B. ln
• C. cp
• D. tar

Explanation: The `ln` command creates hard or symbolic links between filenames. `cp` makes a separate copy, while `tar` packages files into an archive…

• A. find -mtime +365 | rm
• B. grep (/usr/*) - mtime + 365 | -ok rm
• C. find -name - mtime + 365 / - ok rm
• D. find /user/* \(-mtime + 365 - a - atime +365 \) - OK rm {} \;

Explanation: The find expression combines -mtime +365 and -atime +365, so both modification and access must be older than one year; -ok rm asks for…

• A. count p
• B. wc
• C. wcount
• D. countw

Explanation: wc, or word count, reports a file's number of lines, words, and characters, and commonly also its bytes.

• A. to move cursor left by one position
• B. to move cursor right by one position
• C. to move cursor down by one line
• D. to move cursor to the beginning of the line specified by the number

Explanation: In vi, placing a line number before G moves the cursor to that numbered line, so 24G moves to line 24.

• A. ic
• B. ai
• C. sm
• D. ts

Explanation: The vi setting ic means ignore case during pattern searches, so uppercase and lowercase letters are treated as equivalent.

• A. who | tee user.lst
• B. who > user.lst
• C. who >> user.lst
• D. who < user.lste

Explanation: tee sends the command's output to both standard output and the specified file, so who | tee user.lst displays the result while saving it.

• A. copy programs/wb misc/wbx
• B. cp programs/wb misc/wbx
• C. tar programs/wb misc/wbx
• D. copy a:programs/wb b:misc/wbx

Explanation: cp copies the source path programs/wb to the destination path misc/wbx.

• A. more
• B. pg
• C. cat
• D. lp

Explanation: pg displays text one page at a time and is traditionally associated with viewing a file in fixed screen-sized pages, such as 24 lines.

• A. s
• B. r
• C. w
• D. d

Explanation: Within the traditional mail command, s saves the current message to a separate file, normally followed by its filename.

• A. .exrc
• B. .profile
• C. .autoexec
• D. autoexec.bat

Explanation: The .profile file contains shell commands executed when a user logs in, such as environment-variable and path settings.

• A. pid
• B. du
• C. ps
• D. au

Explanation: ps displays information about active processes, including their process IDs, owners, and status.

• A. head - r
• B. tail
• C. eof
• D. bof

Explanation: `tail` displays the last part of a file, whereas `head` displays its beginning.

• A. write
• B. mail
• C. wall
• D. mesg

Explanation: `wall` broadcasts a message to all users currently logged in to the system.

• A. sort
• B. sh
• C. st
• D. sort -r

Explanation: `sort` arranges input lines in ascending lexicographic order by default, which is usually described as alphabetical order.

• A. logic
• B. profile
• C. shell
• D. erxc

Explanation: The shell is the command interpreter between the user and the UNIX kernel, accepting commands and launching programs.

• A. cd
• B. changedir
• C. chdir
• D. cdir

Explanation: `cd` changes the shell's current working directory. The other names are not the standard UNIX command used for this purpose.