Free Software Development Lifecycle MCQs with Answers

• A. rch
• B. R
• C. S
• D. j

Explanation: `j` is a vi movement command that moves the cursor down, not an input-mode command.

• A. more
• B. cat
• C. grep
• D. tee

Explanation: `tee` copies standard input to a file while also sending the same data to standard output, so it remains visible on the terminal.

• A. who am i
• B. i /4
• C. pwd
• D. which

Explanation: `who am i` displays the current user's login identity and related session information.

• A. 1
• B. 6
• C. 5
• D. 3

Explanation: Read permission is 4 and write permission is 2, so the owner's combined permission value is 4 + 2 = 6 in octal.

• A. chmod 167 note
• B. chmod u=rwx, g=rw, o=x note
• C. chmo a =761 note
• D. chmod 4=7, g=6,0 =1 note

Explanation: In `761`, the digits assign owner `7` as `rwx`, group `6` as `rw-`, and others `1` as `--x`.

• A. ls | wc
• B. ls -l | wc -l
• C. ls | wc -w
• D. ls | ws -c

Explanation: `ls` sends the directory entries to `wc`, and `wc -w` counts them as words.

• A. print
• B. prn
• C. pg
• D. lp

Explanation: `lp` sends a file to the system printer, whereas `print`, `prn`, and `pg` are not the standard Unix command for printing a file.

• A. which
• B. who
• C. who am i
• D. 1 /u

Explanation: `who` lists all users currently logged in, usually showing their terminals and login times.

• 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

Explanation: `cp programs/wb misc` copies `wb` into the `misc` directory while preserving its filename.

• A. cd
• B. cd ..
• C. cd/
• D. chdir

Explanation: In Unix, `..` denotes the parent directory, so `cd ..` moves one level upward. A bare `cd` normally takes the user to the home directory.

• A. s
• B. S
• C. a
• D. i

Explanation: In vi, `s` deletes the character under the cursor and enters insert mode, allowing any number of replacement characters.

• A. cat
• B. grep
• C. wc
• D. None of the above

Explanation: `cat`, `grep`, and `wc` can all act as Unix filters because they can read standard input and write standard output.

• A. to move the cursor to a matching delimiter, when a delimiters a parenthesis, a bracket, or a brace.
• B. to move the cursor to the upperleft corner of the screen
• C. to move the cursor backward to the beginning of a word
• D. to move the cursor to the first column in the current line

Explanation: In vi, `%` moves the cursor between matching delimiters such as parentheses, brackets, and braces.

• A. -4
• B. -f
• C. -1
• D. -2

Explanation: The `-f` option gives a fuller process listing, including the complete command-line information.

• A. $
• B. #
• C. :
• D. ;

Explanation: A semicolon separates commands so the shell executes them sequentially on the same command line.

• A. ls -l -d
• B. ls -l
• C. ls -x
• D. ls -F

Explanation: The `-d` option makes `ls` display the directory entry itself rather than listing the directory's contents, and `-l` shows its attributes…

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

Explanation: `sort` orders lines alphabetically by default, while the `-r` option reverses that order.

• A. chmod u + r, g + r, o - x letter
• B. chmod ugo = r letter
• C. chmod a - rw letter
• D. chmod go + r letter

Explanation: `ugo` refers to user, group, and others, and `=r` assigns read permission while removing other permissions.

• A. Bob Young
• B. Mark Eving
• C. Richard Stallman
• D. Linus Torvalds

Explanation: Linus Torvalds created the Linux kernel, which became the core of the Linux operating system.

• A. ls | ws - c
• B. ls | wc - w
• C. ls | wc - l
• D. ls | wc

Explanation: `ls` produces one directory entry per line in its normal output, and `wc -l` counts those lines.