Free Software Development Lifecycle MCQs with Answers

• A. x
• B. X
• C. dd
• D. D

Explanation: In vi command mode, `x` deletes the character at or beneath the cursor.

• A. 1024 bytes
• B. 2048 bytes
• C. 512 bytes
• D. 256 bytes

Explanation: Traditional Unix file systems use physical disk blocks of 512 bytes, although modern Unix-like systems may use different block sizes.

• A. erase
• B. delete
• C. rm
• D. dm

Explanation: The `rm` command removes files and, with suitable options, directories.

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

Explanation: `chmod ugo=r note` assigns read permission to the user, group, and others while removing write and execute permissions.

• A. mesg
• B. grep
• C. halt
• D. sleep

Explanation: `mesg` controls whether other users may send messages to a terminal, with `mesg n` restricting incoming messages.

• A. rename
• B. remove
• C. mv
• D. ren

Explanation: Unix uses `mv` both to move a file and to rename it when the destination is in the same directory or has a new name.

• A. group has read permission only
• B. other has read permission only
• C. owner has read permission only
• D. group has write permission only

Explanation: Unix permissions are grouped as owner, group, and others, in that order.

• A. ls -1
• B. ls -t
• C. ls -i
• D. ls -R

Explanation: The `-t` option sorts directory entries by modification time, showing the most recently modified files first.

• A. $!
• B. $#
• C. 0
• D. $*

Explanation: The special variable `$!` expands to the process ID of the most recently started background job.

• A. remove
• B. rm
• C. mv
• D. del

Explanation: `rm` is the standard Unix/Linux command for removing files. `mv` moves or renames a file, while `remove` and `del` are not the standard…

• A. ^pat
• B. $pat
• C. pat$
• D. pat^

Explanation: In grep regular expressions, `^` anchors a pattern to the beginning of a line, so `^pat` matches lines that start with `pat`.

• A. chmod go+r note
• B. chmod go+rw note
• C. chmod go-x note
• D. chmod go-r note

Explanation: In `chmod`, `go` selects the group and others classes, while `-r` removes read permission, making `chmod go-r note` the required command.

• A. nfsmount
• B. knfsd
• C. mount
• D. All of the above

Explanation: The `mount` command attaches a filesystem, including an NFS filesystem, to the directory tree; NFS is typically specified with a type or…

• A. $
• B. 3 dw
• C. 3 x
• D. 3 dd

Explanation: In vi, `dw` deletes one word, so `3dw` deletes three words from the cursor position.

• A. Linus Torvalds
• B. Richard Stallman
• C. Bob Young
• D. All of the above

Explanation: Richard Stallman founded the Free Software Foundation in 1985 to promote free software and related freedoms.

• A. del
• B. mv
• C. rm
• D. remove

Explanation: `rm` removes files in Unix/Linux systems. `mv` renames or moves a file, whereas `del` and `remove` are not the standard Unix command for…

• A. /etc/.profile
• B. /etc/.bashrc
• C. /etc/.log
• D. /etc/profile

Explanation: `/etc/profile` is read for system-wide shell initialization, so its settings apply by default to users with login shells.

• A. to exit status of ast command executed.
• B. to process number of the current shell
• C. to list the positional parameters
• D. to name the command being executed

Explanation: `$*` expands to all positional parameters supplied to the shell script or function, generally as one word when quoted.

• A. h
• B. k
• C. j
• D. i

Explanation: In vi command mode, `h` moves the cursor one position left. The commands `j` and `k` move down and up, while `i` enters insert mode.

• A. tee
• B. grep
• C. cat
• D. more

Explanation: `tee` copies standard input to a file while also sending the same data to standard output, so the output is both saved and displayed.