All Free Software Engineering MCQs with Answers

• A. executable permission only
• B. write and executable permissions
• C. both read and executable permissions.
• D. both read and write permissions

Explanation: In a Unix permission triplet, the first position group belongs to the owner.

• A. > symbols
• B. >> symbols
• C. < symbols
• D. << symbols

Explanation: The >> redirection operator writes output at the end of an existing file, preserving its current contents.

• A. $!
• B. $$
• C. 0
• D. $*

Explanation: The special shell variable $$ expands to the process ID of the current shell. By contrast, $!

• A. [ijk]
• B. [!ijk]
• C. ?
• D. *

Explanation: The * wildcard matches zero or more characters, so it can match an empty string as well as a sequence of characters. The ?

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

Explanation: `rm` removes files from the filesystem. The other choices are not the standard Unix command for file removal.

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

Explanation: `mail`, `mesg`, and `write` are Unix communication commands, whereas `grep` searches text using pattern matching.

• A. rpcinfo
• B. serverinfo
• C. NFSinfo
• D. infserv

Explanation: `rpcinfo` queries RPC services and can show the services registered by an NFS server.

• A. Net.Net.Net.Node
• B. Net.Net.Node.Node
• C. Net.Node.Net.Node
• D. Net.Node.Node.Node

Explanation: A Class A IPv4 address uses 8 bits for the network portion and 24 bits for the host portion, represented as `Net.Node.Node.Node`.

• A. bzimage.img
• B. tar
• C. ghost
• D. mkkickstart

Explanation: Red Hat's Kickstart mechanism automates installation using a configuration file, and `mkkickstart` is the option associated with creating…

• A. Linux
• B. BSD
• C. UnixWare
• D. DOS

Explanation: Traditional Linux systems commonly used the DOS-style partition table, also known as the MBR partition table.

• A. cat emp[!0-9]
• B. more [emp][!0-9]
• C. cat emp[x-z]
• D. cat emp[a-z]

Explanation: In a shell glob, `[!0-9]` matches one character that is not a digit, so `cat emp[!0-9]` selects names beginning with `emp` and having a…

• A. chmod -R a+x progs
• B. chmod -R 222 progs
• C. chmod -1 a+x progs
• D. chmod -x a+x progs

Explanation: The `-R` option applies the change recursively, while `a+x` adds execute permission for the owner, group, and others.

• A. chmod ugo+r letter
• B. chmod ugo+rw letter
• C. chmod u+x letter
• D. chmod ugo+x letter

Explanation: `ugo+x` adds execute permission for the user, group, and others on `letter`. `u+x` would give execute permission only to the file owner.

• A. .exrc
• B. .profile
• C. lastlogin
• D. .mbox

Explanation: The Bourne shell reads `.profile` when a user logs in, allowing environment variables and startup settings to be established.

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

Explanation: Running `cd` without a directory argument changes to the current user's home directory.

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

Explanation: `write` sends an interactive message to another logged-in user and supports two-way communication.

• A. R
• B. v
• C. C
• D. u

Explanation: In the vi editor, capital `R` enters replace or overstrike mode, allowing existing characters to be replaced across a line.

• A. +
• B. -
• C. =
• D. %

Explanation: The `=` operator sets an exact permission set, so it is used for absolute assignment such as `chmod u=rw file`.

• A. who
• B. ls
• C. tty
• D. stty

Explanation: `tty` prints the device pathname of the terminal connected to the current session, such as `/dev/pts/0`.

• A. pg
• B. cat
• C. lp
• D. /p

Explanation: `pg` displays a file page by page, traditionally showing about 24 lines per screen on a standard terminal.