All Free Software Engineering MCQs with Answers

• A. chmod 761 note
• B. chmod 671 note
• C. chmod 167 note
• D. chmod 4=rwx, g=rw note

Explanation: In numeric permissions, 7 means read, write, and execute; 6 means read and write; and 1 means execute only.

• A. cat
• B. head
• C. more
• D. grep

Explanation: `head` displays the beginning, or top portion, of a file. `tail` is its counterpart for the end of a file, while `grep` searches for…

• A. -1
• B. -i
• C. -x
• D. -R

Explanation: The `-R` option makes `chmod` operate recursively on a directory and its contents, including subdirectories.

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

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

• A. shutdown
• B. haltsys
• C. cancel
• D. kill

Explanation: The `kill` command sends a signal to a process, including the termination signal.

• A. /boot/lilo.conf
• B. /etc/conf.modules
• C. /etc/named.boot
• D. /etc/lilo.conf

Explanation: On traditional Linux systems using LILO, `/etc/lilo.conf` contains the kernel image and boot-entry configuration that must be updated…

• A. grep
• B. wc
• C. touch
• D. cat

Explanation: `touch` updates a file's access and modification timestamps, creating the file if it does not already exist.

• A. 0
• B. 755
• C. 744
• D. 555

Explanation: Permissions are written as owner, group, and others: `7` gives the owner read, write, and execute, while `5` gives each remaining class…

• A. mkfs
• B. fdisk
• C. fsck
• D. mount

Explanation: `fdisk` creates and modifies disk partitions. `mkfs` creates a filesystem in a partition, `fsck` checks it, and `mount` attaches it to the…

• A. tty ^c
• B. stty intr \^c
• C. stty echoe
• D. stty echo \^a

Explanation: `stty intr \^c` changes the terminal's interrupt character to Control-C.

• A. sort
• B. wc
• C. grep
• D. cat

Explanation: A filter reads standard input, transforms or selects data, and writes standard output; `sort`, `wc`, and `grep` are classic filters.

• A. x
• B. q!
• C. :w
• D. :q

Explanation: The `:w` command writes the current file to disk and leaves the user in vi, allowing further editing.

• A. stands for Linux loader
• B. is the Linux boot loader
• C. is a tool used to boot the Kernel on x86 hardware
• D. All of the above

Explanation: LILO means Linux Loader and is a boot loader traditionally used to load the Linux kernel, especially on x86 systems.

• A. mv *.* /bin/
• B. mv * /bin/*
• C. mv * ../bin
• D. mv * ../bin *.*

Explanation: `mv * ../bin` moves the non-hidden files and directories from the current directory into the `bin` directory in its parent directory.

• A. mkfs
• B. fdisk
• C. fsck
• D. mount

Explanation: `fsck` checks file-system structures and repairs detected inconsistencies.

• A. !
• B. $
• C. #
• D. @

Explanation: In older Unix terminal conventions, `#` served as the erase character for correcting the previous typed character.

• A. NFS
• B. SMB
• C. NIS
• D. DNS

Explanation: DNS, or the Domain Name System, resolves human-readable domain names such as `example.com` into IP addresses.

• A. Bill Gates
• B. Ben Thomas
• C. Richard Stallman
• D. Linus Torvalds

Explanation: Linus Torvalds created and initiated development of the Linux kernel in 1991.

• A. /usr
• B. /tmp
• C. /opt
• D. /mntEngineering & Technology

Explanation: `/usr` contains standard user programs and administrative commands, commonly under `/usr/bin` and `/usr/sbin`.

• A. constructs packets of data and sends them across the network
• B. controls error detection and correction
• C. defines the electrical characteristics of signals passed between the computer and communication devices
• D. All of the above

Explanation: The physical layer specifies how bits are represented and transmitted, including the electrical characteristics of signals and interfaces.