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LPI 101-500

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LPI 101-500
David OkOk
Quiz by David OkOk, updated 12 months ago
David OkOk
Created by David OkOk over 2 years ago
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Resource summary

Question 1

Question
1.- Which configuration file defines GRUB 2 menu entries?
Answer
  • /boot/grub/menu.lst
  • /etc/grub.d/40_custom
  • /boot/grub2/grub.cfg
  • /etc/default/grub.cfg

Question 2

Question
2.- Which command regenerates the GRUB 2 configuration file?
Answer
  • update-grub
  • grub2-mkconfig
  • grub-install
  • grub-rebuild

Question 3

Question
3.- What is the function of /etc/default/grub?
Answer
  • Stores kernel modules
  • Sets default GRUB 2 parameters
  • Lists boot menu entries
  • Defines BIOS boot order

Question 4

Question
4.- Which command installs the GRUB 2 boot loader to a device?
Answer
  • grub2-install /dev/sda
  • update-grub /dev/sda
  • install-grub2 /dev/sda
  • bootctl install /dev/sda

Question 5

Question
5.- What is the role of the initrd or initramfs image?
Answer
  • Loads kernel modules needed to mount the root filesystem
  • Stores BIOS configuration
  • Contains the GRUB menu
  • Holds user login data

Question 6

Question
6.- Where is the MBR located on a disk?
Answer
  • First 512 bytes of the first partition
  • First 512 bytes of the disk
  • At the end of the disk
  • In /boot

Question 7

Question
7.- What does the BIOS do before loading GRUB?
Answer
  • Initializes hardware and reads the MBR
  • Loads the Linux kernel directly
  • Executes /sbin/init
  • Checks /boot/grub.cfg

Question 8

Question
8.- How do you add a custom GRUB 2 menu entry?
Answer
  • Edit /boot/grub2/grub.cfg directly
  • Add a script in /etc/grub.d/40_custom
  • Modify /etc/fstab
  • Use update-boot

Question 9

Question
9.- What command updates the bootloader configuration on Debian systems?
Answer
  • update-grub
  • grub2-install
  • dpkg-reconfigure grub
  • bootctl update

Question 10

Question
10.- Which GRUB 2 command line option lets you edit boot parameters temporarily?
Answer
  • Press e
  • Press c
  • Press d
  • Press Esc

Question 11

Question
11.- In GRUB 2, what does the set root=(hd0,1) command do?
Answer
  • Mounts the root filesystem
  • Specifies which partition GRUB uses to load files
  • Starts the kernel
  • Loads the MBR

Question 12

Question
12.- Which file lists all kernels installed on a Debian system?
Answer
  • /etc/kernel.conf
  • /boot/ directory
  • /etc/default/kernel
  • /usr/lib/modules

Question 13

Question
13.- What does the GRUB command linux /vmlinuz do?
Answer
  • Loads kernel image into memory
  • Loads GRUB modules
  • Mounts root filesystem
  • Starts init process

Question 14

Question
14.- How can you restore GRUB 2 if it becomes corrupted?
Answer
  • Boot from live media and run grub2-install + grub2-mkconfig
  • Reinstall Linux
  • Run init 6
  • Format /boot

Question 15

Question
15.- Which GRUB 2 command boots the system after manual setup?
Answer
  • boot
  • run
  • exec
  • init

Question 16

Question
16.- What is the default timeout variable in /etc/default/grub?
Answer
  • GRUB_WAIT
  • GRUB_TIMEOUT
  • GRUB_DELAY
  • BOOT_TIMEOUT

Question 17

Question
17.- Which command in GRUB’s shell lists available partitions?
Answer
  • ls
  • show devices
  • devices
  • partlist

Question 18

Question
18.- What GRUB 2 feature allows password protection of menu entries?
Answer
  • set secure
  • password_pbkdf2
  • encrypt_menu
  • auth on

Question 19

Question
19.- Which directory contains GRUB 2 module files (*.mod)?
Answer
  • /usr/lib/grub/
  • /boot/grub2/i386-pc/
  • /etc/grub.d/
  • /sbin/grub/

Question 20

Question
20.- What command shows the current runlevel?
Answer
  • runlevel
  • systemctl status
  • who -r
  • initctl list

Question 21

Question
21.- In systemd, which command lists available targets?
Answer
  • systemctl list-units --type=target
  • systemctl targets
  • systemctl list-targets
  • initctl list-targets

Question 22

Question
22.- Which GRUB 2 directive sets the default boot entry?
Answer
  • GRUB_DEFAULT
  • GRUB_BOOT
  • DEFAULT_ENTRY
  • GRUB_ENTRY

Question 23

Question
23.- In GRUB, what does initrd /initrd.img specify?
Answer
  • The root filesystem
  • The initial RAM disk image
  • The boot partition
  • The kernel version

Question 24

Question
24.- What command lists the libraries required by a binary?
Answer
  • ldconfig
  • ldd
  • lslib
  • objdump

Question 25

Question
25.- Where are 64-bit libraries typically stored?
Answer
  • /usr/lib64
  • /usr/lib32
  • /lib
  • /usr/local/lib

Question 26

Question
26.- What does the /etc/ld.so.conf file specify?
Answer
  • Kernel module paths
  • Extra directories for shared libraries
  • PATH variable
  • Default runlevel

Question 27

Question
27,. Which command updates the library cache after installing a new library?
Answer
  • ldconfig
  • update-lib
  • libcache
  • reload-libs

Question 28

Question
28.- What is the default library cache file used by the dynamic linker?
Answer
  • /etc/ld.so.cache
  • /usr/lib/cache
  • /etc/lib.conf
  • /var/lib/ld.cache

Question 29

Question
29.- Which environment variable defines additional library search paths?
Answer
  • LD_PATH
  • LD_LIBRARY_PATH
  • LIB_PATH
  • SHLIB_PATH

Question 30

Question
30.- Which file lists all directories known to ldconfig?
Answer
  • /etc/ld.so.conf.d/
  • /usr/lib/ldconfig.d/
  • /var/lib/lib.conf
  • /etc/lib.paths

Question 31

Question
31.- What does the linker use to find shared libraries?
Answer
  • Symbol tables
  • SONAME
  • Library manifest
  • Header files

Question 32

Question
32.- How do you display the SONAME of a shared library?
Answer
  • objdump -p libname.so
  • ldconfig -p
  • nm libname.so
  • strings libname.so

Question 33

Question
33.- What is the purpose of symbolic links like libc.so.6 → libc-2.31.so?
Answer
  • Provide backward compatibility for linker resolution
  • Save disk space
  • Allow kernel modules to link
  • Compress libraries

Question 34

Question
34.- What command finds out which libraries are currently loaded by a running process?
Answer
  • cat /proc/<pid>/maps
  • ps aux
  • ldd
  • ls /proc/<pid>/fd

Question 35

Question
35.- Which file controls global dynamic linker options?
Answer
  • /etc/ld.so.conf
  • /etc/ld.so.preload
  • /etc/ld.so.cache
  • /usr/lib/ld.so.conf

Question 36

Question
36.- What does the program loader /lib64/ld-linux-x86-64.so.2 do?
Answer
  • Loads and links dynamic executables at runtime
  • Compiles C programs
  • Loads kernel modules
  • Runs shell scripts

Question 37

Question
37.- Which tool can you use to inspect dependencies of a shared library?
Answer
  • ldd
  • readelf -d
  • lsmod
  • objcopy

Question 38

Question
38.- What file extension identifies shared libraries on Linux?
Answer
  • .a
  • .lib
  • .so
  • .dll

Question 39

Question
39.- What is the role of static libraries?
Answer
  • Linked into programs at compile time
  • Loaded at runtime
  • Used by kernel only
  • Managed by ldconfig

Question 40

Question
40.- Which option links a program statically using gcc?
Answer
  • gcc -static
  • gcc --link
  • gcc --no-shared
  • gcc -nostdlib

Question 41

Question
41.- What command lists all shared libraries currently cached?
Answer
  • ldconfig -p
  • ldd
  • ls /usr/lib
  • ldconfig --list

Question 42

Question
42.- How can you temporarily preload a library when running a program?
Answer
  • LD_PRELOAD=/path/lib.so ./program
  • export LIB_PRELOAD
  • ldconfig --load
  • gcc -l preload

Question 43

Question
43.- What is the effect of removing /etc/ld.so.cache?
Answer
  • No libraries will be found until ldconfig runs
  • Libraries load faster
  • System won’t boot
  • Kernel panics

Question 44

Question
44.- What is contained in /lib directory?
Answer
  • Essential shared libraries needed for boot and basic commands
  • User libraries
  • Optional modules
  • Temporary files

Question 45

Question
45.- Which command displays the dynamic section of an ELF executable?
Answer
  • readelf -d
  • ldd
  • nm
  • objdump -x

Question 46

Question
46.- The .a library files are used for:
Answer
  • Dynamic linking
  • Static linking
  • Module loading
  • Shared memory

Question 47

Question
47.- What is a key advantage of dynamic linking?
Answer
  • Smaller binaries and easier updates
  • Faster startup time
  • Complete independence from libraries
  • Requires no runtime loader

Question 48

Question
48.- What command finds which executable would be run by default?
Answer
  • which
  • whereis
  • find
  • locate

Question 49

Question
49.- How can you determine whether a binary is statically or dynamically linked?
Answer
  • ldd binary
  • file binary
  • nm binary
  • strings binary

Question 50

Question
50.- What environment variable overrides the default dynamic linker?
Answer
  • LD_LIBRARY_PATH
  • LD_PRELOAD
  • LD_SO
  • LD_ASSUME_KERNEL

Question 51

Question
51.- Which command installs a .deb package directly?
Answer
  • dpkg -i
  • apt install
  • aptitude add
  • installpkg

Question 52

Question
52.- Which command lists all installed packages on a Debian system?
Answer
  • dpkg -l
  • apt list --repos
  • apt-get show
  • dpkg-query -a

Question 53

Question
53.- Which command removes a package but leaves configuration files?
Answer
  • dpkg -P
  • dpkg -r
  • apt purge
  • apt remove --purge

Question 54

Question
54.- What is the function of dpkg -P?
Answer
  • Purges package completely
  • Prints package info
  • Prepares a package
  • Patches dependencies

Question 55

Question
55.- Which command shows the files installed by a package?
Answer
  • dpkg -L package
  • dpkg -c package.deb
  • dpkg -S package
  • dpkg -p package

Question 56

Question
56.- Which file lists local APT repositories?
Answer
  • /etc/apt/sources.list
  • /etc/apt/repos.conf
  • /etc/apt/packages.conf
  • /var/lib/apt/cache

Question 57

Question
57.- What command updates the local APT package list?
Answer
  • apt update
  • apt upgrade
  • apt-cache
  • dpkg --refresh

Question 58

Question
58.- Which command upgrades all installed packages?
Answer
  • apt full-upgrade
  • apt-get install -u
  • apt upgrade
  • dpkg -U

Question 59

Question
59.- Which command installs a package and dependencies?
Answer
  • dpkg -i
  • apt install
  • apt-cache add
  • rpm -i

Question 60

Question
60.- What does the apt autoremove command do?
Answer
  • Removes unnecessary packages installed as dependencies
  • Deletes all old kernels
  • Removes orphaned files
  • Cleans the APT cache
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LPI 101-500
David OkOk
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