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Advanced Level Linux Certification

Question No: 1

What is the purpose of the smartd daemon?

  1. It is a user space daemon used for reading smart cards and integrated circuit chips.

  2. It attempts to automatically repair file systems upon a failed file system check.

  3. It monitors process activity and helps the kernel decide which processes to kill when the kernel overcommits.

  4. It monitors certain disk drives and attempts to predict when they will fail.

Answer: D

Question No: 2

Which of the following are common backup systems used in Linux? (Choose TWO correct answers.)

  1. Amanda

  2. Bacula

  3. DrBackup

  4. BREWBackup

  5. SARcheck

Answer: A,B

Question No: 3

Which of the following tools are used to measure memory usage? (Choose THREE correct answers.)

  1. mpstat

  2. pstree

  3. sar

  4. top

  5. vmstat

Answer: C,D,E

Question No: 4

Due to extreme system use, a Linux system requires some additional swap space. To initialize 5GB of additional swap space, which combination of commands should be used?

  1. dd if=/dev/zero of=/tmp/swapfile bs=1024 count=5120000; mkswap /tmp/swapfile; mount

    /tmp/swapfile

  2. dd if=/dev/zero of=/tmp/swapfile bs=1024 count=5120000; swapon /tmp/swapfile

  3. dd if=/dev/zero of=/tmp/swapfile bs=1024 count=5120000; mkswap /tmp/swapfile; swapon /tmp/swapfile

  4. touch -5G /tmp/swapfile; swapon /tmp/swapfile

  5. mkswap /tmp/swapfile 512000; swapon /tmp/swapfile

Answer: C

Question No: 5

What component of a system does smartd monitor?

  1. CPU

  2. RAM

  3. Hard drives

  4. Ethernet traffic

Answer: C

Question No: 6

Which of the following commands will list the IPv4 neighbors of the current system? This includes IP and MAC addresses. (Choose TWO correct answers.)

  1. arp

  2. ifconfig -lv eth0

  3. netstat -al

  4. ip neigh show

Answer: A,D

Question No: 7

Which files are updated as devices are mounted and unmounted to provide information on the currently mounted devices and the options used? (Choose TWO correct answers.)

  1. /proc/dtab

  2. /etc/mtab

  3. /etc/fstab

  4. /proc/mounts

  5. /proc/devices

Answer: B,D

Question No: 8 CORRECT TEXT

Which command is used to create a ISO9660 filesystem? (Specify ONLY the command without any path or parameters.)

Answer: mkisofs, genisoimage

Question No: 9

In this example output, which descriptions match the purpose of the free, buff and cache columns? (Choose THREE correct answers.)

# vmstat 1 100

procs ——memory—– –swap- —io– -system- –cpu– r b swpd free buff cache si so bi bo in cs us sy id wa

0 0 0 282120 134108 5797012 0 0 0 2 0 0 0 0 100 0

0 0 0 282120 134108 5797012 0 0 0 0 1007 359 0 0 100 0

0 0 0 282120 134108 5797012 0 0 0 0 1117 577 0 0 100 0

0 0 0 282120 134108 5797012 0 0 0 0 1007 366 0 0 100 0

  1. Used swap space

  2. RAM available for filesystem buffers

  3. Available free RAM

  4. RAM used for buffers

  5. RAM used for filesystem cache

Answer: C,D,E

Question No: 10

In the following output, what is the 5 minute load average for the system?

# uptime

12:10:05 up 18 days, 19:00, 2 users, load averagE.0.47, 24.71, 35.31

A. 0.47

B. 24.71

C. 35.31

  1. There is no 5 minute interval. It is some value between 0.47 and 24.71.

  2. There is no 5 minute interval. It is some value between 24.71 and 35.31.

Answer: B

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