Advanced Level Linux Certification v10.0

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Exam contains 126 questions

Which program lists information about files and network connections opened by processes? (Specify ONLY the command without any path or parameters.)

Answer : lsof, /usr/bin/lsof

Which of the following are common Linux filesystem types used for root partitions?
(Choose THREE correct answers.)

  • A. ext4
  • B. VFAT
  • C. NTFS
  • D. XFS
  • E. Btrfs

Answer : A,D,E

The following is an excerpt from the output of tcpdump -nli eth1:
13:03:17.277327 IP > Flags [.], ack 1 (truncated)
13:03:17.598624 IP > Flags [P.], seq (truncated)
Which network service or protocol was used?

  • A. FTP
  • B. HTTP
  • C. SSH
  • D. DNS
  • E. DHCP

Answer : A

Which command will report information on memory usage, paging and block input/output?

  • A. free
  • B. memshow
  • C. ps
  • D. top
  • E. vmstat

Answer : E

In the following output, what percentage of time was the CPU waiting for pending I/O?
# 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

  • A. 0
  • B. 100
  • C. 35.9
  • D. 57.7
  • E. 36.6

Answer : A

Which of the following files will be looked for and used by GNU make, if one of them exists, unless a different file is specified on the command line when trying to compile software from source code? (Choose TWO correct answers.)

  • A. configure
  • B.
  • C. makefile
  • D. Makefile
  • E.

Answer : CD

Which of the following commands can be used to script interactions with various TCP or
UDP services?

  • A. ftp
  • B. nc
  • C. tcpdump
  • D. strings
  • E. wget

Answer : B

What are the options to node.startup in the iscsid.conf file? (Choose TWO correct answers.)

  • A. login
  • B. initiate
  • C. manual
  • D. discover
  • E. automatic

Answer : C,E

A system with SysV-init has a service installed called apache2. Which file controls the start and stop of this service and is referenced by the various runlevel directories?

  • A. /etc/init.d/apache2
  • B. /etc/rc2.d/70apache2
  • C. /etc/rc2.d/apache2
  • D. /etc/rc2.d/apache2.start

Answer : A

When is historical data of resource usage important? (Select THREE correct answers.)

  • A. Predicting when resources will need to be increased.
  • B. Selecting a computer vendor.
  • C. Identifying processes killed during out of memory occurrences.
  • D. Diagnosing capacity problems.
  • E. Troubleshooting a software problem.

Answer : A,D,E

What is the full path to the directory which contains the scripts (or links to the original scripts) to run while the system boots to SysV-init runlevel 2?

Answer : /etc/rc2.d, /etc/rc2.d/, /etc/init.d/rc2.d, /etc/init.d/rc2.d/

In the following output from top, which processes contribute to the percentage of time that the CPU spends in the state of wa?
Tasks: 193 total, 1 running, 190 sleeping, 2 stopped, 0 zombie
Cpu(s): 0.5%us, 0.3%sy, 0.0%ni, 98.2%id, 1.0%wa, 0.0%hi, 0.0%si, 0.0%st

  • A. Processes waiting for user interaction.
  • B. Processes that were already closed and are waiting to be launched again.
  • C. Processes that have not been scheduled yet because they haven't been fully loaded into RAM or are in swap.
  • D. Processes waiting for IO operations to complete.

Answer : D

After configuring a new kernel, what file under /usr/src/linux/ contains the configuration?

Answer : /usr/src/linux/.config, .config

Which of the following is a side effect of extensive usage of swap space?

  • A. The root filesystem may become full because swap space is always located on the system root partition.
  • B. The overall system performance may degrade because of heavy hard disk use and memory reorganization.
  • C. Since processes always exist completely in either RAM or swap, regular RAM may become unused if the kernel does not move processes back from the swap space to memory.
  • D. The memory may become fragmented and slow down the access to memory pages. However, this can be kept to a minimum by the regular use of memfrag -d.
  • E. Applications need to restart because their virtual memory addresses change to reflect memory relocation to the swap address area.

Answer : B

Which directory contains the system-specific udev rule files? (Specify the absolute path including the directory name)

Answer : /etc/udev/rules.d, /etc/udev/rules.d/

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Exam contains 126 questions

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