Archive for category Exam Details

Certifiable: Why Learn the GUI/TUI AND the Command Line? by Ross Brunson

Lots of people want to know if they should learn either the GUI (Graphical User Interface) or the CLI (Command Line Interface for their certification and also for real life sysadmin work. The correct answer is “both” and we talk about why in this video

For more video fun, visit the LPICPrep Youtube Channel.

RossB

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Question Dissection: Configuring GRUB for Booting

Note: The Question Dissection Series is designed to present a sample LPIC Exam question taken from various sources for study, providing the right and wrong answers with explanations designed to show you how questions should be read and understood. Additionally there are Notes that point to sites, resources and other tools to help you study properly for the concepts contained in the question.

Question: Configuring GRUB for Booting

From objective 101.2 Boot the System

When using the GRUB boot loader, which of the answers describes the first extended partition on the first hard disk in a GRUB configuration?

❍ A. /dev/hda4
❍ B. /dev/dsk/c0d0s3
❍ C. (hd0,4)
❍ D. c:8000

Answer C is correct because GRUB uses a description of (hdx,y) where x is the disk and y is the partition.
Answer A is incorrect because it describes a device file, not a GRUB object.
Answer B is incorrect because it describes a Solaris Unix device.
Answer D is incorrect because it is the debug location for low-level formatting an MFM/RLL disk.

Notes: Remember that GRUB is different from LILO in that it features a mini-command-line interface that features tab-completion, and instead of referring to the disks and partitions by /dev/hda1 etc., you use (hdx,y) where the disk number is x and the partition is y.  A future article will deal with how to install, configure and troubleshoot GRUB.

Several resources can be helpful in learning more about this topic, the first of which would be Chapter 1 of the current version of my LPIC 1 Exam Cram 2 book (look for it in the sidebar ->), starting on Pg 19, the second would be the GRUB man pages ( man grub ).

Any comments, suggestions or questions are welcome.

RossB

Copyright 2000-2009 Ross Brunson

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Question Dissection: Making Boot Diskettes

Note: The Question Dissection Series is designed to present a sample LPIC Exam question taken from various sources for study, providing the right and wrong answers with explanations designed to show you how questions should be read and understood. Additionally there are Notes that point to sites, resources and other tools to help you study properly for the concepts contained in the question.

Question: Making Boot Diskettes

From objective 103.3 Perform basic file management

You need to create a boot disk on a running Linux system. Which command is used to perform this function?

❍ A. rawrite.exe
❍ B. diskcopy
❍ C. makeboot.bat
❍ D. dd

Answer D is correct because the dd command can write disk images from the installation CD-ROM to a floppy.
Answers A, B, and C are incorrect because they run on a DOS/Windows system.

Notes: While making boot diskettes isn’t the most up to date topic, you will definitely find situations still today that require a boot floppy, either because the machine has weird hardware, no DVD drive, or all you need to do is boot and repair something quick.

Several resources can be helpful in learning more about this topic, the first of which would be Chapter 1 of the current version of my LPIC 1 Exam Cram 2 book (look for it in the sidebar ->), starting on Pg 13, the second would be the dd man pages ( man dd ).

Any comments, suggestions or questions are welcome.

RossB

Copyright 2000-2009 Ross Brunson

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Certifiable: LPIC Level 1 Exam Question Types – Part 2 of 2

rossbrunsonCertifiable is a series dedicated to helping you get ready to take the LPIC 1 exams, both in mental state and how to study and experiment more effectively.

LPIC Exam Question Types – Continued…

In part 1 of this mini-series we covered how to take apart and answer the more common question types.  In this, part 2, we’ll cover some of the lesser-well-known question types, ones that the typical Microsoft or Cisco candidate won’t have any experience with, and that can be much more difficult to answer.

Fill-in-the-Blank Questions

This question type has been nicknamed by attendees of my bootcamps as TFQs (those fine questions). Fill-in-the-blanks are the most difficult of the types because the possibility of guessing your way through one is about zero. There is just the question and a large, long text box to type your answer into. Typically, the exams contain 6–11 of these questions, by my estimation.

Rule: If it works on the command line, it should be correct. Don’t get tricky, though, and try to show off your skills—simpler is better. Always double-check exactly what the question wanted. Don’t type in a long command string for a question that asks just for the command name.

Sample Fill-in-the-Blank Question

What command with necessary switches shows you the information page and a complete listing of files for a downloaded RPM package file named pkg1.rpm? (Type in the answer below.)

_____________________________

Answer rpm –qpil pkg1.rpm is correct. When typing in answers, be sure you use that standard order of options, such as the q character coming first in queries, followed by the rest of the options. Long options, such as –nodeps, are typically entered right after the short options.

Note: There are multiple correct versions of these answers. For example a tar command that uses the – before options is correct, and one that has the same options without a – is correct, too.

LPI has a table in the exam software that contains all the right strings; your answer is matched against this table when you click Next.

Identify-the-Component Questions

Very few of these appear on the LPIC exams, but the odd one has been sighted by a few people, including the author. Essentially, you’re shown a graphic and asked to identify the component or to select the correct component from a list of graphics shown as answers. Don’t get excited about how Linux+-like this type of question is; very few of them appear on the LPIC exams.

Sample Identify-the-Component Question

What is the component in the exhibit?  (There will be a picture in the testing interface of a physical component such as a PCMCIA Card.)

❑ A. PCI card
❑ B. VLB card
❑ C. PCMCIA card
❑ D. Async I/O card

Answer C is correct. The card is obviously a PCMCIA card due to the size, style, and connector type on the left side. Answer A is incorrect because the exhibit shows a PCMCIA card. Answer B is incorrect because the exhibit shows a PCMCIA card.
Answer D is incorrect because the phrase Async I/O Card is too ambiguous and doesn’t mean anything.

Warning: Watch out for questions about SCSI connectors or cable ends; counting the pins is
the best option.

Additional Exam Tips

If you are not finished when 95% of the time has elapsed, use the last few minutes to guess your way through the remaining questions.

Tip: Remember that guessing is potentially more valuable than not answering because blank
answers are always wrong, but a guess can turn out to be right.

If you don’t have a clue about any of the remaining questions, pick answers at random or choose all As, Bs, and so on. The important thing is to submit an exam for scoring that has an answer for every question.

Danger, Will Robinson

Be extremely careful when changing previously answered questions! Many an attendee has missed the exam by 10 or 20 points, and when queried how many questions they weren’t sure about and changed, the typical answer is “one or two.” Don’t change answers unless you are certain you have found a better answer in a later question—go with your gut.

Good Luck, we’ll cover next how to go back and study more about what you might have missed, particularly if you’re like a lot of people and get to, umm, take the exam again in a few weeks…

Enjoy,

RossB

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Certifiable: LPIC Level 1 Exam Question Types – Part 1 of 2

rossbrunsonCertifiable is a series dedicated to helping you get ready to take the LPIC 1 exams, both in mental state and how to study and experiment more effectively.

LPIC Exam Question Types

In this article, you will learn more about how the LPIC test questions look and how they can and should be answered. Several types will be unfamiliar to those used to Microsoft and Cisco exams; these are covered in detail along with the usual question types/suspects.

Overall, the LPIC exams are most similar to the Sun Solaris exams; they feature the same question types and similar styles of answers. LPIC questions are short, blunt, and easy to answer if you’ve done the action or item being tested. I have seen grown-ups nearly cry  in frustration, particularly if the requisite labs and studying haven’t been performed.

Multiple-choice Questions

Multiple-choice questions are single-answer, as opposed to a Choose Two or Choose All That Apply question. LPIs are much the same as any other vendor’s multiple-choice questions. The main difference consists of long command strings and a lot of options to parse through. There is only one answer, and this question type is the easiest to get through.

Tip: An important strategy for getting through multiple-choice questions is to read all the possible answers and discard any that are silly, obscure, or outright wrong. It’s possible to not know the answer and get the question right through the process of elimination.

This is a main reason the LPIC exams have so many of the other question types—they don’t want us to guess our way into a certification!  Guessing a Multiple-Choice is not very hard, you have at least a 1 in 4 chance, maybe as high as 50/50 if you read it right.

Sample Multiple-choice Question

Which of the following commands shows the full listing of normal files in the current directory?

❍ A. ls –l
❍ B. ls -1
❍ C. du .
❍ D. df -h

Answer A is correct because the ls command and stat are the only utilities to show a full set of inode information about a file.
Answer B is incorrect because the 1 option shows files in a single column and shows just the filenames.
Answer C is incorrect because the du command doesn’t show the full file information.
Answer D is incorrect because the df command shows only the free/used disk space.

Choose Two/Three Questions

These are a little tougher than the multiple-choice questions because there are usually five or six answers and the question has you choose two or three answers from the available choices. Not selecting enough of the answers marks this question in the review screen as incomplete. If the exam wants you to choose all the correct answers from the list, the question states, “Choose all that apply.”

Sample Choose Two/Three Question

Which steps must be performed before a newly installed hard drive is available for use by a normal user account? (Choose three.)

❑ A. mkfs
❑ B. mount
❑ C. scsi_info
❑ D. dd
❑ E. fdisk

Answers A, B, and E are correct. For a disk to be used by a standard or normal user, it must have at least one partition put on it (fdisk), have a file system of some type on that partition (mkfs), and be mounted by the root user or an entry in the /etc/fstab file that enables users to mount it without the root user’s help.
Answer C is incorrect because the scsi_info tool gathers information about SCSI devices but is not necessary to the process of a user gaining access to a disk.
Answer D is incorrect because the dd command transfers one file format to another but has no effect on users accessing disks.

Choose All That Apply Questions

More difficult than the previous types, these actually make you think through all the possible answers because any of them might be right. LPI is the only vendor to my knowledge that uses these questions with only a single answer in some cases. The best strategy is to read all the answers and mark the correct ones. Use your note paper to keep track if it’s confusing.

Sample Choose All That Apply Question

Which of the following commands creates a second file that is identical to the first? (Choose all that apply.)

❑ A. cp file1 file2
❑ B. cat file1 | file2
❑ C. cp < file1 > file2
❑ D. dd if=file1 of=file2
❑ E. cat file1 > file2

Answers A, D, and E are correct. Using the cp command to copy one file to the other is normal; the difference between answers B and E is the incorrect use of the | symbol to another file. It must be followed by a program, and the unusual usage of the dd command will work in this case.
Answer B is incorrect because files may not be redirected via a pipe symbol (|).
Answer C is incorrect because the use of the < and > characters produces a syntax error.

To Be Continued…

RossB

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Certifiable: Preparing for the LPIC Level 1 Certification – Part 2

rossbrunsonCertifiable is a series dedicated to helping you get ready to take the LPIC 1 exams, both in mental state and how to study and experiment more effectively.

In Part 1 of the Certifiable Series we discussed studying for your LPIC, how to succeed and how to fail.

How Ready are You for the Exams?

How ready are you to take and pass the LPI Level 1 exams? This article is designed to give you an inside view of many details that often escape examinees until they’ve taken their first exam, win or lose.  Every bit of advance information that can be conveyed to you will help reduce your stress, dispel the unknown and make you that much more likely to succeed in passing your exam.

The Exams

You will be taking two exams as a part of this certification: the 117-101 and 117-102.  In older previous versions of the exams you had two choices for the first exam: 117-101 RPM and 117-101 DPKG.  The two 101 exams were identical, except that the RPM exam covers the RPM package style, whereas the DPKG exam focuses on Debian’s .deb packaging style.

Now we’re back to two exams, 101 and 102, with topic 102 of exam 101 being Linux Installation and Package Management, containing both the RPM and DPKG packaging styles, as well as adding the YUM package management style.

Sections and Weights

The exam’s are broken up into sections, 101-104 for the first (101) exam, and 105-110 for the second (102) exam, (see below).  Each section contains multiple sub-sections, such as GNU and Unix Commands containing 103.1 Work on the command line and 103.3 Perform basic file management, among many others.  Each sub-section’s contents are assigned question weights.

Note: Weights on an exam topic denote how many questions are likely to appear on the exam, not how much is scored for each question.

The table below shows the main section numbers, names and weights for reference.

examtable

It’s good to know the breakdown of sections and questions for the exams before you take them. This information is not proprietary; it’s just something you don’t typically see unless you take the exams or do extensive research with the LPI Objectives Wiki.

Taking the Actual Exams

The LPIC exams are all 90 minutes in length. A reminder of this time amount is the ticking clock on the screen that lets you know how much time is left before they kick you out of the exam, or you’re done.

Both of the major testing vendors use similarly functioning systems, so anywhere you take the LPIC exams will have the same methodology of exam generation. LPIC exams are randomly generated at the time of registration and then downloaded to the testing center on the day of testing. Each and every exam is randomly generated, with the questions doled out based on the weights and section.  If, by chance, two people register at the same time, they might get vaguely similar exams, but it should be noted that even between the two exams the order of the questions and the order of the answers for the questions will be randomized. It’s extremely unlikely that two examinees will get an identical exam or get the same exam mix and questions for a retake. Don’t bother trying to figure out what will appear the next time; be sure to look at the second sheet of your test results and study further for the sections you didn’t do well on.

Taking the exam is quite an adventure, and it involves real thinking as well as skill and time management. This series shows you what to expect and how to deal with the potential problems, puzzles, and predicaments you are likely to encounter.

Beta Questions

Warning:  Exams can contain a number of beta questions, making them longer and adding additional time to compensate for those questions.  Many examinees are somewhat taken aback by this practice, and I’m not a fan of experimenting on the paying customers in this way, but it’s a fact of life and you should be prepared for it.  These beta questions are being vetted, measured for how many people pass or fail each one and then normalize later for inclusion into future exam question pools.

LPI does not let you know beforehand if you’re taking an exam containing beta questions, you just find out when you sign in and start taking the exam.  If the number of exam questions is greater than the total of the question weights for that exam’s objectives, you can count on those extra questions being of the beta variety.  For example, a normal exam is around 60 questions and allots 1.5 hours to complete the exam, whereas a beta exam will be 80 questions and is alloted 2 hours to complete.  Unfortunately, the beta questions are interspersed with the exam questions that count for your score and you can’t safely ignore or skip any question.

For those who have left-over mental capacity while taking an exam, beta or otherwise, please help the process by adding a comment to any question that seems to have a problem or that you feel could be made either more clear or to the point.  You’ll get a nice warm feeling of helping others and who knows, you might want to join the exam development group as a result.

Tips and Tricks to Succeed

One of the strategies that attendees seem to have great success with is skipping and marking questions they don’t know or that will take a lot of time to answer. This requires a lot of discipline, contrary to conventional wisdom. I’ve heard of people getting the answers to previous questions from reading and answering later ones—several people who experienced mental vaporlock had their memories jogged by a question and were able to navigate back and change a wrong answer.

This isn’t cheating, no matter what a purist might say. It’s intelligent use of the interface and your own skills; the testing environment is stressful enough without having your brain lock up on you. Additional stressors include a boss who said, “Don’t come back without your certification,” and knowing that everyone else is waiting for you to emerge victorious before they take the exam! Nothing like being the point man or woman….

Ending the Exam

The next-to-last screen presented at the end of the exam is the Review screen. This is where you can see whether you’ve not answered a question (denoted by a red mark next to it), left any choose-two or three questions with too few answers (same red mark), or marked any questions for review (black check/X next to it).

Warning: It’s essential that you revisit the incomplete or marked questions before you click the End Exam button because it’s too late then!

A certain number of attendees will try to outguess the interface and leave the choose-all type of questions with a single or no answer. This does not generate a red mark next to the question, and you might well forget the question, getting it completely wrong.

Tip:  If you marked questions and don’t know the answers, for heaven’s sake, guess!  It’s possible you’ll get some right and I have seen examinees miss passing by one question in this situation, don’t let it be you!

The exam ends when you click the End Exam button. The system will print out two sheets; the section scores will be on the second sheet. You’re not informed of your score until you get out of the exam room or to the printer!

Getting Your Score

This I feel is unnecessarily stressful and can give your evil-minded instructor a chance to mess with you! If a candidate has actually failed an exam, we are straight-faced, empathetic and helpful in remedying their situation with study tips and the odd shoulder to sob on.  However, if a cocky student does pass and needs a bit of teasing, we’re entirely capable of greeting them with a long and serioius face and a conciliatory pat on the back, then springing the winning score on them! Hilarity often ensues.

Enjoy,

RossB

Copyright 2000-2009 Ross Brunson

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