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3X0-201 - Core Concepts and Practices (Level 2) - Dump Information

Vendor : Sair
Exam Code : 3X0-201
Exam Name : Core Concepts and Practices (Level 2)
Questions and Answers : 91 Q & A
Updated On : December 8, 2017
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3X0-201 Questions and Answers

3X0-201


QUESTION: 40

After creating a recovery file system and building a kernel for the recovery disk, which command will directly copy the kernel to the floppy /dev/fd0?


  1. cp if=KERNEL of=/dev/fd0

  2. cp -b if=/dev/fd0 of=KERNEL bs=10k

  3. rawrite of=KERNEL if=/dev/fd0 bs=1k

  4. dd if=KERNEL of=/dev/fd0 bs=1k


Answer: D


QUESTION: 41

Which of the following is a task that the netstat command can perform?


  1. It determines where on a network a packet is dropped.

  2. It prints the individual packet status of a network.

  3. It measures the baud rate between two machines.

  4. It lists all current connections on a particular machine.

  5. It monitors the number of collisions on a network.


Answer: D


QUESTION: 42

Which of the following tasks does the netperf command perform?


  1. It monitors the traffic on a network.

  2. It measures the number of packets traveling over an entire network with multiple machines.

  3. It measures the baud rate between two machines.

  4. It monitors the number of collisions on a network.

  5. It changes the precedence of given packets over a network.


Answer: C


QUESTION: 43

Betsy wants to build a more sophisticated ipchains rule set for her firewall by adding a user-defined rule list. This customized rule list will be a single chain that will provide the highest level of security to the protected network. What is the minimum number of chains in Betsy's firewall?


  1. One

  2. Two

  3. Three

  4. Four


Answer: D


QUESTION: 44

Jim needs to put a new application on his machine, but he is not sure exactly how much hard drive space he has left on his machine. Which of the following commands will show Jim how much space he has left on his drive?


  1. du

  2. df

  3. hdparm

  4. fdisk


Answer: B


QUESTION: 45

An administrator needs to implement specialized packet alteration beyond the usual scope of iptables filtering. Which of the following iptables rulesets will the administrator need to customize to accomplish this goal?


  1. filter

  2. custom

  3. nat

  4. mangle


Answer: D


QUESTION: 46

Lisa has recently implemented a series of ipchains rules to secure a Local Area Network (LAN). She is doing maintenance on the rule sets and has entered the sequence of commands below. Which of the following statements does NOT describe a result of the appended rules?

ipchains -A input -i eth0 -s 192.168.1.0/24 -j ACCEPT ipchains -A output -i eth0 -s 192.168.1.0/24 -j REJECT ipchains -A input -i eth0 -d 192.158.1.0/24 -j REJECT ipchains -A output -i eth0 -d 12.6.178.250/32 -j ACCEPT ipchains -A forward -i eth0 -s 192.168.1.0/24 -j MASQ


  1. Packets destined for 12.6.178.250 will be routed to the correct host.

  2. Packets destined for 192.158.1.0/24 will not be allowed into the system or routed.

  3. Packets to be forwarded from 192.168.1.0/24 will appear to come from the local host.

  4. Packets coming from 192.158.1.0/24 will be forwarded to the local host.


Answer: D


QUESTION: 47

Which of the following programs can be used to perform integrity checks on important system files that do not change often?


  1. PGP

  2. SAINT

  3. SATAN

  4. Big Brother

  5. Tripwire


Answer: E


QUESTION: 48

A system administrator is having trouble getting a new client to successfully mount a remote NFS file system. The other hosts on the network can successfully mount the file system. Which of the following options could cause this problem? (Choose two.)


  1. The directory is exported as read/write and the client is mounting it read-only.

  2. The system administrator did not run the exportfs command on the server.

  3. There is no entry for the client in the server's /etc/exports file.

  4. The portmapper port has been closed on the server.

  5. There is no entry for the server in the client's /etc/imports file.


Answer: B, C


QUESTION: 49

The NFS server is experiencing intermittent power disruptions. Each time the server goes down, the program requesting NFS data exits abnormally. This is probably caused by which of the following?


  1. A secondary NIS server on the subnet

  2. NIS being used instead of NIS+


  3. A kernel before 2.1 being used on the server

  4. Improper values for RSIZE and WSIZE in /etc/fstab

  5. Using Soft mounting on the client


Answer: E


QUESTION: 50

Brad, the system administrator, wants to verify that DNS is functioning properly. In order to do this, he points his browser to a high-traffic Web site that he and other employees in the company visit frequently (www.google.com). The Web browser loads the appropriate page for Brad. From this test, Brad concludes that DNS is working properly. Which of the following is TRUE concerning Brad's testing method?


  1. In addition to what he has already done, Brad needs to run the "named" program on his machine in order to get an authoritative response from the name server.

  2. Instead of using a Web browser, Brad should have used the command "ping www.google.com"; ICMP packets are more reliable for name server resolutions.

  3. The test that Brad performed guarantees that DNS is working properly.

  4. If the name server has www.google.com in its cache, then the test does not necessarily prove that DNS is working properly.


Answer: D


Sair 3X0-201 Exam (Core Concepts and Practices (Level 2)) Detailed Information

Sair 3X0-201

3X0-201 exam :: Article by ArticleForgeSAIR 3X0-201 : Core ideas and Practices (level 2) exam

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  • Sair Linux and GNU Certification® Authors: Tobin Maginnis Editors: Cary Sullivan book:   · e-book Sair Linux and GNU Certification: degree II Core concepts and Practices John Wiley & Sons, Inc. new york, big apple, united states of america ©2001ISBN:0471405388 2001 ebook   Bibliometrics · citation count number: 0· Downloads (cumulative): n/a· Downloads (one year): n/a· Downloads (6 Weeks): n/a
    From NUnit to team equipment tests

    one other chapter on my adventure assisting a shopper undertake group device. This time, the purpose changed into to transform their NUnit examine to crew system checks.

    this is not a very elaborate subject given the excellent conversion device purchasable on gotdotnet (right here), which basically does all of the work for you. however, I did come upon just a few concerns.

    earlier than going into that, this is the primary procedure I followed (happily, NUnit exams have been alread 3X0-201y positioned in a single assignment (*.examine)):

    a. Create a brand new test assignment (named *.examine.TS)

    b. Create the fundamental assignment folders

    c. Add the fundamental references

    d. copy *.cs info from *.look at various venture to *.look at various.TS

    e. Set assignment houses if quintessential (build vicinity, postbuild routine, etc.)

    f. construct

    g. function a test run with NUnit to examine every little thing is green

    h. Run the NUnit Converter

    i. eradicate Nunit references and construct again

    j. Run checks in TS and determine consequences with corresponding run in Nunit (g)

    okay. Commit pending alterations

    When the check mission is created, a .vsmdi and a .testrunconfig file are additionally created and brought to the soluiton folder. If new exams are added to the answer, the vsmdi file will need to be checked out. to see all the exams available for the solution, open .vsmdi file (it offers a list view of the verify which can be sorted and grouped -- n.b. the opportunity of grouping assessments into lists is simply attainable when you have VS crew version for Testers).

    When changing a big mission (about 2000 assessments), I needed to get across the following concerns:

    1. category Attribute

    classes don't exist in group equipment. The choice is to use Description attribute or lists (lists are best accessible within the Tester version). The converter tool reacts as follows when discovering a category attribute:

  • If only 1 class on a test formulation, conversion turned into as follows: [Test, Category("sample")] --> [TestMethod(), TestProperty("Category", "sample")]
  • If only 1 class on a class, conversion changed into as follows: [TestFixture, Category("sample")] --> //category: "sample"
  • If multiple category attribute, conversion didn't take place and NUnit conversion tool stops. My answer here changed into pretty simple: guide substitute (I used TextPad as editor)
  • substitute category("\(.+\)"),category("\(.+\)")\] by means of class("\1")]\n[TestProperty("Category","\2")\]

    as an instance: [Test, Category("Business"), Category("More Business")] becomes [Test, Category("Business")] [TestProperty("Category","More Business")]

    note that this is simply a temporary answer to get the converter device to run until the end. The final conversion gives this [TestMethod(), TestProperty("Category","Business")] [TestProperty("Category","More Business")] which isn't correct because the identical property is used twice with distinctive values. The second property may still be modified to TestProperty("Category2","extra enterprise"), for instance (or use Description attribute as a substitute).

  • 2. Partial classes

    Partial courses are not converted because they will not have the TestFixture attribute. You need to add it to ensure that the conversion to run, however afterwards remvoe the corresponding TestClass attribute (since it is a replica considering the fact that the category become partial).

    3. Static strategies.

    as a result of the TestFixtureSetUp conversion to ClassInitialize(), some strategies had to be transformed to static. also, on the grounds that the initialize method is now static, it can not be overriden anymore, nevertheless it doesn't in fact remember as a result of element 4.

    Let me clarify. The initial scenario become as follows: you've got a collection of examine classes that inherit from a father or mother class. This dad or mum class consists of a look at various deploy components used through just about all toddlers. those that want some additional/diverse initialization override the system. Like this:

    [TestFixture] public category BaseTest [TestFixtureSetUp] public digital void InitializeTests() // do some initialization [TestFixture] public category MyTest1 : BaseTest [Test] public voic SomeTest base.InitializeTests(); // do different things [TestFixture] public category MyTest2 : BaseTest [Test] public voic SomeOtherTest base.InitializeTests(); // do other issues public override void InitializeTests() // do any other initialization

    This scenario doesn't work anymore in group system because of points3 and four (initialize methods are static and inheritance isn't supported.

    four. Inheritance is not supported in team system unit tests.

    sure, it is disappointing. This explains why the [TestFixtureSetUp] strategies in a father or mother courses is not called. In group system testing framework there are three attributes to initialize/clean up assessments:

  • TestInitialize/CleanUp
  • ClassInitialize/Cleanup. It replaces your TestFixtureSetUp/TearDown but bear in mind that inheritance is not supported.
  • AssemblyInitialize/Cleanup It runs once at first of each and every system within the meeting.
  • remember to use these attributes. My informed solution is to substitute the TestFixtureSetUp attributes (transformed to ClassInitialize()) in a father or mother classification by AssemblyInitialize and reorganize checks in order that all tests needing this certain initialization are in this meeting.

    Given the instance above, this capability getting rid of inheritance, including an AssemblyInitialize on the InitializeTests components, and moving the MyTest2 classification to an additional meeting (in case you do not desire it to make use of the InitializeTests at all) or adding a TestInitialize formulation to MyTest2.InitializeTests (in case you need to add some additional initialization specific to SomeOtherTest).

    5. lacking TestFixture attribute

    If a category doesn't have the [TestFixture] attribute, it is not converted (in spite of the fact that it contains test methods).


    solution to Little Puzzlers–Validate a Sudoku Board

    here is the manner I went in regards to the "Validate a Sudoku Board” problem. youngsters, bear in mind there are dissimilar ways to resolve this, so don't be anxious in case your solution has adaptations and it’s thoroughly feasible there are more effective methods.

    feel free to imply your solution in the comments right here or in the normal publish, however please be respectful of others’ efforts.

    My strategy

    This one is fairly straight-ahead, your primary project is to make certain that the cost of any given cellphone isn’t replicated in the cell’s row, column, or “cube”.  The issue is how you go about this.  there's an area-effective means, however requires extra looping, or there is a technique that requires simplest visiting any mobile one time, but requires extra space.

    for the reason that the puzzle is mounted in size (9x9 grid), I’ll decide upon more advantageous algorithmic complexity and use area to hold the set of all numbers considered for each and every given row, column, and dice.  by using 27 sets to hold these values (9 for the rows, 9 for the columns, 9 for the cubes), we are able to with ease see if we’ve alread 3X0-201y considered the latest quantity within the given row, column, or cube and instantly declare the puzzle invalid.

    Of course, we could get even more space-efficient and use 27 BitArrays (or one giant one partitioned, and many others.), but then we lose the magnificence of set good judgment.  i admire protecting things logically standard and then optimizing for space after making a choice on there is a necessity, so I’d probably decide to use units in my common reply in an contrast, after which mention that if area were a concern, i'd then optimize to BitArray.

    So, right here’s my solution:

    1: public class SudokuBoard 2: three: inner most read 3X0-201only char[,] board; four: 5: // validate board is a 9x9 array 6: public SudokuBoard(char[,] board) 7: board.GetLength(0) != 9 15: sixteen: public bool Validate() 17: 18: // sure, i could use BitArray for area efficiency, but i love the logical suppose 19: // of the set and the way it returns false on Add() if alread 3X0-201y there. 20: var rows = Enumerable.range(1, 9).opt for(i => new HashSet<char>()).ToArray(); 21: var columns = Enumerable.range(1, 9).select(i => new HashSet<char>()).ToArray(); 22: var cubes = Enumerable.latitude(1, 9).opt for(i => new HashSet<char>()).ToArray(); 23: 24: // manner each and every phone only once 25: for (int row = 0; row < 9; ++row) 26: 27: for (int column = 0; column < 9; ++column) 28: 29: var present = board[row, column]; 30: if (char.IsDigit(current)) 31: 41: 42: forty three: 44: return actual; 45: 46:

    note that I’m not checking for invalid characters for the sake of brevity, notwithstanding we could easily do this in the constructor, or within the Validate() formula itself:

    1: var present = board[row, column]; 2: if (char.IsDigit(latest)) 3: four: // blah blah blah 5: 6: else if (!char.IsWhiteSpace(latest)) 7: eight: return false; 9:

    at last, right here’s an easy driver to illustrate utilization:

    1: public static type Driver 2: 3: public static void perform() four: 5: var board = new char[9,9] 6: 7: '5', 'three', ' ', ' ', '7', ' ', ' ', ' ', ' ', 8: '6', ' ', ' ', '1', '9', '5', ' ', ' ', ' ', 9: ' ', '9', 'eight', ' ', ' ', ' ', ' ', '6', ' ', 10: '8', ' ', '2', ' ', '6', ' ', ' ', ' ', 'three', eleven: '4', ' ', ' ', '8', ' ', 'three', ' ', ' ', '1', 12: '7', ' ', ' ', ' ', '2', ' ', ' ', ' ', '6', 13: ' ', '6', ' ', ' ', ' ', ' ', '2', 'eight', ' ', 14: ' ', ' ', ' ', '4', '1', '9', ' ', ' ', '5', 15: ' ', ' ', ' ', ' ', 'eight', ' ', ' ', '7', '9', sixteen: ; 17: 18: var validator = new SudokuBoard(board); 19: 20: Console.WriteLine("The Sudoku board is " + (validator.Validate() ? "legitimate" : "invalid")); 21: 22: summary

    Hope you had enjoyable with this one!  Of direction, I’m certain many accessible can tweak the answer for performance in a considerable number of methods – however you get the element.

    Have a solution that worked for you but was completely distinct?  I’d love to hear about it!

    live tuned next week for the next Little Puzzler.




    References:


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