爬蟲考試試題及答案英語

一、單項選擇題（每題2分，共10題）1.WhichlibraryisoftenusedforwebscrapinginPython?A.NumpyB.PandasC.BeautifulSoupD.MatplotlibAnswer:C2.Inwebscraping,whatdoesHTMLstandfor?A.HyperTextMarkupLanguageB.High-TechMarkupLanguageC.HomeTextMarkupLanguageD.HyperlinkandTextMarkupLanguageAnswer:A3.WhatHTTPmethodistypicallyusedtoretrievedatafromawebpage?A.POSTB.PUTC.DELETED.GETAnswer:D4.Whichofthefollowingisacommonformatfordataretrievedinwebscraping?A.JSONB.BMPC.MP3D.ZIPAnswer:A5.Whenscrapingawebsite,ifyouencounteraCAPTCHA,whatdoesitusuallymean?A.Youcancontinuescrapingwithoutanyproblem.B.Thewebsiteistryingtopreventautomatedaccess.C.Thewebsiteisbroken.D.Youhavesuccessfullyscrapedallthedata.Answer:B6.Whatisthepurposeofauser-agentinwebscraping?A.Tohidetheidentityofthescraper.B.Tospeedupthescrapingprocess.C.Tomakethedatalooknicer.D.Tochangethelanguageofthewebsite.Answer:A7.WhichofthefollowingcanbeusedtoparseXMLdatainPython?A.xml.etree.ElementTreeB.json.loadsC.csv.readerD.re.findallAnswer:A8.Ifawebsite'sstructurechangesfrequently,whichaspectofwebscrapingwillbemostaffected?A.DatastorageB.DataanalysisC.ThescrapingscriptD.NetworkconnectionAnswer:C9.WhatistheroleofXPathinwebscraping?A.Itisusedtodefinethepathtoafileontheserver.B.ItisusedtolocateelementsinanHTMLorXMLdocument.C.Itisusedtoencryptthedataduringscraping.D.Itisusedtomanagetheuseraccountsonthewebsite.Answer:B10.Whichofthefollowingisagoodpracticetoavoidoverloadingawebsitewhilescraping?A.Scrapingasfastaspossible.B.Addingadelaybetweenrequests.C.ChangingtheIPaddressfrequently.D.Ignoringthewebsite'stermsofuse.Answer:B二、多項選擇題（每題2分，共10題）1.Whichofthefollowingareimportantconsiderationswhenscrapingawebsite?A.Website'stermsofuseB.DataprivacyregulationsC.FrequencyofrequestsD.ThecolorofthewebsiteAnswer:A,B,C2.Whatcanbeusedtostorethescrapeddata?A.Database(e.g.MySQL)B.CSVfileC.JSONfileD.ExcelspreadsheetAnswer:A,B,C,D3.Whichtechniquescanbeusedtohandlepaginationinwebscraping?A.Findingthe'nextpage'linkandfollowingit.B.UsingURLparameterstocalculatethenextpage.C.Ignoringpaginationandonlyscrapingthefirstpage.D.Askingthewebsiteownerforallpagesatonce.Answer:A,B4.Whichofthefollowingarepossiblechallengesinwebscraping?A.Anti-scrapingmechanismsB.ChangingwebsitestructuresC.HandlingdifferentencodingsD.UnlimitedbandwidthAnswer:A,B,C5.Whatarethebenefitsofusingaproxyserverinwebscraping?A.Hidingthescraper'sIPaddress.B.Bypassinggeographicalrestrictions.C.Increasingthescrapingspeed.D.Changingthewebsite'scontent.Answer:A,B6.Whichprogramminglanguagesarecommonlyusedforwebscraping?A.PythonB.JavaC.RubyD.C++Answer:A,B,C7.WhatcanbeusedtoextracttextfromHTMLtags?A.RegularexpressionsB.BeautifulSoup'smethodsC.XPathexpressionsD.JavaScriptfunctionsAnswer:A,B,C8.Whichofthefollowingarevalidwaystostartawebscrapingproject?A.Analyzingthewebsite'sstructure.B.Decidingonthedatatobescraped.C.Ignoringanylegalissues.D.Choosingtheappropriatetools.Answer:A,B,D9.Whatshouldyoudoifyougeta404errorduringwebscraping?A.CheckiftheURLiscorrect.B.Assumethewebsiteisdown.C.TryadifferentIPaddress.D.IgnoreitandcontinuewithotherURLs.Answer:A10.Whichofthefollowingcanaffectthequalityofthescrapeddata?A.Incompletescrapingduetoerrors.B.Incorrectdataextractionmethods.C.Usinganold-fashionedprogramminglanguage.D.Thepopularityofthewebsite.Answer:A,B三、判斷題（每題2分，共10題）1.Webscrapingisalwayslegal.(False)2.BeautifulSoupcanonlybeusedwithPython.(True)3.Whenscraping,wedon'tneedtoworryaboutthewebsite'srobots.txtfile.(False)4.JSONdataismoredifficulttohandlethanHTMLdatainwebscraping.(False)5.AsinglewebsitecanhavedifferentHTMLstructuresfordifferentpages.(True)6.Wecanscrapedatafromanywebsitewithoutpermission.(False)7.Theuser-agentstringcanbesetrandomlyinwebscraping.(False)8.XPathcanonlybeusedtoscrapeXMLdata.(False)9.Scrapingdatafromawebsitewillnotaffectitsperformance.(False)10.Thereisnoneedtocleanthescrapeddata.(False)四、簡答題（每題5分，共4題）1.Brieflyexplainwhatwebscrapingis.Answer:Webscrapingistheprocessofextractingdatafromwebsites.Itinvolvessendingrequeststowebpages,retrievingtheHTMLorotherdataformats,andthenparsingthedatatoextracttherelevantinformation.2.Whatistheimportanceofhandlingerrorsinwebscraping?Answer:Handlingerrorsisimportantasitallowsthescrapingprocesstocontinuesmoothly.Errorscanoccurduetovariousreasonslikenetworkissues,changesinwebsitestructure.Ifnothandled,itmaystopthescrapingprocessandleadtoincompletedatacollection.3.Howcanyouensurethatyourwebscrapingactivityisethical?Answer:Ensurecompliancewiththewebsite'stermsofuse,respectdataprivacyregulations,andlimitthefrequencyofrequeststoavoidoverloadingthewebsite.4.NametwowaystoextractdatafromHTMLtagsotherthanusingregularexpressions.Answer:BeautifulSoupmethodsandXPathexpressionscanbeusedtoextractdatafromHTMLtagsotherthanregularexpressions.五、討論題（每題5分，共4題）1.DiscusstheadvantagesanddisadvantagesofusingPythonforwebscraping.Answer:AdvantagesincludealargenumberoflibrarieslikeBeautifulSoupandScrapy,easy-to-readcode.Disadvantagesmaybeslowerperformancecomparedtosomelower-levellanguagesandpotentialmemoryissueswhendealingwithlargeamountso