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Exam (elaborations)

WGU C170 Data Management - Applications Exam Questions With Correct Answers

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  • Course
  • WGU c170
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  • WGU C170

WGU C170 Data Management - Applications Exam Questions With Correct Answers

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  • October 24, 2024
  • 5
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • WGU c170
  • WGU c170
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Constantina
WGU C170 Data Management -
Applications Exam Questions With
Correct Answers

domain c- ccorrect canswers✔✔In cdata cmodeling, cthe cconstruct cused cto corganize cand
cdescribe can cattribute's cset cof cpossible cvalues


superkey c- ccorrect canswers✔✔An cattribute cor cattributes cthat cuniquely cidentify ceach
centity cin ca ctable. cAny ccomposite ckey cwith cthis cis calso cthis.


candidate ckey c- ccorrect canswers✔✔A cminimal csuperkey; cthat cis, ca ckey cthat cdoes
cnot ccontain ca csubset cof cattributes cthat cis citself ca csuperkey


entity cintegrity c- ccorrect canswers✔✔The cproperty cof ca crelational ctable cthat
cguarantees ceach centity chas ca cunique cvalue cin ca cprimary ckey cand cthat cthe ckey
chas cno cnull cvalues


referential cintegrity c- ccorrect canswers✔✔A ccondition cby cwhich ca cdependent ctable's
cforeign ckey cmust chave ceither ca cnull centry cor ca cmatching centry cin cthe crelated
ctable


data cdictionary c- ccorrect canswers✔✔A cDBMS ccomponent cthat cstores cmetadata. cIt
ccontains cthe cdata cdefinition c& ctheir ccharacteristics cand crelationships; cmay calso
cinclude cdata cexternal cto cthe cDBMS


system ccatalog c- ccorrect canswers✔✔A cdetailed csystem cdata cdictionary cthat
cdescribes call cobjects cin ca cdatabase


homonym c- ccorrect canswers✔✔The cuse cof cthe csame cname cto clabel cdifferent
cattributes, cmuch clike csimilar-sounding cwords cwith cdifferent cmeanings


synonym c- ccorrect canswers✔✔The cuse cof cdifferent cnames cto cidentify cthe csame
cobject, csuch cas can centity, can cattribute, cor ca crelationship. cThese cshould cgenerally
cbe cavoided.


not cnull cand cunique c- ccorrect canswers✔✔Any ccandidate ckey cmust chave cthese ctwo
cconstraints cenforced


cardinality c- ccorrect canswers✔✔Term cfor chow cmany cinstances cof cone cobject care
crelated cto cinstances cof canother cobject c(maximum)

, modality c- ccorrect canswers✔✔Term cfor cwhether can cinstance cof ca cspecific centity cis
coptional cor cmandatory cin ca crelationship c(minimum)


connectivity c- ccorrect canswers✔✔Term cfor cthe cclassification cof cthe crelationship
cbetween centities. cClassifications cinclude c1:1, c1:M, cand cM:N


CREATE cSCHEMA cAUTHORIZATION c- ccorrect canswers✔✔SQL ccommand cto
ccreate ca cdatabase cschema


DEFAULT c- ccorrect canswers✔✔SQL coption cto cdefine ca cdefault cvalue cfor ca ccolumn
c(when cno cvalue cis cgiven)


CHECK c- ccorrect canswers✔✔SQL ccommand cto cvalidate cdata cin can cattribute, cused
cduring ctable ccolumn ccreation


CREATE cTABLE cAS c- ccorrect canswers✔✔SQL ccommand cto ccreate ca cnew ctable
cbased con ca cquery cin cthe cuser's cdatabase cschema


HAVING c- ccorrect canswers✔✔SQL coption cthat crestricts ca cselection cof cgrouped
crows cbased con ca ccondition


EXISTS c- ccorrect canswers✔✔SQL coption cthat cchecks cwhether ca csubquery creturns
cany crows


DECIMAL c- ccorrect canswers✔✔SQL cdata ctype clike cthe cNUMBER cspecification, cbut
cthe cstorage clength cis ca cminimum cspecification


True c- ccorrect canswers✔✔True cor cfalse: cif can cINSERT cor cSELECT ccommand cis
cembedded cinside ca cprogram cfor clater cuse, cthe cattribute clist cshould calways cbe
cused, cas cthe ctable cmay cchange cover ctime


inner cjoin c- ccorrect canswers✔✔A cjoin coperation cin cwhich conly crows cthat cmeet ca
cgiven ccriterion care cselected. cThe cmost ccommon ctype cof cjoin


outer cjoin c- ccorrect canswers✔✔A cjoin coperation cthat cproduces ca ctable cin cwhich call
cunmatched cpairs care cretained; cunmatched cvalues cin cthe crelated ctable care cleft cnull


cross cjoin c- ccorrect canswers✔✔A cjoin coperation cthat creturns cthe cCartesian cproduct
cof ctwo csets cor ctables


natural cjoin c- ccorrect canswers✔✔Join ctype cthat creturns conly cthe crows cwith
cmatching cvalues cin cthe cmatching ccolumns; cthe cmatching ccolumns cmust chave cthe
csame cnames cand csimilar cdata ctypes


left, cright, cfull c- ccorrect canswers✔✔Name cthe cthree ctypes cof couter cjoins

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