WGU - D426: OBJECTIVE ASSESSMENT LATEST 2026/2027 ACTUAL EXAM QUESTIONS WITH CORRECT ANSWERS 100% VERIFIED GRADED A+

WGU - D426: OBJECTIVE
ASSESSMENT LATEST 2026/2027
ACTUAL EXAM QUESTIONS WITH
CORRECT ANSWERS 100% VERIFIED
GRADED A+
1. DatabasemApplicationm-
mCORRECTmANSWERmSoftwaremthatmhelpsmbusinessmusersminteractmwithmdatabasemsystem


s.



2. DatabasemAdministratorm-
mCORRECTmANSWERmResponsiblemformsecuringmthemdatabasemsystemmagainstmunauthorize


dmusers.mAmdatabasemadministratormenforcesmproceduresmformusermaccessmandmdatabasems
ystemmavailability.



3. Authorizationm-
mCORRECTmANSWERmManymdatabasemusersmshouldmhavemlimitedmaccessmtomspecificmtable


s,mcolumns,mormrowsmofmamdatabase.mDatabasemsystemsmauthorizemindividualmusersmtomacc
essmspecificmdata.



4. Rulesm-
mCORRECTmANSWERmDatabasemsystemsmensuremdatamismconsistentmwithmstructuralmandmb


usinessmrules.



5. QuerymProcessorm-
mCORRECTmANSWERmInterpretsmqueries,mcreatesmamplanmtommodifymthemdatabasemormretri


evemdata,mandmreturnsmquerymresultsmtomthemapplication.mPerformsmquerymoptimizationmto
mensuremthemmostmefficientminstructionsmaremexecutedmonmthemdata.




6. StoragemManagerm-
mCORRECTmANSWERmTranslatesmthemquerymprocessorminstructionsmintomlow-levelmfile-

, systemmcommandsmthatmmodifymormretrievemdata.mDatabasemsizesmrangemfrommmegabytes
mtommanymterabytes,msomthemstoragemmanagermusesmindexesmtomquicklymlocatemdata.




7. TransactionmManagerm-
mCORRECTmANSWERmEnsuresmtransactionsmaremproperlymexecuted.mThemtransactionmman


agermpreventsmconflictsmbetweenmconcurrentmtransactions.mThemtransactionmmanagermals
omrestoresmthemdatabasemtomamconsistentmstateminmthemeventmofmamtransactionmormsystemmf
ailure.



8. Metadatam-
mCORRECTmANSWERmDatamaboutmthemdatabase,msuchmasmcolumnmnamesmandmthemnumber


mofmrowsminmeachmtable.




9. RelationalmDatabasem-
mCORRECTmANSWERmStoresmdataminmtables,mcolumns,mandmrows,msimilarmtomamspreadshee


t.



10. RelationalmDatabasem-
mCORRECTmANSWERmAllm_________m________msystemsmsupportmthemSQLmquerymlanguage


.



11. RelationalmDatabasem-
mCORRECTmANSWERmRelationalmsystemsmaremidealmformdatabasesmthatmrequiremanmaccurat


emrecordmofmeverymtransaction,msuchmasmbanking,mairlinemreservationmsystems,mandmstude
ntmrecords.



12. MongoDBm(NoSQL)m-mCORRECTmANSWERmThemnewermnon-
relationalmsystemsmaremcalledmNoSQL,mform'notmonlymSQL',mandmaremoptimizedmformbigmdata
.



13. SQLmStatementsm-mCORRECTmANSWERmINSERTminsertsmrowsmintomamtable.

, 14. SELECTmretrievesmdatamfrommamtable.
15. UPDATEmmodifiesmdataminmamtable.
16. DELETEmdeletesmrowsmfrommamtable.



17. CREATEmTABLEm(Statement)m-
mCORRECTmANSWERmAmstatementmthatmcreatesmamnewmtablembymspecifyingmthemtablemand


mcolumnmnames.mEachmcolumnmismassignedmamdatamtypemthatmindicatesmthemformatmofmcol


umnmvalues.mDatamtypesmcanmbemnumeric,mtextual,mormcomplex.



18. DatamTypem-mCORRECTmANSWERmINTmstoresmintegermvalues.
19. DECIMALmstoresmfractionalmnumericmvalues.
20. VARCHARmstoresmtextualmvalues.
21. DATEmstoresmyear,mmonth,mandmday.



22. DatabasemDesignm-mCORRECTmANSWERmAnalysis
23. Logicalmdesign
24. Physicalmdesign



25. AnalysismPhase,mConceptualmDesign,mEntity-RelationshipmModelingm(DatabasemDesign)m-
mCORRECTmANSWERmThismphasemspecifiesmdatabasemrequirementsmwithoutmregardmtomams


pecificmdatabasemsystem.mRequirementsmaremrepresentedmasmentities,mrelationships,mandm
attributes.mAnmentitymismamperson,mplace,mactivity,mormthing.mAmrelationshipmismamlinkmbetw
eenmentities,mandmanmattributemismamdescriptivempropertymofmanmentity.



26. LogicalmDesignm(DatabasemDesign)m-
mCORRECTmANSWERmThismphasemimplementsmdatabasemrequirementsminmamspecificmdatab


asemsystem.mFormrelationalmdatabasemsystems,m_________mdesignmconvertsmentities,mrelat
ionships,mandmattributesmintomtables,mkeys,mandmcolumns.



27. PhysicalmDesignm-
mCORRECTmANSWERmSpecifiesmindexes,mtablemstructures,mandmpartitions.mThismphasemadd