11Replication in databases is mainly for:AAvailability and read scalingBReducing storageCNormalising dataDWriting queriesView AnswerDiscussWorkspaceReportSaveEasy
12Which NoSQL type is best for highly connected data such as social networks?AGraph databaseBDocument storeCColumn storeDKey-value storeView AnswerDiscussWorkspaceReportSaveEasy
13Which is a typical reason to choose a NoSQL database?AHorizontal scaling with flexible schemasBComplex multi-table joinsCSmall fixed datasetsDStrict ACID transactions across many tablesView AnswerDiscussWorkspaceReportSaveEasy
14HBase is modelled on Google's:AMapReduceBBigtableCDremelDSpannerView AnswerDiscussWorkspaceReportSaveEasy
15MongoDB stores documents in a binary format called:AXMLBYAMLCBSONDCSVView AnswerDiscussWorkspaceReportSaveEasy