For the benefit of community, Please feel free to add/request anything that hasnt been covered. Please remember this is beginners guide and not a expert level documentation.
/Flume: contains notes and examples of apache flume/Hive: contains notes and examples of apache hive/MySQL: code sample containing peices to create db, create table and load data in mysql/Sqoop: contains notes and examples of import/export using sqoop/spark: contains notes,documentation, sample example(s) of spark APIs
/exam: sample cca-175 exam questions and solutions (in solution branch)/problem1- complex data structure handling using hive. (exposure to Hive,create table,LOAD,named_struct,struct)/problem2- Stock data analysis. (exposure to : json file handing, SparkSQL,map,reduce,filter,join,groupByKey,keyBy,UDFs etc)/problem3- MovieLens database analysis/problem4- Lahman's baseball database analysis/problem5- Hortonworks certification sample. Total 10 tasks ./Tweeter- Tweeter data analysis/problem6- Retail database sample excercises