1. sql/Solution_1_VotesRank.sql
2. sql/Solution_2_initcap.sql
3. sql/Solution_3_splitColumnToRow.sql
4. sql/Solution_4_bugtracking.sql

1. Solution 1 : java/StringUtils.java 
2. Solution 2 : java/ArraysComplementary.java
3. Solution 3 : java/FileHandling.java