How to check your JDBC Driver version

Go to WL_HOME\server\lib directory

Run below command

java -jar ojdbc6.jar

Note :- ojdbc6.jar is your jdbc driver file

you will get the output like below :-

Oracle 11.2.0.2.0 JDBC 4.0 compiled with JDK6 on Mon_Mar_21_22:57:28_PDT_2011
#Default Connection Properties Resource
#Sun Oct 07 15:12:16 IST 2012

Here my driver version is 11.2.0.2.0