See if the passwords for Oracle 11g database users are case sensitive

Connect to data with sys user sqlplus:

Sql*plus:release 11.2.0.3.0 Production on Thu June 22 11:07:58 2017

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Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0-64bit Production
With the partitioning, Oracle Label Security, OLAP, Data Mining,
Oracle Database Vault and Real application testing options

Sql> Show parameter Sec_case_sensitive_logon;

NAME TYPE VALUE
------------------------------------    -----------     ------------------------------
Sec_case_sensitive_logon Boolean TRUE

sql> ALTER SYSTEM SET sec_case_sensitive_logon = FALSE;

The system has changed.

Sql> Show Parameter Sec_case_sensitive_logon

NAME TYPE VALUE
------------------------------------      -----------     ------------------------------
Sec_case_sensitive_logon Boolean FALSE
Sql>

See if the passwords for Oracle 11g database users are case sensitive