How to know installed Oracle Client is 32 bit or 64 bit?

Question

OS: Windows 2008 Server R2

Oracle Client: 11.2

Many Thanks

Answer 1

For the Oracle 12.1 windows client, looking at the output from the TNSPING command seems to work:

With 32 bit installed on 64 bit OS:

C:>tnsping

TNS Ping Utility for 32-bit Windows: Version 12.1.0.2.0 - Production on 02-FEB-2 016 15:44:37

Copyright (c) 1997, 2014, Oracle. All rights reserved.

With 64 bit installed on 64 bit OS:

D:>tnsping

TNS Ping Utility for 64-bit Windows: Version 12.1.0.1.0 - Production on 02-FEB-2 016 16:00:23

Copyright (c) 1997, 2013, Oracle. All rights reserved.