My Experience with OpenSource Projects PART-1:

I finished my BE computer science and Engineering during the year 1999. I joined in Dishnet DSL (Now acquired by Tata Telecom) as a programmer trainee.

Dishnet was an ISP(Internet service provider). That time Dishnet was the only ISP running their entire technology stack in Microsoft technologies.Microsoft was also very proud about that.

I was developing web applications in classical ASP, SQL Server etc. I was also involved in various integration projects at Dishnet. Dishnet was running a language portal site www.ambalam.com. Writer Sujatha was the adviser of the website.Since am passionate about language computing, I volunteered to test windows 2000 language support. With that I got introduced to Writer Sujatha. I started working on ambalam.com project as well as other networking projects. Eventually I took over the entire maintenance of www.ambalam.com. I managed the entire technical team of ambalam.com.

While managing ambalam.com I got opportunity to explore linux technologies. Out of my own interest I got Manderak CD from IIT Madras and installed Linux.

The entire localization of linux was started by NRI's and I got interest and wanted to see the linux tamil desktop. I got the contact of Ma.Sivakumar(he was doing business in China). Shiva is a good mentor and language enthusiast.With his help I was able to see Linux in Tamil with few resource string translated. On seeing tamil in OS I was really excited and decided to contribute to Linux localization effort. 

I was translating few files and proof reading few and I felt it doesn't scale. I felt that this project needs a big push to complete all translations and see the desktop completely in Tamil. We decided to show the current status to Writer Sujatha to get more support.

We went to his house and showed the desktop. He said he will support our effort as well as help in translation, coining words etc(Kalai chollakkam).First phase we decided to translate A Desktop (KDE), A Browser(FireFox) and An office application (Open Office) and create a separate Linux distribution.

….My Experience will continue

Single Sign-on With Ping Identity

Ping identity establishes the Identity Bridge for in-bound and out-bound Identity management. It also enables Single Sign-on, federated identity management, mobile identity security, API security and social identity integration.

Configure:
Configuration is straight forward and can be completed in less than an hour.  

Download the trial version of their product.  If you know your company network very well, it is easy to configure and implement SSO in any project.

The communication between authendication service, ping federate and target application is very simple.

Steps:

1. Configure Server
2. Configure Adapter
3. Configure Connector
4. Get the partner id and target URL.
5. Frame end point URL(eg https://localhost:9031/sp/startSSO.ping?PartnerIdpId=<CONNECTOR NAME>&TargetResource=<APPLICATION URL>)
6. Implement your integration code based on the language of the website or application.

Yes, straight forward integration with less coding effort!

At first, I started reverse engineering their sample, but it took more time.  Having ping federate in local machine will help in terms of getting the API and resolving unknowns.

Have fun with SSO!

Open Source Tamil m-Learing Learning Management System

Tamil, which is a classical language, is my mother tongue.  I am passionate about my language.  I am a volunteer teacher at California Tamil Academy teaching Tamil to the younger generation kids.  I have been teaching Tamil for the last 3 years.

In my past, I have contributed a lot to Open Source software.  My area of interests are Language computing, Localization, Internationalization, etc.

Last year, the INFITT 2012 was held at Chidambaram, Tamil Nadu between Dec 28-30, 2012.  I wanted to submit an abstract to this conference.  I joined hands with Keshava Rangarajan and Arivoli Tirouvingadame, and we three submitted a paper for this conference.  It got accepted.

Here is the paper published in INFITT 2012 conference:
Kalvi: An Adaptive mLearning System

Oracle PSR Interview questions continued

http://www.oracle.com

Oracle PSR Interview questions:

1) Process states (Kernal and User process in running and waiting state)
2) Interrupts
3) Web Server performance tuning
4) Valid XML and Invalid XML
5) SQL server:  How would you handle WHERE condition in non index column in terms of performance tuning ?
6) XML parsing:  DOM processor memory or CPU issue
7) Linx command to find memory info and processor info 
8) IIS web server performance tuning
9) SOUNDEX in SQL server
10) Public key and Private key in encryption concept
11) What is Amdahl's law ?
12) How will you performance tune a website ?
13) How will you utilize CPU in a situation where increasing the load doesn't increase the CPU utilization and the application is very slow.  (Thread pool - increase)
14) Thread, Mutex, Semaphore.
15) Sealed class and abstract class
16) What is JDBC connection pool ?  Advantage and disadvantage of the connection pools
17) Race condition in java
18) Process vs Thread
19) Program vs Process
20) What is Critical section ?

Oracle PSR Interview questions

http://www.oracle.com

1. JVM performance optimization (Multi-threading, perm gen, young gen, etc.)
2. DB performance optimization (AWR reports, indexing, caching etc.)
3. Web performance optimization (fine tuning, optimizing, etc.)
4. Design patterns
5. SQL coding exercise on white board.
6. There was a puzzle and analytical question as well.

HP Interview Questions

Skill sets:  C#, Oracle Developer

1) What is sealed class ?
2) Difference between ref, in and out parameters
3) Abstract class and override
4) Performance tuning of Oracle stored procedures
5) Difference between various bindings in WCF Services.

Miscellaneous Interview questions

1) How will you secure Web Service ?
2) Why System.object is base class in .NET frame work ?
3) Is it possible to pass HTTP header in your SOAP Service ?
4) What is the advantage of using Razor engine in MVC3 framework ?
5) What is MVVM ?