Hi @Subramanyam -
In addition to what @bruno29a suggested, I would point out a couple of other things in the spirit of maintaining a helpful, healthy forum community.
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The KNIME Development forum is for questions about node development, the KNIME SDK, and so forth. It’s not for questions about which nodes to use, or how to build workflows for particular use cases. Those go in the main Analytics Platform forum, which gets lots more traffic anyway. (I have moved this and one of your other topics to the correct forum for you.)
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Please be respectful of other posters that are volunteering their time to help you. In particular, be judicious about tagging people in a post, as every time you do that they get a notification. If overused, it can come off as demanding or rude.
Following our guidelines helps make the forum a useful space for everyone 
Cheers!