This survey conducted by DH/CNN-IBN predicts that 39% of the respondents said that they would vote for Congress, 28%for BJP and 20% for JDS. They also said that more than a third of the respondents said that they would change their minds and most of them belonged to BJP/JDS.
We know the credentials of Rajdeep Sardesai and the way he was made to eat his words by Narendra Modi. I am no fan of BJP but between Rajdeep and BJP, I would rather trust the latter.
As far as DH is concerned, the less said the better. It is a rabidly pro-congress paper. It may be okay as a news paper but useless for any other purpose.
In the final analysis, dump the whole survey that has no ground realities.