I have an app where it will display 10 dots with same color, now based upon some condition I want to change the color of one dot
Not 100% sure of what you are asking, but here is my guess.
I have a featurelayer called "operationsPointLayer" and in it's attributes table I have a field called "VERIFIED", it has 2 possible values Y or N. I draw the Y as green and N as red.
var recordRenderer = new UniqueValueRenderer(defaultSymbol, "VERIFIED");
recordRenderer.addValue("Y", new SimpleMarkerSymbol(SimpleMarkerSymbol.STYLE_CIRCLE, 8, null, new Color([0,204,0])));
recordRenderer.addValue("N", new SimpleMarkerSymbol(SimpleMarkerSymbol.STYLE_CIRCLE, 8, null, new Color([255,0,0])));
When I edit the data and change N to Y the points change color.
Or are you asking for the points to change color when selected in the map? In that case here is an example.
Retrieving data ...