Hello Sir

I am planning to appear CCA-175 certification exam. I have few questions. I appreciate if someone clarify me.

If we have problem that is related to RDD, are we able to solve that problem by using data frame instead of RDD?
Suppose we have a keyvalue pair (K,V) file in RDD and we convert that into DF and solved the issue. buy while saving as TextFile i converted it as RDD and saving is showing as [K,V] instead of (K,V). Is that matters?

Did any one get the spark streaming problem recently?