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Which of the following is true about DataFrame?

(i)DataFrame API have provision for compile time type safety and DataFrames provide a more user-friendly API than RDDs.

(ii)DataFrame API have provision for compile time type safety.

(iii)DataFrames provide a more user-friendly API than RDDs.

(iv)None of the options
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DataFrames provide a more user-friendly API than RDDs.  is corect 

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