C++ questions

Question 2 A sequence of characters from the source to the destination: stream variable common output data type output stream None of these. Question 5 To use cin and cout a C++ program must use the preprocessor directive istream cin include string include )iostream Question 16 To read data into a double type variable character reads the plus and minus sign (if any) and the digits and decimal point and stops when it finds a whitespace None of these the extraction operator >> the insertion operator cin