Consider a program that reads data from an input file named in.dat, performs calculations, and outputs the results to a file named result. out.
A. What would happen if the file in. dat did not exist before the program is executed?
B. What are the contents of the file in. dat after the execution of the program?
C. What would happen if the file result. out did not exist before the program is executed?
D. What could happen if the output file was not closed at the end of the execution?