Correct Answer : fclose
Explanation : fclose() is used to close the file and flush it out of memory for safe closing of files opened during the execution of program. In short to avoid memory faults during the execution of the program.
Correct Answer : All of the above
Explanation : Any of the above signature can be used while using command line arguments in C++ programs
Correct Answer : argv[0]
Explanation : The first string in the list of command line arguments represents the name of the program which can be accessed by using argv[0].
Correct Answer : Number of command line arguments
Explanation : The first argument of the main() function represents the number of command line arguments that are passed.