Correct Answer : call by reference
Explanation : In the call by reference, it will just passes the reference of the memory addresses of passed values rather than copying the value to new memories which reduces the overall time and memory use.
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.