Correct Answer : v.size()
Explanation : To get the number of elements stored in the vector v we use the function v.size(). It returns how many elements are currently in the vector excluding the void places.
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.