Correct Answer : using
Explanation :
namespace A{ int a = 5;} namespace B{ int a = 10;} using namespace A; cout<<a; // will print value of a from namespace A. using namespace B; cout<<a; // will print value of a from namespace B.
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.