Question

Q: If a program is invoked with "python program.py -r input.dat output.dat", what are the elements of argv?

There are four choices:

A. argv[0]: "-r input.dat output.dat"

B.argv[1]: "-r"
argv[2]: "input.dat"
argv[3]: "output.dat"

C.argv[0]: "program.py"
argv[1]: "-r"
argv[2]: "input.dat"
argv[3]: "output.dat"

D.argv[0]: "-r"
argv[1]: "input.dat"
argv[2]: "output.dat"

Answer 1

C

Step-by-step explanation:

C.argv[0]: "program.py"

argv[1]: "-r"

argv[2]: "input.dat"

argv[3]: "output.dat"

is the right answer. as 0 argument is always the script. We can find this by importing sys and using the command sys.argv. And like len(sys.argv) will give total number of arguments.