1-C-Obj-3.3

1. What does argc represent in a C program that uses command-line arguments?

(A) Argument value
(B) Array of strings
(C) Argument count
(D) Array of integers

Correct Answer: (C) Argument count

2. What is stored in argv[0] when a C program is executed with command-line arguments?

(A) The first argument passed to the program
(B) The second argument passed to the program
(C) The number of arguments passed
(D) The program’s name

Correct Answer: (D) The program’s name

3. How would you compile and run a C program that uses command-line arguments?

(A) gcc program.c -run program arg1 arg2
(B) gcc program.c -output program arg1 arg2
(C) gcc program.c -o program; ./program arg1 arg2
(D) gcc program.c -execute program arg1 arg2

Correct Answer: (C) gcc program.c -o program; ./program arg1 arg2

4. If a program is executed as ./program arg1 arg2 arg3, what will be the value of argc?

(A) 1
(B) 3
(C) 4
(D) 5

Correct Answer: (C) 4

5. In the command-line argument example provided, what does the atoi function do?

(A) Converts a string to a character
(B) Converts a string to an integer
(C) Converts an integer to a string
(D) Converts a string to an array

Correct Answer: (B) Converts a string to an integer

6. Which of the following commands is used to create a new directory in the command line?

(A) DIR
(B) MD
(C) CD
(D) CLS

Correct Answer: (B) MD

7. In the context of command-line arguments, which of the following is correct for char *argv[]?

(A) It is a string variable that holds the number of arguments.
(B) It is an integer that counts the number of arguments.
(C) It is an array of pointers to strings representing arguments.
(D) It is an array of integers representing arguments.

Correct Answer: (C) It is an array of pointers to strings representing arguments.

8. What will be the output of the following program if executed as ./program 10 20?


            #include <stdio.h>
            #include <stdlib.h>
            int main(int argc, char *argv[]) {
                int num1 = atoi(argv[1]);
                int num2 = atoi(argv[2]);
                int sum = num1 + num2;
                printf("Sum: %d\n", sum);
                return 0;
            }

(A) Sum: 1020
(B) Sum: 30
(C) Sum: 15
(D) Sum: 0

Correct Answer: (B) Sum: 30

9. Which of the following commands is used to clear the terminal screen?

(A) COPY
(B) CLS
(C) CD
(D) MD

Correct Answer: (B) CLS

10. In a program using command-line arguments, what does the first argument (argv[0]) always contain?

(A) The first user-provided argument
(B) The program’s name
(C) The second user-provided argument
(D) The total number of arguments

Correct Answer: (B) The program’s name

3.3 - Command Line Arguments.

3.1.1 - Overview of command Line Arguments