TCS NQT Command Line Arguments Quiz– 1

The correct syntax for the command line arguments is int main(int var, char *argv[]).

The first parameter will contain the number of arguments i.e argument count and the second parameter is the number of arguments inside an argument vector.

EXPLANATION :

argv(Argument Vector) is array of character pointers listing all the arguments. If argc is greater than zero,the array elements from argv[0] to argv[argc-1] will contain pointers to strings. Argv[0] is the name of the program , After that till argv[argc-1] every element is command -line arguments.

 

EXPLANATION :

The number of command-line arguments the program was invoked with

EXPLANATION :

Here argc means argument count

It is equivalent to the number of parameters passed plus one to include the name of the program that was executed to get those process running. Thus, argc is always greater than zero.

 

 

EXPLANATION :

Jagged array is generally generated in Command -line argument.

A jagged array is an array of arrays such that member arrays can be of different sizes, i.e., we can create a 2-D array but with a variable number of columns in each row. These types of arrays are also known as Jagged arrays.

EXPLANATION :

The maximum length of the command-line arguments including the spaces may vary from one OS to another.

Moreover, The maximum length of the string that you can use at the command prompt is 8191 characters. This limitation applies to the command line.

EXPLANATION :

Array index starts always starts with 0 in most of the programming language.Even during iteration process to fetch any array value,the iteration starts with 0 and ends at n-1.

So this rule is same for command line argument,so the last argument would be argc-1.

EXPLANATION :

argv[0] and argv[1], denotes the name by which the program was invoked and Pointer to the 1st argument.

EXPLANATION :

Here argv[1], argv[2] and argv[3] are string type. We have to convert the string to integer type before perform arithmetic operation.
Example: j = atoi(argv[1]) + atoi(argv[2]) + atoi(argv[3]);

So, This code will generates an error.