C
Explanation:
https://www.sciencedirect.com/science/article/pii/S2405844019356750
Answer:
This is the complete correct program:
#include <stdio.h>
#include<sys/types.h>
#include<unistd.h>
int value = 128;
int main()
{
pid_t pid;
pid=fork();
if (pid==0) /* child process */
{
value +=8;
return 0; }
else if (pid > 0) {/* parent process */
wait (NULL);
printf ("PARENT: value =%d\n" ,value); /* LINEA */
return 0;
}
}
The output of the LINE A is:
PARENT: value = 128
Explanation:
The fork() function used in the program creates a new process and this process is the child process. The child process is same as the original process having its own address space or memory.
In the child process the value of pid is 0. So the if condition checks if pid==0. Then the child process adds 8 to the value of its variable according to the following statement
value +=8;
Now the original process has value = 128. In else if part the parents process has the value of pid greater than zero and this portion of the program is of the parent process :
else if (pid > 0)
{ wait (NULL);
printf ("PARENT: value =%d\n" ,value);
return 0; }
So the value 128 is printed at the end in the output.
wait(NULL) is used to wait for the child process to terminate so the parent process waits untill child process completes.
So the conclusion is that even if the value of the variable pid is changed in the child process but it will not affect the value in the variable of the parent process.
Answer:
The solution code is written in Python 3.
- def processCSV(CSV_string, index):
- data = CSV_string.split(",")
- result = data[index]
- return int(result)
-
- processCSV('111,22,3333,4', 2)
Explanation:
Firstly, create function and name it as <em>processCSV()</em> with two parameters, <em>CSV_string</em> and <em>index</em> (Line 1).
Since the CSV_string is a collection of integers separated by comma, we can make use of Python String built-in method <em>split() </em>to convert the <em>CSV_string </em>into a list of numbers by using "," as separator (Line 2).
Next, we can use the <em>index</em> to extract the target value from the list (Line 3).
Since the value in the list is still a string and therefore we shall use Python built-in method int() to convert the target value from string type to integer and return it as output of the function (Line 4)
We can test our function by using the sample test case (Line 6) and we shall see the expected output: 3333.
A.External Monitor.Hope I helped.
