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.
// Making a function that will take a integer as argument and return print the code
void Print(int statuscode){
// starting the switch statement on the interger sent
switch(statuscode)
case 200: // for case 200
cout << "Ok,Fullfilled"<< endl;
case 403: // for case 403
cout << "Forbidden" << endl;
case 404: // for case 404
cout << "Not Found" <<endl;
case 500: // for case 500
cout << "Server Error "<< endl;
default: // default case
cout << " Wrong code"<<endl;
}
Answer:
Option D. float is the correct answer.
Explanation:
Decimal number contains decimal point. Out of all the given data types, float data type store the number with decimal point.
As the number has to be further used for calculations float ahs to be used. Because the numbers can also be stored in string but cannot be used for further calculations.
Hence,
Option D. float is the correct answer.
Answer: C) Motion detectors
Explanation:
Motion detectors is the device that is used for detection of moving object in any area. They are used for security purposes by tracking motion or people and alerting the user.It consist of motion sensor for detection of motion and alerting the users or organization about security breach through alarming .
- According to the question,Chief information officer should implement motion detectors to investigate about theft that takes place in company's department on regular basis.Any intervention for company's loss will be alerted through tracking motion of the thief.
- Other options are incorrect because camera is used for recording videos and images. Bio-metric device is used for digital identification of any person to enter into a system. Man-trap is vestibule used for controlling access of a person for security.
- Thus, the correct option is option(C).
Black absorbs all visible parts of the spectrum turning that light energy into heat. The more it absorbs the more heat it emits.
