Answer:
Hi DancingGrace! The issue with the code is that it is trying to extend multiple classes which is not a feature in Java programming.
Explanation:
The extends keyword allows a class to use the attributes and properties of the base class it is extending and add more features and properties into it's own class. This is useful in programming where different models share similar properties but are slightly different. An example would be designing a class for Car and Bike. Both have some similar properties like wheels, engine, etc, however they are different forms of transport. A useful implementation would be to define a class called Vehicle with similar attributes, and have the Car and Bike extend it.
The answer is yes hope this helps did before
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:
A matrix can only be added to (or subtracted from) another matrix if the two matrices have the same dimensions.
Explanation:
Subtracting matrices Similarly, to subtract matrices, we subtract the corresponding entries. For example, let's consider C = [ 2 8 0 9 ] C=\left[\begin{array}{rr}{2} &8 \\ 0 & 9 \end{array}\right] C=[2089] and D = [ 5 6 11 3 ] D=\left[\begin{array}{rr}{5} &6 \\ 11 & 3 \end{array}\right] D=[51163].
Answer:
For setting up workstations in classrooms, one end of cables connected into the built in NIC and other end will be connected to a drop.
Explanation:
A drop will be used for connectivity in this case, which will work as connection point in a network. Drops are just like outlets in wall having Ethernet Jacks where a network device or system can be plugged into it.
