Computers and Technology, 11.06.2020 06:57 haleyrene2663
Two of the most fundamental functions for dealing with interprocess communication are read() and write(). Consider the following otherwise valid C program:int r, pipeFDs[2];
char message[512];
pid_t spawnpid;
pipe(pipeFDs);
spawnpid = fork();
switch (spawnpid)
{
case 0:
close(pipeFDs[0]); // close the input file descriptor
write(pipeFDs[1], "hi process, this is the STUFF!!", 21);
break;
default:
close(pipeFDs[1]); // close output file descriptor
r = read(pipeFDs[0], message, sizeof(message));
printf("Message received from other: %s\n", message);
break;
}
Select each of the following answers that is correct. CAN BE MULTIPLE CHOICES...
(1) The read() call may block until data becomes available
(2) When the read() call returns, this one call will return all of the data that was sent through the pipe, which is different behavior than if this was a socket
(3) If the read() call blocks, the process will be suspended until data arrives
(4) The write() call will return before all of the data has been written, if the corresponding read() call blocks mid-transfer
(5) Pipes can fill, which will cause the write() call to block until the read() call is able to read data from the pipe
Answers: 1
Computers and Technology, 23.06.2019 21:20
For positive constants a and b, the force between two atoms in a molecule is given f(r) = βa r2 + b r3 , where r > 0 is the distance between the atoms. note: a and b are upper case letters. (a) find f '(r) = (b) find the critical point for f(r). r = (c) find f ''(r) = (d) find the value of r so that f ''(r) = 0.
Answers: 1
Computers and Technology, 24.06.2019 00:00
Visualizing a game of βtagβ to remember the meaning of contagious
Answers: 3
Computers and Technology, 24.06.2019 07:30
Consider the folloeing website url: what does the "http: //" represent? a. protocal identifier. b. ftp. c. domain name d. resource name
Answers: 2
Two of the most fundamental functions for dealing with interprocess communication are read() and wri...
Mathematics, 02.08.2019 04:10
Mathematics, 02.08.2019 04:10
Biology, 02.08.2019 04:10
Mathematics, 02.08.2019 04:10