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agasfer [191]
3 years ago
10

Switched backbone networks:_____.a. always use a ring topology.b. require much more management that do routed backbone networks.

c. use a star topology with one device, usually a switch.d. are the least common type of BN used in one building.e. switch the traffic based on layer 3 addresses.
Computers and Technology
1 answer:
Gre4nikov [31]3 years ago
7 0

Answer:

c

Explanation:

spongo  

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Write a parent program to fork(2) n processes where n is passed tothe program on the command line, and n can be from 1 to 10. Al
MrRissso [65]

Answer:

Complete code is given below:

Explanation:

#include <stdio.h>

#include <sys/types.h>

#include <unistd.h>

#include <time.h>

#include <sys/wait.h>

int main(int argc , char *argv[]){

pid_t mypid, childpid;

int status;

int i,n;

time_t t;

     

mypid = getpid();

printf("pid is %d.\n", mypid);

childpid = fork();

if ( childpid == -1 ) {

perror("Cannot proceed. fork() error");

return 1;

}

 

 

if (childpid == 0) {

 

 

mypid = getpid();

 

 

childpid = fork();

if ( childpid == -1 ) {

perror("Cannot proceed. fork() error");

return 1;

}

 

if (childpid == 0) {

 

mypid = getpid();

printf("Child pid is %d.\n", getppid());

 

childpid = fork();

 

 

if ( childpid == -1 ) {

perror("Cannot proceed. fork() error");

return 1;

}

random((unsigned) time(&t));

printf(" parent id = %d : Random = %d\n",mypid , (int)(random()% 100 +1));

printf("child id = %d : Random = %d\n",getpid , (int)(random()% 100 +1));

 

if (childpid == 0) {

 

printf("Child 2: I hinerited my parent's PID as %d.\n", mypid);

 

mypid = getpid();

printf("Child 2: getppid() tells my parent is %d. My own pid instead is %d.\n", getppid(), mypid);

 

sleep(30);

return 12;

} else return 15;

} else {

 

while ( waitpid(childpid, &status,0) == 0 ) sleep(1);

 

if ( WIFEXITED(status) ) printf("Child 1 exited with exit status %d.\n", WEXITSTATUS(status));

else printf("Child 1: child has not terminated correctly.\n");

}

} else {

printf(" fork() is ok and child pid is %d\n", childpid);

wait(&status);

 

if ( WIFEXITED(status) ) printf(" child has exited with status %d.\n", WEXITSTATUS(status));

else printf(" child has not terminated normally.\n");

}

 

return 0;

}

Output:

pid is 24503.

Child   pid  is 24565.

parent id = 24566 : Random = 87

child id = 1849900480 : Random = 78

pid is 24503.

Child 1  exited with exit status 15.

pid is 24503.

fork() is ok and child pid is  24565

child has exited with status 0.

6 0
3 years ago
What is wrong with each of the following?
ankoles [38]

Answer:

The answer to this question is given below in the explanation section

Explanation:

shoNum + shoNum2 = shoTotal

in this code statement,  the order of operation is wrong because the calculation in programming always done at the right side of dependent variables.  so the correct statement of code is

<em> shoTotal = shoNum + shoNum2;</em>

shoNum = 10 * 4

This statement is programmatically correct, because the ShoNum value becomes 40 after performing the multiplication operation on its assigned value  (10 multiply by 4). However, it is noted that the empty space mostly ignored by the compiler. So, the correct is <em>shoNum = 10*4;</em>

Dim decPrice As Decimal = "$4.99"

The dollar sign is appeared in along with its value. So, if you assign value to a decimal variable, you need to assign only digit value (do not mix value with symbol or text) and also do not put quotation marks around value, if you put quotation marks around value then this value will be consider as a text value.

So, the correct statement is :

<em>Dim decPrice As Decimal = 4.99;</em>

shoCube= (shoSide)3

In this statement, cube is calculated of shoSide variable, mathematically it is right, but programmatically it is incorrect. Because, you missed the multiplication operation (*) between the operand shoSide and 3. it should

be as  shoSide raise to power 3.

the correct statement is : shoCube = (shoSide * shoSide *shoSide);

4 0
3 years ago
How to reinstall windows 7 on my pc,without format,because i don't want to loose my data,and can u give me a windows 7 setup ple
Tems11 [23]
You could install it from a flash drive a disk.
5 0
3 years ago
Look at the following structure declaration.
myrzilka [38]

Answer:

B. a tag

Explanation:

In the structure definition given below:

struct Employee

{

string name;

int idNum;  

};

Employee corresponds to the tag of the structure. The tag is used to create additional instances of the structure. For example:

struct Employee e1;

struct Employee e2;

name and idNum are members of the Employee structure and are referenced using the dot notation. e.g.,

struct Employee e1;

e1.idNum=1;

7 0
3 years ago
The process of converting information, such as text, numbers, photos, or music, into digital data that can be manipulated by ele
SCORPION-xisa [38]

Answer:

The process of converting information, such as text, numbers, photos, or music, into digital data that can be manipulated by electronic devices is called Digitization

Explanation:

It is the process of converting “information in to a digital form”. Here the information are organized into bits. Mostly these data will be converted into the form of image. But these can be edited by converting once again into necessary format and even back to image too. There are specific tools which the user needs to install for editing the digital documents.

The reason why we need digitization is that

a) We want to convert hard copy into soft copy and store it in system.  

b) We would like to edit the data in the hard copy and preserve as a fresh copy.

4 0
3 years ago
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