⟩ How to enable a service at a particular run level?
We can enable a service using the Command 'chkconfig <Service-Name> on -level 3′
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More Questions for you:
Assemble code of the program can be displayed in GDB by the command a) disassemble b) assemble c) assembly d) none of the mentioned
The execution of the program in GDB can be affected by a) arguments b) working directory c) environment d) all of the mentioned
What is the output of this program no 9?
#include<stdio.h>
#include<sys/types.h>
#include<sys/socket.h>
int main()
{
struct sockaddr_in addr;
int fd;
fd = socket(AF_INET,SOCK_STREAM,0);
printf("%dn",fd);
return 0;
}
a) -1
b) 3
c) error
d) none of the mentionedWhat is the output of this program?
#include<stdio.h>
#include<stdlib.h>
#include<netinet/in.h>
#include<sys/types.h>
#include<sys/socket.h>
int main()
{
int fd_server, fd_client, len, len_client;
struct sockaddr_in add_server, add_client;
char buff[10];
fd_server = socket(AF_INET,SOCK_STREAM,0);
if (fd_server == -1){
perror("fd_sock");
exit(1);
}
len = sizeof(add_server);
len_client = sizeof(add_client);
if( bind(fd_server,(struct sockaddr*)&add_server,len) != 0)
perror("bind");
fd_client = accept(fd_server,(struct sockaddr*)&add_client,len_client);
if(fd_client == -1)
perror("accept");
read(fd_client,buff,10);
return 0;
}
a) segmentation fault
b) error at the time of compilation
c) syntax error
d) none of the mentionedThis program can send the request to
#include<stdio.h>
#include<netinet/in.h>
#include<sys/types.h>
#include<sys/socket.h>
int main()
{
int fd_client,fd, len;
struct sockaddr_in add_server;
fd_client = socket(AF_INET,SOCK_STREAM,0);
if (fd_client == -1){
perror("fd_sock");
exit(1);
}
add_server.sin_family = AF_INET;
add_server.sin_port = ntohs(4001);
add_server.sin_addr.s_addr = inet_addr("193.39.0.4");
len = sizeof(add_server);
fd = connect(fd_client,(struct sockaddr*)&add_server,len);
if(fd == -1)
perror("connect");
return 0;
}
a) the system having IP address 193.39.0.4
b) any system present in the network
c) any system of the private network
d) none of the mentionedThis program is valid for
#include<stdio.h>
#include<netinet/in.h>
#include<sys/types.h>
#include<sys/socket.h>
int main()
{
int fd_client,fd, len;
struct sockaddr_in add_server;
fd_client = socket(AF_INET,SOCK_STREAM,0);
if (fd_client == -1){
perror("fd_sock");
exit(1);
}
add_server.sin_family = AF_INET;
add_server.sin_port = ntohs(4001);
add_server.sin_addr.s_addr = inet_addr("144.29.8.2");
len = sizeof(add_server);
fd = connect(fd_client,(struct sockaddr*)&add_server,len);
return 0;
}
a) IPv4
b) IPv6
c) both (a) and (b)
d) none of the mentionedWhat is the output of this program?
#include<stdio.h>
#include<sys/socket.h>
int main()
{
int ret;
ret = shutdown(0,0);
printf("%dn",ret);
return 0;
}
a) 0
b) -1
c) can not be determined
d) none of the mentionedWhat is the problem with this server program?
#include<stdio.h>
#include<stdlib.h>
#include<netinet/in.h>
#include<sys/types.h>
#include<sys/socket.h>
int main()
{
int fd_server, fd_client, len;
struct sockaddr_in add_server;
fd_server = socket(AF_INET,SOCK_STREAM,0);
if (fd_server == -1){
perror("fd_sock");
exit(1);
}
add_server.sin_family = AF_INET;
add_server.sin_port = htons(4001);
add_server.sin_addr.s_addr = inet_addr("122.23.1.1");
len = sizeof(add_server);
if( bind(fd_server,(struct sockaddr*)&add_server,len) != 0)
perror("bind");
if(listen(fd_server,5) != 0)
perror("listen");
fd_client = accept(fd_server,(struct sockaddr*)&add_server,&len);
if(fd_client == -1)
perror("accept");
return 0;
}
a) it can not accept the request of any client
b) it will give the segmentation fault
c) there is no problem with this program
d) none of the mentWhat is the output of this program no 10?
#include<stdio.h>
#include<stdlib.h>
#include<netinet/in.h>
#include<sys/types.h>
#include<sys/socket.h>
int main()
{
int fd_server, fd_client, len, len_client;
struct sockaddr_in add_server;
fd_server = socket(AF_INET,SOCK_STREAM,0);
fd_client = accept(fd_server,(struct sockaddr*)&add_server,&len);
if(fd_client == -1)
perror("accept");
if(listen(fd_server,5) != 0)
perror("listen");
return 0;
}
a) syntax error
b) error at the time of compilation
c) segmentation fault
d) none of the mentionedWhat is the output of this program no 11?
#include<stdio.h>
#include<stdlib.h>
#include<netinet/in.h>
#include<sys/types.h>
#include<sys/socket.h>
int main()
{
int fd_server, fd_client, len, len_client;
struct sockaddr_in add_server;
fd_server = socket(AF_INET,SOCK_STREAM,0);
close(fd_server);
perror("accept");
if(listen(fd_server,5) != 0)
perror("listen");
fd_client = accept(fd_server,(struct sockaddr*)&add_server,&len);
if(fd_client == -1)
return 0;
}
a) syntax error
b) error at the time of compilation
c) segmentation fault
d) none of the mentioned
