21. Which tar command option is used to list the files in a tape archive format?
22. A . . . . . . . . is a higher level view of a device that abstracts out low level implementation details/
23. In vi editor, the key combination CTRL+f
24. What is the output of this program?
#include<stdio.h>
#inlcude<stdlib.h>
int main()
{
int *ptr;
double *ptr;
printf("%d\n",sizeof(ptr));
return 0;
}
#include<stdio.h>
#inlcude<stdlib.h>
int main()
{
int *ptr;
double *ptr;
printf("%d\n",sizeof(ptr));
return 0;
}25. The signal sent to a process when the Ctrl-C key is pressed is
26. BASH shell stands for?
27. What is the output of this program?
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<sys/types.h>
#include<sys/ipc.h>
#include<sys/msg.h>
struct data_st{
long int id;
char buff[11];
};
int main()
{
int m_id;
struct data_st data1, data2;
m_id = msgget((key_t)181,0666|IPC_CREAT);
if(m_id == -1)
perror("msgget");
data1.id = 1;
strcpy(data1.buff,"example");
if(msgsnd(m_id,&data1,11,0) == -1)
perror("msgsnd");
if(msgrcv(m_id,&data2,11,0) == -1)
perror("msgrcv");
printf("%s\n",data2.buff);
if(msgctl(m_id,IPC_RMID,0) != 0)
perror("msgctl");
return 0;
}
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<sys/types.h>
#include<sys/ipc.h>
#include<sys/msg.h>
struct data_st{
long int id;
char buff[11];
};
int main()
{
int m_id;
struct data_st data1, data2;
m_id = msgget((key_t)181,0666|IPC_CREAT);
if(m_id == -1)
perror("msgget");
data1.id = 1;
strcpy(data1.buff,"example");
if(msgsnd(m_id,&data1,11,0) == -1)
perror("msgsnd");
if(msgrcv(m_id,&data2,11,0) == -1)
perror("msgrcv");
printf("%s\n",data2.buff);
if(msgctl(m_id,IPC_RMID,0) != 0)
perror("msgctl");
return 0;
}28. What is the output of this progarm?
#include<stdio.h>
#include<unistd.h>
int main()
{
execl("/bin/ls","ls",NULL);
return 0;
}
#include<stdio.h>
#include<unistd.h>
int main()
{
execl("/bin/ls","ls",NULL);
return 0;
}29. GDB can be used for
30. In which condition this program will print the string "Example"?
#include<stdio.h>
#include<stdlib.h>
int main()
{
int *ptr;
ptr = (int *)malloc(sizeof(int)*10);
if (ptr == NULL)
printf("Example\n");
return 0;
}
#include<stdio.h>
#include<stdlib.h>
int main()
{
int *ptr;
ptr = (int *)malloc(sizeof(int)*10);
if (ptr == NULL)
printf("Example\n");
return 0;
}Read More Section(Linux)
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