Linux
practice.

Which is the only partition mounted in Single user mode

Which one of the following statement is true about variables in shell?

Which command is used to view compressed text file contents

What is the output of this program?

#include<stdio.h>
#include<stdlib.h>
#include<unistd.h>
 
int main()
{
    pid_t child;
    int a, status;
    a = 10;
    child = fork();
    switch(child){
        case -1 :
            perror("fork");
            exit(1);
        case 0 :
            printf("%d\n",a);
            break;
        default :
            wait(&status);
            break;
    }
    return 0;
}

* Specifies

Which one of the following is not a valid operator in bash shell?

In awk program, the name of the array can not be same with the

The command "as -o example.o example.s" will

Which one of the following is a notification to user space from the kernel that something has changed in the system's configuration?

What is the command to set the execute permissions to all the files and subdirectories within the directory /home/user1/direct

The command 'disown -r'

What is the output of this program?

#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("%d\n",fd);
    return 0;
}

Which one of the following provides all dependencies in the makefile?

Which command shows all the abbreviations in vi editor?

Which file of the proc filesystem can be used instead of "syslog" system call to read kernel messages?

What 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;
    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;
}

What is the the response of this server for this client if both programs are running on the same system?

/*This is server.c*/ 
#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);
    }
   add_server.sin_family = AF_INET;
   add_server.sin_port = htons(4001);
   add_server.sin_addr.s_addr = inet_addr("127.0.0.1");
   len = sizeof(add_server);
   len = sizeof(add_client);
   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_client,&len_client);
    if(fd_client == -1)
        perror("accept");
    read(fd_client,buff,10);
    return 0;
}
/*This is the client.c*/
#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("127.0.0.1");
    len = sizeof(add_server);
    fd  = connect(fd_client,(struct sockaddr*)&add_server,len);
    if(fd == -1)
    perror("connect");
    write(fd,"Hello\n",6);
    return 0;
}

RSTART is set by invoking the

What is the output of this program?

#include<stdio.h>
#include<sys/socket.h>
int main()
{ 
    int ret;
    ret = shutdown(0,0);
    printf("%d\n",ret);
    return 0;
}

The GDB command "info local"