Linux
practice.

To increase the response time and throughput, the kernel minimizes the frequency of disk access by keeping a pool of internal data buffer called

What is the output of this program?

#include<stdio.h>
#include<fcntl.h>
 
int main()
{
    int fd, count;
    char ch[10];
    fd = open("example.txt",O_RDWR|O_CREAT);
    write(fd,"linux",5);
    lseek(fd,2,SEEK_END);
    write(fd,"man",3);
    lseek(fd,0,0);
    count = read(fd,ch,10);
    printf("%s\n",ch);
    return 0;
}

Default action of SIGSEGV is

To open a file file1 with cursor at line number 4

Which sed command deletes the specified address range

What is the output of this program?

#include<stdio.h>
 
int main()
{
    int fd[3],count;
    if (pipe(fd) != 0)
        perror("pipe");
    count = write(fd[2],"Hello",6);
    printf("%d\n",count);
    return 0;
}

Which GDB command can be used to put a breakpoint at the beginning of the program?

Which is the core of the operating system?

Which command is used to display the operating system name

Which one of the following function is used to add the kobject to sysfs?

Monolithic kernel

Which gcc option reports the cpu time taken by each subprocess in the compilation sequence?

Semaphore P( ) operation usually does the following:

What is the output of this program?

#include<stdio.h>
#include<unistd.h>
 
int main()
{
    pid_t child;
    child = fork();
    printf("%d\n",child);
    return 0;
}

What is the default number of files open per user process?

Which command is used to set terminal IO characteristic?

Which command concatenate the specified argument into a single command, then execute the command?

What 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;
}

Executing the 'cd ..' command when at the root level causes

What is the output of this program?

#include<stdio.h>
#include<sys/types.h>
#include<sys/un.h>
#include<sys/socket.h>
#include<errno.h>
 
int main()
{
    struct sockaddr_un addr;
    int fd;
    fd = socket(AF_UNIX,SOCK_STREAM,0);
    if (fd == -1)
        perror("socket");
    addr.sun_family = AF_UNIX;
    strcpy(addr.sun_path,"demo_sock");
    if (bind(4,(struct sockaddr*)&addr,sizeof(addr)) == -1)
        printf("Example\n");
    return 0;
}