Linux
practice.

Which signal is generated when we press ctrl-Z?

Which of the following enables multi-tasking in UNIX?

From where would the read statement read if the following statements were executed?

exec < file1
exec < file2
exec < file3
read line

Which file shows the parameter passed to kernel at the time of starting?

In GCC compiler, "-shared" option is given to create the shared library with

What is temporary breakpoint?

What is the output of this program?

#include<stdio.h>
#include<sys/time.h>
#include<sys/resource.h>
 
int main()
{
    struct rlimit limit;
    limit.rlim_cur = 10;
    if(setrlimit(RLIMIT_NOFILE,&limit) != 0)
        perror("setrlimit");
    return 0;
}

What is the command that can print lines of first file matching with second file?

Given a code snippet below?

#define PERMS  (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)
int main() 
{
    int fd1, fd2;
    umask(0);
    fd1 = open(“file1”, O_CREAT | O_RDWR, PERMS)
    umask(S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH);
    fd2 = open(“file2”, O_CREAT | O_RDWR, PERMS)
    return 0;
}

The newly created files file1 and file2 will have the permissions respectively

What is the output of this program?

#include<stdio.h>
#include<pthread.h>
 
int a;  
void *fun_t(void *arg);
void *fun_t(void *arg)
{       
    printf("%d\n",a);
    pthread_exit("Bye");
}
int main()
{
    pthread_t pt;
    void *res_t;         
    a = 10;
    if(pthread_create(&pt,NULL,fun_t,NULL) != 0)
        perror("pthread_create");
    if(pthread_join(pt,&res_t) != 0)
        perror("pthread_join");
    return 0;
}

While debugging with GDB

The "step" command of GDB

The command "mknod myfifo b 4 16"

Which file contains the filesystems to be automatically mounted during boot?

A system has 512MB of physical memory. Which among the following is not a suitable virtual memory size for this system architecture?

With the help of proc filesystem

What does chmod +t do?

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, 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;
}

Which of these is not a Unix Flavor?

The directory /sys/block contains