Linux
practice.

Filesystem for CDROM is:

One of the entry of /etc/passwd file is shown below:

user1:x:1111:2222:Example:/home/user1:/bin/bash

Which among the following will print userid and home dir in the following pattern “user1:/home/user1”

What is the output of the following program?

[ -n $HOME ]
echo $?
[ -z $HOME ]
echo $?

The file /proc/devices is the

Which of the following is true?

For debugging with GDB, the file "example" can be created with the command

On x86-32 Linux, at which address the code segment of the program starts?

Which one of the following string will print first by this program?

#include<stdio.h>
#include<pthread.h>
#include<semaphore.h>
 
sem_t st;
void *fun_t(void *arg);
void *fun_t(void *arg)
{
    printf("Linux\n");
    sem_post(&st);
    pthread_exit("Bye"); 
}
int main()
{
    pthread_t pt;
    void *res_t;
    if(pthread_create(&pt,NULL,fun_t,NULL) == -1)
        perror("pthread_create");
    if(sem_init(&st,0,0) != 0)
        perror("sem_init");
    if(sem_wait(&st) != 0)
        perror("sem_wait");
    printf("Example\n");
    if(pthread_join(pt,&res_t) == -1)
        perror("pthread_join");
    if(sem_destroy(&st) != 0)
        perror("sem_destroy");
    return 0;
}

Which one can be a real time schedule policy?

Most files and directories within /proc are 0 bytes in size because

The file /proc/locks displays the file currently locked by the

Which is the correct syntax for sed on command line?

In this program

#include<stdio.h>
#include<signal.h>
#include<stdlib.h>

int main()
{
    pid_t child;
    child=fork();
    switch(child){
        case -1 :
            perror("fork");
            exit(1);
        case 0 :
            while(1){
                printf("Child Process\n");
                sleep(1);
            }
            break;              
        default :
            sleep(5);
            kill(child,SIGINT);
            printf("The child process has been killed by the parent process\n");
            break;
    }
    return 0;
}

Another signal that cannot be caught is:

Sysfs internally stores the pointer to the . . . . . . . . that implements the directory in the file system.

The major number identifies the . . . . . . . . associated with the device.

In this program the two printed memory locations has the difference of . . . . . . . . bytes.

#include<stdio.h>
#include<stdlib.h>
 
int main()
{
    int *ptr;
    ptr = (int*)malloc(sizeof(int)*2);
    printf("%p\n",ptr);
    printf("%p\n",ptr+1);
    return 0;
}

What is the output of this program?

#include<stdio.h>
#include<sys/time.h>
#include<sys/resource.h>
 
int main()
{
    struct rlimit limit;
    if(getrlimit(RLIMIT_CORE,&limit) != 0)
        perror("getrlimit");
    printf("%lu\n",limit.rlim_max);
    return 0;
}

The process of starting up a computer is known as

Assemble code of the program can be displayed in GDB by the command