Linux
practice.

In linux kernel 2.1, the minor numbers were used to

Sysfs does not contains

Which character to use to escape meaning of special characters in search operations?

nohup is used to

The a.out file is in the

Any file or directory present in the . . . . . . . . directory may not be reserved between the invocation of the program.

Code snippets

str1=”45678\n”
str2=”123\n”
f1 = fopen(file1,RDWR,RWX)
f2 = fopen(file1,RDWR,RWX)
write(f1,str1,len_str1)
write(f2,str2,len_str2)
 
o/p:

The system calls in UNIX is written using which language

? Specifies

Parameters can be passed to a function

The library contains the

In GDB breakpoints can be skipped by the command

What is the meaning of $ sign in awk programming?

What will be printed for the command below?

$ grep –c “^echo” abc

What is the output of the below code?

void sig_handler ( int signum) {
    printf(“Handled the signal\n”);
}
 
int main() {
    int pid;
    signal (SIGKILL, sig_handler);
    pid = fork();
    if (pid==0) {
        kill(getppid(), SIGKILL);
        exit(0);
    } else {
        sleep(20);
    }
    return 0;
}

Which option of the gcc is used to warn is padding is included in structure?

What is the output of this program?

#include<stdio.h>
#include<signal.h>
 
void response (int);
void response (int sig_no)
{
    printf("%s\n",sys_siglist[sig_no]);
}
int main()
{
    pid_t child;
    int status;
    child = fork();        
    switch(child){
        case -1:
            perror("fork");
        case 0:
            break;               
        default :
            signal(SIGCHLD,response);
            wait(&status);
            break;
    }
}

Fork returns . . . . . . . . to parent process on success

cmd 2>&1 > abc will

This program will allocate the memory of . . . . . . . . bytes for pointer "ptr".

#include<stdio.h>
#include<stdlib.h>
 
int main()
{
    int *ptr;
    ptr = (int*)malloc(sizeof(int)*4);
    ptr = realloc(ptr,sizeof(int)*2);
    return 0;
}