
Linux syscalls
Quiz
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Other
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University
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Practice Problem
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Hard
Amélie Bertin
Used 2+ times
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10 questions
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1.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Qu'est ce qu'un syscall ?
Une fonction qui interrompt le programme pour faire une tâche
Un appel à une fonction de l'OS
Une fonction définit dans le man 3
Une fonction définit dans le man 2
2.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Quel(s) mode(s) pour ouvrir un fichier avec `open` en mode lecture ?
O_RDONLY
O_WRONLY
O_RDWR
O_CREAT
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Comment ouvrir un fichier avec plusieurs flags ?
int fd = open(filename, O_APPEND|O_WRONLY);
int fd = open(filename, O_APPEND + O_WRONLY);
int fd = open(filename, O_APPEND, O_WRONLY);
int fd = open(filename, O_APPEND - O_WRONLY);
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Comment accéder au manuel d'un syscall ?
man <syscall>
man 1 <syscall>
man 2 <syscall>
man 3 <syscall>
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quel syscall pour avoir la taille d'un fichier ?
stat
read
lseek
open
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
int fd = open("file", O_RDONLY);
char chaine[10];
ssize_t c = read(fd, chaine, 5);
avec le contenu de file : "Oui"
Quelle sera la valeur de `c` ?
3
4
5
10
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qu'est ce que retourne `write` en cas d'erreur ?
-1
0
ERROR
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