' : Ecole Nationale Polytechnique Malek Bennabi Constantine (ENPC)
- -
Classe préparatoir e I 1 er e année/ Informatique/ UEM I II 2020 -2021
Examen Informatique I (lh 30)
Exercice 1: (4points)
l. Déterminer la base B tel que :
a) 55trol : 671æ4
b) 2\ro1: 16 rs)
2. Déterminer le nombre X tel que :
L/
l0ll0
(X)z
I 0 1r I l lcàz
NB : Il faut impérativement indiquer la méthode utilisee ainsi que les résultats.
Exercice2: (6points)
Considérer la table de Karnaugh suivante :
A.B
-
00 0t ll l0
à\
0 1 I I I
I I 1
l. Générer la fonction (Somme de produit) qui a permet d'aboutir à cette table.
2. Simplifier algébriquement la fonction génerée.
L
, .'
.a
'
3. Déduire la fonction F à partir du logigramme suivant :
4. Optimiser (simplifier) Ie schéma logique de la fonction.F.
r\
Exercice3: (6points)
Ecrire une fonction qui permet de retourner le nombre d'occurrence du caractère "n" dans la
phrase : < Bonjour, je m'appelle Ammar Noureddine. >
On suppose que la phrase est dans une matrice Mat:
Mat
B o n i o u
r i e m
a p p e I I
e A m m a r
N o u r e d
d I n e 1
Exercice4:(4points)
Ecrire un algorithme qui permet de calculer et d'afficher le nombre d'occurrence du caractère "n"
et "m" dans la Matrice Mat.
Bonne chance.
2
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