ENPC de Constantine 2017/2018
Classe préparatoire / I ere année/ Informatique/ UEM I I
Interrogation : 30 minutes
Exercice 7 : Chagement de base
I . Convertir les nombres suivants en base 2, 8, l6 :
a) 25
b) 38
2. F aite I'addition en binaire des deux nombres suivants :
a) lll00etll0ll
3. Combien d'entiers positifs on peut coder sur :
a) 4 bits
b) 8 bits
c) 32 bits
d) 64 bits
Exercice 2 : Algère de Boole
Sois la fonction suivante :
F(A,B,C)- A.B+ A.C.E
o Écrire la table de vérité (détaillée) de cette fonction.
o Modéliser cette fonction sous forme de logigramme en utilisant les portes logiques vues en
cours.
a Écrire la forme canonique somme de la fonction en utilisant la table de vérité.
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