
Info2 / prog C
Authored by Yann Leboulanger
Computers
University
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5 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Quel nom de variable est le mieux choisi :
int var1
int COMPTEUR
int entree
int sortir_pour_le_portA_du_microcontroleur
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quelle instruction permet de forcer le bit 2 de x à 1 :
x = x | 2
x = x | (1 << 2)
x = x & (1 << 2)
x = x & 2
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quelle est la meilleur écriture pour forcer le bit TXEN de UCSRB à 1 :
UCSRB = UCSRB | 0x08
UCSRB = UCSRB | (1 << 3)
UCSRB = UCSRB | 1 << TXEN
UCSRB = UCSRB | (1 << TXEN)
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quelle instruction permet de fixer le bit 2 de x à 0
x = x & ~(1<< 2)
x = x & (1<< 2)
x = x | (0<< 2)
x = x | ~(1<< 2)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quelle instruction permet de tester si le bit 2 de x est à 0
if (x == 0)
if ((x | (1 << 2)) == 0)
if ((x & (1 << 2)) != 0)
if ((x & (1 << 2)) == 0)
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