made easy test series

Question

Answer 1

Question asked for how many clock pulse y₂= 1

Now BCD up counter is given :

0(Msb) 000 (Lsb) this is given input to decoder = Here y1 is active

0(Msb) 001 (Lsb) this is given input to decoder = Here y3 is active

0(Msb) 010 (Lsb) this is given input to decoder = Here y3 is active

0(Msb) 011 (Lsb) this is given input to decoder = Here y1 is active

0(Msb) 100 (Lsb) this is given input to decoder = Here y0 is active

0(Msb) 101 (Lsb) this is given input to decoder = Here y2 is active

0(Msb) 110 (Lsb) this is given input to decoder = Here y2 is active

0(Msb) 111 (Lsb) this is given input to decoder = Here y0 is active

1(Msb) 000 (Lsb) this is given input to decoder = Here y₀ is active

1(Msb) 001 (Lsb) this is given input to decoder = Here y2 is active

Comments

can you tell me how should i know which one is active...at a time..?