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In a parallel in/parallel out shift register, D0 = 1, D1 = 1, D2 = 1, and D3 = 0. After three clock pulses, the data outputs are ________

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In a parallel in/parallel out shift register, D0 = 1, D1 = 1, D2 = 1, and D3 = 0. After three clock pulses, the data outputs are ________

(a) 1110

(b) 0001

(c) 1100

(d) 1000

This question was addressed to me by my school principal while I was bunking the class.

Query is from Shift Register Counters topic in portion Registers of Digital Circuits

1 Answer

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Right option is (b) 0001

Easy explanation: Parallel in parallel out gives the same output as input. Thus, after three clock pulses, the data outputs are 0001.

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