# Shift Registers – 11

11. A bidirectional 4-bit shift register is storing the nibble 1101. Its input is HIGH. The nibble 1011 is waiting to be entered on the serial data-input line. After three clock pulses, the shift register is storing ________.

(a) 1101
(b) 0111
(c) 0001
(d) 1110

Explanation
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