Shift Registers

Q1: Assume that a 4-bit serial in/serial out shift register is initially clear. We wish to store the nibble 1100. What will be the 4-bit pattern after the second clock pulse? (Right-most bit first.)

A 1100

B 1111

C 0011

D 0000

ANS:C - 0000

Initially, value is 0000.
Shifting value is 1100.
1st clock pulse =0000.
Shifting value is 110.
2nd clock pulse=0000.
Shifting value is 11.
Answer 2nd pulse =0000.
3rd clock pulse=1000.
4th clock pulse=1100.

So, the question asking in 2nd clock pulse answer is 0000.



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