What is a recirculating register? serial out connected to serial in all Q output

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Question
What is a recirculating register?
Options
A. serial out connected to serial in
B. all Q outputs connected together
C. a register that can be used over again

Correct Answer

serial out connected to serial in

Shift Registers problems

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4. A serial in/parallel out, 4-bit shift register initially contains all 1s. The data nibble 0111 is waiting to enter. After four clock pulses, the register contains ________.
Options
A. 0000
B. 1111
C. 0111
D. 1000

5. What type of register would have a complete binary number shifted in one bit at a time and have all the stored bits shifted out one at a time?
Options
A. parallel-in, parallel-out
B. parallel-in, serial-out
C. serial-in, parallel-out
D. serial-in, serial-out

7. 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 ________.
Options
A. 1101
B. 0111
C. 0001
D. 1110

9. A bidirectional 4-bit shift register is storing the nibble 1110. Its input is LOW. The nibble 0111 is waiting to be entered on the serial data-input line. After two clock pulses, the shift register is storing ________.
Options
A. 1110
B. 0111
C. 1000
D. 1001

10. The bit sequence 0010 is serially entered (right-most bit first) into a 4-bit parallel out shift register that is initially clear. What are the Q outputs after two clock pulses?
Options
A. 0000
B. 0010
C. 1000
D. 1111

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