What is the difference between a shift-right register and a shift-left register?

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Question
What is the difference between a shift-right register and a shift-left register?
Options
A. There is no difference.
B. the direction of the shift

Correct Answer

the direction of the shift

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2. 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

3. 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

5. 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

6. How would a latch circuit be used in a microprocessor system?
Options
A. as transportation for Intel employees
B. for a group of data that is the same
C. as a set of common connections for transfer of data

8. When is it important to use a three-state buffer?
Options
A. when two or more outputs are connected to the same input
B. when all outputs are normally HIGH
C. when all outputs are normally LOW
D. when two or more outputs are connected to two or more inputs

9. When the output of a tristate shift register is disabled, the output level is placed in a:
Options
A. float state
B. LOW state
C. high-impedance state
D. float or high-impedance state

10. To operate correctly, starting a ring shift counter requires:
Options
A. clearing all the flip-flops
B. presetting one flip-flop and clearing all others
C. clearing one flip-flop and presetting all others
D. presetting all the flip-flops

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