# Digital Electronics - Shift Registers

Exercise : Shift Registers - General Questions
1.
On the fifth clock pulse, a 4-bit Johnson sequence is Q0 = 0, Q1 = 1, Q2 = 1, and Q3 = 1. On the sixth clock pulse, the sequence is ________.
Q0 = 1, Q1 = 0, Q2 = 0, Q3 = 0
Q0 = 1, Q1 = 1, Q2 = 1, Q3 = 0
Q0 = 0, Q1 = 0, Q2 = 1, Q3 = 1
Q0 = 0, Q1 = 0, Q2 = 0, Q3 = 1
Explanation:
No answer description is available. Let's discuss.

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?
0000
0010
1000
1111
Explanation:
No answer description is available. Let's discuss.

3.
What is a shift register that will accept a parallel input, or a bidirectional serial load and internal shift features, called?
tristate
end around
universal
conversion
Explanation:
No answer description is available. Let's discuss.

4.
On the third clock pulse, a 4-bit Johnson sequence is Q0 = 1, Q1 = 1, Q2 = 1, and Q3 = 0. On the fourth clock pulse, the sequence is ________.
Q0 = 1, Q1 = 1, Q2 = 1, Q3 = 1
Q0 = 1, Q1 = 1, Q2 = 0, Q3 = 0
Q0 = 1, Q1 = 0, Q2 = 0, Q3 = 0
Q0 = 0, Q1 = 0, Q2 = 0, Q3 = 0