CS302P Quiz 4

Q1. Reflected Binary Code is also known as _______ code.

1. BCD
2. ASCII
3. Gray Code
4. Excess-3

Correct answer: Gray Code

Q2. To create a Johnson Counter by using D-flip flops, how flip flops should be connected together?

1. Q' output of previous flip flop should be connected to D input of second flip flop
2. Q' output of previous flip flop should be connected to clock input of second flip flop
3. Q output of previous flip flop should be connected to D input of second flip flop
4. Q output of previous flip flop should be connected to clock input of second flip flop

Correct answer: Q output of previous flip flop should be connected to D input of second flip flop

Q3. Total number of inputs in a half adder is __________.

1. 3
2. 2
3. 4
4. 1

Correct answer: 2

Q4. Which of the following gates is used for parity generation for a binary data string?

1. XOR
2. AND
3. NOR
4. OR

Correct answer: XOR

Q5. A decimal counter has ______ states.

1. 2
2. 10
3. 7
4. 9

Correct answer: 10

Q6. In a full adder circuit having inputs A = 1, B =1, Cin = 0, the outputs S and Cout will be _______________.

1. S = 1, Cout = 0
2. S = 1, Cout = 1
3. S = 0, Cout = 1
4. S = 0, Cout = 0

Correct answer: S = 0, Cout = 1

Q7. Following diagram is of ______________ code conversion.

1. ASCII
2. Gray
3. BCD
4. Excess-3

Correct answer: Gray

Q8. When implementing a half adder by using gates, which of the following gates is used to return carry bit as an output?

1. AND
2. XOR
3. NAND
4. OR

Correct answer: AND

Q9. To build a full adder using gates, how many gates are required?

1. 2 AND gates, 3 OR gates, 1 XOR gates
2. 2 AND gates, 2 OR gates, 2 XOR gates
3. 1 AND gate, 2 OR gates, 1 XOR gate
4. 2 AND gates, 2 XOR gates, 1 OR gate

Correct answer: 2 AND gates, 2 XOR gates, 1 OR gate

Q10. Consider the below given EWB circuit, what values will be displayed on 7-segment displays A and B when the circuit simulation is activated in EWB?

1. 3, 3
2. 2, 3
3. 0, 1
4. 1, 3

Correct answer: 3, 3