CS302P Quiz 4 Set 2

Q1. In 8x1 multiplexer, which one of the following lines must always be connected to ground in order to activate the mutiplexer?

1. Y
2. W
3. G'
4. Vcc

Correct answer: G'

Q2. Which of the following gates is used for parity generation for a binary data string?

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

Correct answer: XOR

Q3. 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. 0, 1
2. 1, 3
3. 2, 3
4. 3, 3

Correct answer: 1, 3

Q4. A full adder circuit takes ______________ bit(s) as input and returns ____________ bit(s) as output.

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

Correct answer: 3, 2

Q5. Which of the following symbols is used to represent XOR operation?

1. ⊕
2. +
3. x
4. ^

Correct answer: ⊕

Q6. How many select lines would be required for an 8x1 multiplexer?

1. 1
2. 8
3. 3
4. 2

Correct answer: 3

Q7. 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 D input of second flip flop
3. Q output of previous flip flop should be connected to clock 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

Q8. Reflected Binary Code is also known as _______ code.

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

Correct answer: Gray Code

Q9. Which of the following is an invalid BCD code?

1. 0101
2. 1001
3. 0011
4. 1101

Correct answer: 1101

Q10. Convert the Gray code 1011 to binary.

1. 1011
2. 0111
3. 1010
4. 1101

Correct answer: 1101