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WorksheetsDigital Electronics Lab Exam
Total questions: 20
Worksheet time: 14mins
Which of the following is a universal gate?
AND
NAND
OR
NOT
2) A __________ gate gives the output as 1 only if all the inputs signals are 1.
a) AND
b) OR
c) EXOR
d) NOR
3) The boolean expression of an OR gate is _______
a) A.B
b) A’B+AB’
c) A+B
d) A’B’
4) Which of the following gate will give a 0 when both of its inputs are 1?
a) AND
b) OR
c) NAND
d) EXOR
What will the circuit's output be?
1
0
which device has one input and many outputs
flip flop
multiplexer
demultiplexer
counter
3 bits full adder contains ________
3 combinational inputs
4 combinational inputs
6 combinational inputs
8 combinational inputs
The difference between half adder and full adder is __________
Half adder has two inputs while full adder has four inputs
Half adder has two inputs while full adder has three inputs
Half adder has one output while full adder has two outputs
If A, B and C are the inputs of a full adder then the sum is given by __________
A AND B AND C
A XOR B XOR C
None of the above
For subtracting 1 from 0, we use to take a _______ from neighbouring bits.
Carry
Borrow
Input
The inputs of a NAND gate are connected together. The resulting circuit is ………….
Not Gate
Nor Gate
And Gate
Or Gate
A multiplexer is also known as
Coder
parallel adder
Data Selector
NOR gate
A multiplexer is a
1-to-N device
N-to-1 device
1-to-1 device
N-to-N device
Convert the binary number 1101 to gray code.
1001
1111
1011
1100
Convert the Gray code 1010 to binary code.
1111
1100
1101
1001
