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WorksheetsCombinational Circuits
Total questions: 15
Worksheet time: 11mins
3 bits full adder contains
3 combinational inputs
4 combinational inputs
6 combinational inputs
8 combinational inputs
In a multiplexer, the selection of a particular input line is controlled by ___________
Data controller
Selected lines
Logic gates
Both data controller and selected lines
If the number of n selected input lines is equal to 2^m then it requires _____ select lines.
2
m
n
2n
In the given 4-to-1 multiplexer, if c1 = 0 and c0 = 1 then the output M is ___________
X0
X1
X2
X3
X=AB’+A’B
X=(AB)’+AB
X=(AB)’+A’B’
X=A’B’+AB
Comparator
Multiplexer
Inverter
Demultiplexer
In 1-to-4 multiplexer, if C1 = 1 & C2 = 1, then the output will be ___________
Y0
Y1
Y2
Y3
Most demultiplexers facilitate which type of conversion?
Decimal-to-hexadecimal
Single input, multiple outputs
AC to DC
Odd parity to even parity
If A and B are the inputs of a half adder, the sum is given by __________
A AND B
A OR B
A XOR B
A EX-NOR B
If A and B are the inputs of a half adder, the carry is given by __________
A AND B
A OR B
A XOR B
A EX-NOR B
If A, B and C are the inputs of a full adder then the sum is given by __________
A AND B AND C
A OR B AND C
A XOR B XOR C
A OR B OR C
For subtracting 1 from 0, we use to take a _______ from neighbouring bits.
Carry
Borrow
Input
Output
The full subtractor can be implemented using ___________
Two XOR and an OR gates
Two half subtractors and an OR gate
Two multiplexers and an AND gate
Two comparators and an AND gate
The output of a full subtractor is same as ____________
Half adder
Full adder
Half subtractor
Decoder
How many outputs are required for the implementation of a subtractor?
1
2
3
4
