Combinational Circuits

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