Combinational Circuits 2

The Boolean expression shown is for

• AND gate

• OR gate

• NAND gate

• NOR gate

In Boolean algebra, the bar sign ( ) indicates

• Not operation

• And operation

• OR operation

• None of the above

The numbers of nand gates contained in 7400 IC are

• 2

• 4

• 6

• 8

the numbers of data entries are necessaries for three input circuit is

• 2

• 4

• 8

• 16

which of the symbols shown represent XOR gate

• a

• b

• c

• d

The Boolean expression of the logic circuit shown is D=

• 'B +(A . C)

• A .( B + 'C)

• 'A +( B . C)

• 'A +( B . 'C)

The logic circuit in fig is equivalent to

• AND

• OR

• NAND

• NOR

* The logic circuit in fig is equivalent to …………. gate

• AND

• OR

• NAND

• NOR

The Boolean expression related to the truth table shown is

• Y=A

• Y=B

• Y=A.B

• Y=A+B

The motor in a washing machine should not operate until the water level is high enough and a signal sent from the control program. The logic gate that should be

used for this case is

• AND

• OR

• NOT

• NAND