Digital Electronics-Final

Which are UNIVERSAL GATES?

• AND gate and OR gate

• NAND gate and NOR gate

• XOR gate and XNOR gate

• NOT gate

Which of the following statements is TRUE for an OR Gate:

• A '1' at any of the inputs causes the output to be '1'

• A '1' at any of the inputs causes the output to be '0'

• A '0' at any of the inputs causes the output to be '0'

• A '0' at any of the inputs causes the output to be '1'

Which is the correct order of sequence for representing inputs in K-map

• (00,01,10,11)

• (00,01,11,10)

• (00,10,11,01)

• (00,11,01,10)

For staircase wiring (one lamp controlled by two switches), which logic function can be used to realize the application?

• AND Gate

• OR Gate

• XOR Gate

• NOR Gate

The output of this combinational circuit is:

• A+B+C

• A(B+C)

• B(C+A)

• C(A+B)

In the figure shown, the output ܻ is required to be ܻ Y=AB+ C'D'. The gates G1 and G2 must be, respectively:

• NOR, OR

• NAND, OR

• AND, NAND

• NAND, NOR

The Boolean expression (X+Y) (X+Y')+(XY')'+(X')'simplifies to:

• X

• XY

• X+Y

• Y

The Boolean expression for the truth table shown (D is the output) is :

• B(A+C) (A` +C`)

• B(A+C`)(A`+C)

A subtractor subtracts the subtrahend from the minuend

• True

• False

A priority encoder is a sequential circuit

• True

• False