Logic Gates in Digital Electronics

Digital Signals have how many defined levels?
a.  0
b.  1
c.  2
d.  infinite

• A.
• B.
• C.
• D.

Which of the following gate types below is NOT considered a universal gate?

a. XOR

b. NAND

c. NOR

d. None of the above

• A.

• B.

• C.

• D.

Which Logic Gate is represented by the expression to the right?
a.  NAND
b.  NOR
c.  AND
d.  OR

• A.
• B.
• C.
• D.

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

Which Logic Gate is represented by the symbol given in the image?

a. OR

b. XNOR

c. NOR

d. XOR

• A.

• B.

• C.

• D.

2) A __________ gate gives the output as 1 only if all the inputs signals are 1.

• a) AND

• b) OR

• c) EXOR

• d) NOR

What kind of gate does this Truth Table represent?

• XOR
• OR
• NOT
• AND

The Boolean expression Y = (AB)’ is logically equivalent to what single gate?

• NAND

• NOR

• AND

• OR

5) The Boolean expression for a 3-input AND gate is ________.

• A )X = AB

• B) X = ABC

• C) X = A + B + C

• D) X = AB + C