|
1
|
An equivalent representation for
the Boolean expression A + A' is
|
|||
|
|
(a) 1
|
(b)
0
|
||
|
|
(c)
A
|
(d)
A’
|
||
|
2
|
A
NOT gate has...
|
|||
|
|
(a)
Two inputs and one output
|
(b) One input and one output
|
||
|
|
(c)
One input and two outputs
|
(d)
None of above
|
||
|
3
|
A XNOR gate has inputs A and B
and output Y.Then the output equation is:
|
|||
|
|
(a)
Y=A+B
|
(b)
Y=AB+A’B
|
||
|
|
(c) Y=A’B’+AB
|
(d)
Y=A’B+ AB’
|
||
|
4
|
Which
is correct?
|
|||
|
|
(a) A.1=A
|
(b)
A.A=0
|
||
|
|
(c)
A+A=A’
|
(d)
A’.A’=0
|
||
|
5
|
Demorgan’s theorem is
|
|||
|
|
(a)
A.A’=0
|
(b)
A’’=A
|
||
|
|
(c) (A+B)’=A’B’
|
(d)
(AB)’=A’B’
|
||
|
6
|
An equivalent representation for
the Boolean expression A' + 1 is:
|
|||
|
|
(a) A
|
(b)
A’
|
||
|
|
(c)
0
|
(d)
1
|
||
|
7
|
On a Karnaugh map, grouping the 0s produces:
|
|||
|
|
(a) A
“Don’t Care” condition
|
(b) A
SOP Expression
|
||
|
|
(c) A POS Expression
|
(d) None
of the above
|
||
|
8
|
Which of the following gates
generates the truth table shown?
x y | F
-----------
0 0 | 1
0 1 | 0
1 0 | 0
1 1 | 1
|
|||
|
|
(a)
OR gate
|
(b ) NAND gate
|
||
|
|
|
(c)
XOR gate
|
||
|
9
|
A two-input NAND gate will produce a logic 0 output when:
|
|||
|
|
a)
Both of the inputs are at
logic 0
|
b)
Either one of the inputs is
at logic 0
|
||
|
|
c)
Both
of the inputs are at logic 1.
|
d)
None of the above
|
||
|
10
|
A.(B + C) = A.B + A.C is the
expression of _________________
|
|||
|
|
a)
Demorgan's Law
|
b)
Commutative Law
|
||
|
|
c)
Distributive Law
|
d)
Associative Law
|
||
|
11
|
What
is the output state of an OR gate if the inputs are 0 and 1?
|
|||
|
|
a)
0
|
b)
1
|
||
|
|
c)
2
|
d)
3
|
||
|
12
|
A
NOT gate has...
|
|||
|
|
a) Two
inputs and one output
|
b)
One input
and one output
|
||
|
|
c)
One input and two outputs
|
d)
none of above
|
||
|
13
|
Logic
states can only be ___ or 0.
|
|||
|
|
a)
0
|
b)
1
|
||
|
|
c)
2
|
d)
3
|
||
|
14
|
A
NAND gate is equivalent to an AND gate plus a .... gate put together
|
|||
|
|
a)
NOT
|
b)
NOR
|
||
|
|
c)
XNOR
|
d)
NAND
|
||
|
15
|
Which of these are universal
gates
|
|||
|
|
a)
NOR
|
b)
NAND
|
||
|
|
c)
NOR and NAND Both
|
d)
None
|
||
|
16
|
A XOR gate has inputs A and B and output Y.Then the output equation is:
|
|||
|
|
a) Y=A+B
|
b) Y=AB+A’B
|
||
|
|
c) Y=A’B+
AB’
|
d) Y=AB’+A’B’
|
||
|
17
|
Which
is correct?
|
|||
|
|
a)
A.A=0
|
b)
A+1=A
|
||
|
|
c)
A+A=A'
|
d)
A'.A'=0
|
||
|
|
|
|
||
Computer Organization and Architecture MCQ -1
