Unit-1 MCQ
1)
The universal gate is
(a)
AND gate
(b)
OR gate
(c)
NAND gate
(d)
None of
the above
2)
The inputs of a NAND gate are connected
together. The resulting circuit is
(a)
AND gate
(b)
NOT gate
(c)
OR gate
(d)
None of
the above
3)
Two’s complement of the binary number 0101 is
(a)
1011
(b)
1111
(c)
1101
(d)
None of
the above
4)
In 2’s complement representation the number
11100101 represents the decimal number…
(a)
+37
(b)
-31
(c)
+27
(d)
-27
5)
For the gate in the given figure output will
be---
(a)
0
(b)
1
(c)
A
(d)
A’
6) In
the expression A+BC the total number of min terms will be
(a) 2
(b)
3
(c) 4
(d)
5
7) Decimal
43 in hexadecimal number system and BCD number system is respectively----- and
----
(a) B2 and 01000011
(b)
2B and
01000011
(c) 2B and 00110100
(d)
B2 and 01000100
8) The
circuit of the given figure realizes the function
(a) Y=(A’+B’)C+ (DE)’
(b)
Y=
A’+B’+C’+D’+E’
(c) Y= AB+C+DE
(d)
Y= AB+C(D+E)
9)
Complement of the expression A’B+CD’ is____
(a)
(A’+B)(C’+D)
(b)
(A+B’)(C’+D)
(c)
(A+B’)(C+D’)
(d)
(A’+B)(C+D’)
10)
The canonical SOP for the function Y=A+B is
(a)
AB+A’B
(b)
AB+AB’+A’B
(c)
A+B
(d)
AB+B+A
11)
For the truth table of the given figure Y=
(a)
A+B+C
(b)
A’+BC
(c)
A’
(d)
B’
12)
For the min term designation Y=∑m(1,3,5,7)the complete expression
is
(a) ABC+A’B’C’
(b)A’B’C+AB’C+ABC+A’BC
(c) A’B’C’+A’B’C+A’BC+AB’C
(d) A’B’C’+ABC+A’B’C+AB’C
13)
The hexadecimal number (3E8)16 is
equal to the decimal number
(a) 1000
(b) 982
(c) 768
(d) 323
14)
For the K-Map in the figure the simplified
expression is
(a)
AC+BD’
(b)
AC+BD
(c)
AC’+BD
(d)
BC’D+ACD
15)
1’s complement of 11101101 is
(a)
00010010
(b)
00010011
(c)
00011110
(d)
00001010
16)
All logical operations can be obtained by means
of
(a)
AND and OR gates
(b)
NOT and
OR gates
(c)
NAND and NOR gates
(d)
AND and
NOT gates
17)
Reflected binary code is also known as
(a)
BCD code
(b)
Gray code
(c)
Binary code
(d)
ASCII code
18)
The binary representation of BCD number 0010 1001(decimal
29) is______
(a) 0011101
(b) 0001101
(c) 0101010
(d) 0110101
19)
The basic logic gate whose output is the
complement of the input is
(a)
OR gate
(b)
AND gate
(c)
NOT gate
(d)
EXOR gate
20)
The primary use of Gray code is
(a)
Coded representation of a shaft’s mechanical
position.
(b)
Turning on/off software switches.
(c)
To convert the angular position of a shaft on
rotating machinery into hexadecimal code.
(d)
To represent the correct ASCII code to indicate
the angular position of a shaft on rotating machinery.
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