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WorksheetsDigital Electronics Quiz -U1-U2
Total questions: 15
Worksheet time: 29mins
Name
Class
Date
1.
In the 2’s complement form, the binary number 10010011 is equal to the decimal number
a)
-19
b)
109
c)
91
d)
-109
2.
The decimal number -34 is expressed in the 2’s complement form as
a)
1011110
b)
10100010
c)
11011110
d)
1011101
3.
The binary number 11011101 is equal to the decimal number
a)
121
b)
221
c)
441
d)
256
4.
The sum of 1111 + 1111 in binary equals
a)
10000
b)
2222
c)
11110
d)
11111
5.
In a 4-variable Karnaugh map, a 2-variable product term is produced by
a)
a 2-cell group of 1s
b)
an 8-cell group of 1s
c)
a 4-cell group of 1s
d)
a 4-cell group of 0s
6.
The number of boolean functions that can be generated by 3 variables is equal to
a)
16
b)
256
c)
4
d)
8
7.
If (1235)x = (3033)y , where x and y indicate the bases of corresponding numbers, then
a)
X=7 and y=5
b)
X=8 and y=6
c)
X=6 and y=4
d)
X=9 and y=7
8.
The range of signed decimal number that can be represented by 12-bit BCD
a)
0 to 999
b)
0 to 555
c)
-550 to 449
d)
-500 to 499
9.
Consider the Boolean function
F(A,b,c,d) = ∑ (0,2,3,4,5,7,8,9,10,13,14,15) . How many essential prime implicants are there.
a)
6
b)
5
c)
10
d)
4
10.
a)
b)
c)
d)
11.
The range of signed decimal numbers that can be represented by 6 bits 1's complement number is
a)
-31 to 31
b)
-63 to 63
c)
-64 to 63
d)
-32 to 31
12.
a)
b)
c)
d)
13.
a)
5
b)
4
c)
2
d)
3
14.
a)
b)
c)
d)
15.
a)
0
b)
1
c)
x
d)
x
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