WorksheetsDigital Electronics Quiz
Total questions: 51
Worksheet time: 26mins
What is the value of K in the given number system expression? (347)16 =(3515)x
6
7
5
4
Which of the following codes is also known as unit distance code?
Gray code
One bit change code
Reflected binary code
Binary code
The 2's complement of the number 1101101 is:
11010
1101110
1111 1000
0110010
Which of the following binary numbers could be referred to as a nibble?
1001
10
1111
1100
Convert the hexadecimal number (A72E.BF85)16 into the octal number system.
(123456.577024)%
(234156.577024)%
(123456.577024)%
(112346.572024)%
The octal equivalent of (245)o is:
(360)
(365)
(563)
(245)
Convert 128 decimal number to binary.
100000
10000000
10010100
1000001
Find the excess -3 code for decimal 12:
01010100
0010010
0001 1010
01000101
Two's complement of a certain binary number 11100101.
0001 1011
Indeterminate from given data
1
8
What is the radix of binary number?
5
4
4
What is the value of k in the given number (235)16=(4230)k?
0
2
0
What is the equivalent hexadecimal number of an octal number 07?
15
08
If (84), (in base-X number system) is equal to (64), (in base-y number system), then possible values of x and y are?
12,9
9, 12
The binary number 10101 is equivalent to decimal number?
21
8,6
State the octal equivalent of hexadecimal number (B35)16?
(6454)%
(4564)%
What is the number of bits in a byte?
4
8
What is the largest positive value that can be represented by an 8 bit 2's complement number?
127
128
What is the hamming distance between the codes 11001011 and 10000111?
2
3
4
5
What is the resultant of 11100111-00010011?
00000101
11010100
Identify the number system for the following sequence 0, 1, 23, 10, 11, 12, 13, 20, ......
Decimal
Quaternary
Parity Bits are used?
For Data Encryption
To detect errors
Parity bits are used for the purpose of error detection.
Power monitoring
Error detection
Symmetry Generation
Time Stamping data
What would be the equivalent binary expression for 456?
111001000
456
553
None of these
The decimal equivalent of the hexadecimal number E5 is
279
229
427
None of these
ASCII is a standard data-encoding format for electronic communication between computers.
a four bit VP, O/P code
a 2-bit VIP, O/P code
a 7-bit /P, OP code
a 8-bit /P, O/P code
If (211) = (152), then value of base x is
6
5
8
9
The gray code of digit '7' is
0100
0111
Which of the following is not a valid BCD?
0110
11100100
1000
11100010
A four bit number is given as 1001. Its 2's complement is
1001
0110
1110
0111
A code in which each decimal digit is represented by a group of 4 binary bits is
BCD (Binary Coded Decimal)
Excess 3 code
ASCII code
Gray code
The maximum number of binary bits required to represent a digit of octal number is
3
2
4
5
The decimal equivalent of the hexadecimal number (111)6 is
272
256
274
254
Which of the following is not a binary code?
Morse
Baudot
CCITT-2
ARQG
The binary equivalent of BCD 000100100110 is
1111110
1011110
1101110
1111111
The number 149 in octal code is
154
178
225
149
The 2's complement of 11011111 is
00100000
00100001
11011111
11111111
The binary description of 129.25 is
(10000001.01)2
(11000001.01)2
(10000011.10)2
(10000001.11)2
2's complement of Binary number 01110100 +1
1101
1110
47
21
Decimal 14 is equal to Binary number -2 14
5
7
14
8
To convert binary of decimal number 14
(303.20)
(313.120)%
(01110100)2
(11110111)
Number of bits needed to code 256 operations is:
4
6
8
16
The binary representation of the decimal number 45.25 is
(101101.01)
(101010.01)2
(303.20)
(45)10= (101101)
The 2's complement of the binary number (11001100) is
(00110100)
(00110000)2
(1010101.10)2
(11110100)2
In Binary Coded Decimal (BCD) systems, the decimal number 81 is represented as
10000001
01010001
9
11
Decimal Number is equal to Octal Number of 12 -
(12)8 = 1 × 8'+2 x 8°
(10)10
(12)8 = 10
(12)8 = 8+2= 10
The 2's complement of binary number (00001111) is
(00001111)
(11110000)2
(10101010)2
(11110001)2
The value of the binary 11111 is:
2-1
10
64
12
The binary number 010010 is equivalent to octal number:
62
22
12
10
The 2's complement of the binary number (11011100) is
(11000100)
(00110000)
(10101010)
(11110000)
The octal equivalent of decimal number 66 is
102
104
82
110
The decimal representation of the binary number (101010.011) is
24.25
42.375
42
10
