Answer b =1
2 The parameter through which 16 distinct values can be represented is known as
________
a) Bit
b) Byte
c) Word
d) Nibble
3. If the decimal number is a fraction then its binary equivalent is obtained by ________ the
number continuously by 2.
a) Dividing
b) Multiplying
c) Adding
d) Subtracting
Answer: b
Explanation: On multiplying the decimal number continuously by 2, the binary
equivalent is obtained by the collection of the integer part. However, if it’s an integer,
then it’s binary equivalent is determined by dividing the number by 2 and collecting
the remainders.
4. The representation of octal number (532.2)8 in decimal is ________
a) (346.25)10
b) (532.864) 10
c) (340.67) 10
d) (531.668) 10
Answer: a
Explanation: Octal to Decimal conversion is obtained by multiplying 8 to the power of
base index along with the value at that index position.
(532.2)8 = 5 * 82 + 3 * 81 + 2 * 80 + 2 * 8-1 = (346.25)10
5. An important drawback of binary system is ________
a) It requires very large string of 1’s and 0’s to represent a decimal number
b) It requires sparingly small string of 1’s and 0’s to represent a decimal number
c) It requires large string of 1’s and small string of 0’s to represent a decimal number
d) It requires small string of 1’s and large string of 0’s to represent a decimal number
Answer: a
Explanation: The most vital drawback of binary system is that it requires very large
string of 1’s and 0’s to represent a decimal number. Hence, Hexadecimal systems are
used by processors for calculation purposes as it compresses the long binary
strings into small parts.
6. The largest two digit hexadecimal number is ________
a) (FE)16
b) (FD)16
c) (FF)16
d) (EF)16
7. Representation of hexadecimal number (6FB)16 in decimal:
a) 6 * 162 + 13 * 161 + 14 * 160
b) 6 * 162 + 12 * 161 + 13 * 160
c) 6 * 162 + 15 * 161 + 11 * 160
d) 6 * 162 + 14 * 161 + 15 * 160
8. The quantity of word is ________
a) 16 bits
b) 32 bits
c) 4 bits
d) 8 bits
9. The binary equivalent of the octal number (364)8 is ______
a) (011110100)2
b) (011111100)2
c) (011110101)2
d) (011110110)2
Ans a
10 The binary number 10101 is equivalent to decimal number …………..
1. 19
2. 12
3. 27
4. 21
Ans 21
The universal gate is ………………
11.
1. NAND gate
2. OR gate
3. AND gate
4. None of the above
12 The inputs of a NAND gate are connected together. The resulting circuit
is ………….
1. OR gate
2. AND gate
3. NOT gate
4. None of the above
13. The NAND gate is AND gate followed by …………………
1. NOT gate
2. OR gate
3. AND gate
4. None of the above
14 The only function of NOT gate is to ……………..
1. Stop signal
2. Invert input signal
3. Act as a universal gate
4. None of the above
15 In Boolean algebra, the bar sign (-) indicates ………………..
1. OR operation
2. AND operation
3. NOT operation
4. None of the above
16
2’s complement of binary number 0101 is ………..
1. 1011
2. 1111
3. 1101
4. 1110
17 Decimal number 9 is equal to binary number ……………
1. 1110
2. 1010
3. 1001
4. 1000
18 For the gate in the given figure the output will be ………..
1. 0
2. 1
3. A
4. Ā
19. The number of digits in octal system is ………
1. 8
2. 7
3. 9
4. 10
20.Decimal 43 in hexadecimal and BCD number system is respectively…….
and ……..
1. B2 and 01000011
2. 2B and 01000011
3. 2B and 00110100
4. B2 and 01000100
Answer : 2
Explanation:
21 The circuit of the given figure realizes the function …………
Answer
22 7BF16 = __________ 2
1. 0111 1011 1110
2. 0111 1011 1111
3. 0111 1011 0111
4. 0111 1011 0011
Answer : 2
Explanation:
7BF16 = 7 x 162 + 11 x 161 + 15 x 160 = 1983 in decimal = 0111 1011 1111 in
binary.
23 The hexadecimal number (3E8)16 is equal to decimal number ………
1. 1000
2. 982
3. 768
4. 323
Answer : 1
Explanation: 3 x 162 + 14 x 161 + 8 = 1000
24. 1’s complement of 11000110 is ……………….
1. 00111001
2. 10000001
3. 00011010
4. 00000000
25. convert the (13)10 decimal no. into gray code.
1. 1010
2.1011
3.1011
4.1000
Answer 2
26.BCD Stands for________
1.binary code decibel
2. binary coded decimal
3.binary code decimal
4. binary coded decibel
27. what do you mean by alphanumeric codes_______
1. representation of alphabets only.
2. representation of alphabets and Numbers.
3. representation of number only.
4.All of above.
28. ASCII Stands for ________.
1.American standard code for Information exchange.
2. American standard code for Information interchange.
3. American standard coded in Information interchange.
4. none of above.
29.If Inputs A=1,B =0 the output of NOR gate is_____.
1.0
2.1
30. What is Boolean Expression of NAND gate is______.
1.AB’+A’B
2.A’B’+A’B+AB’
3.AB+A’B+A’B’
4.(A+B)’
Answer 4
