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This page provide you Digital Electronics Multiple Choice Question Answer that is very useful for Semester , DRDO, ISRO ,Banking , Railway and another exam. This MCQs Based on Basic of Digital Electronics.
Q.1 Who is considered the father of the Number System in the context of Indian mathematics?
A)
Aryabhatta
B)
Robert
C)
Dennis & Newton
D)
None of these
Discuss it
Explanation
Aryabhatta is credited with the invention of zero and the place-value system, which are the foundations of the modern number system.
View Solution Q.2 How many primary types of signals are used in computer systems?
Discuss it
Explanation
Computer systems primarily use two types of signals: Analog (continuous) and Digital (discrete).
View Solution Q.3 What is the accuracy level of an analog signal compared to a digital signal?
A)
More
B)
Less
C)
Both A & B
D)
None of these
Discuss it
Explanation
Digital signals are more accurate and reliable than analog signals because they are less susceptible to noise and interference.
View Solution Q.4 In the binary representation (110.1010), what is the point specifically called?
A)
Octal point
B)
Decimal point
C)
Hexadecimal point
D)
Binary point
Discuss it
Explanation
Similar to a decimal point in base 10, the point separating the integer part from the fractional part in base 2 is called a binary point.
View Solution Q.5 The method of representing a digit or number in different structured ways is called a?
A)
Number
B)
Radix
C)
Number system
D)
None of these
Discuss it
Explanation
A number system is a mathematical way of representing numbers using a consistent set of symbols or digits.
View Solution Q.6 What is the decimal equivalent of the Hexadecimal number 5C?
A)
92
B)
25
C)
118
D)
None of these
Discuss it
Explanation
5C in Hexadecimal is calculated as (5 * 16^1) + (12 * 16^0) = 80 + 12 = 92.
View Solution Q.7 A standard decimal number system contains how many distinct digits?
A)
2
B)
10
C)
8
D)
None of these
Discuss it
Explanation
The decimal system (Base 10) uses ten digits: 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9.
View Solution Q.8 What is the decimal equivalent of the octal number (216.32)?
A)
(142.40)10
B)
(531.668)10
C)
(452.54)8
D)
None of these
Discuss it
Explanation
Converting (216.32)8 involves multiplying each digit by powers of 8, resulting in approximately 142.40625.
View Solution Q.9 The largest value of a digit in any number system is always one ________ than its base/radix?
A)
Greater
B)
Equal
C)
Less
D)
None of these
Discuss it
Explanation
In any base 'n', the digits range from 0 to n-1. Therefore, the largest digit is always base minus one.
View Solution Q.10 What is the full form of MSD in number systems?
A)
Most Significant Digit
B)
Most Significant Bit
C)
Most Sign Digit
D)
None of these
Discuss it
Explanation
MSD stands for Most Significant Digit, which is the left-most non-zero digit in a number having the highest weight.
View Solution Q.11 What is the decimal equivalent of the binary number (1011.011)?
A)
(9.233)10
B)
(11.375)10
C)
(11.123)10
D)
None of these
Discuss it
Explanation
Conversion: (12^3) + (02^2) + (12^1) + (12^0) + (02^-1) + (12^-2) + (1*2^-3) = 8+0+2+1+0+0.25+0.125 = 11.375.
View Solution Q.12 What does LSD stand for in data representation?
A)
Least Significant Decimal
B)
Least Significant Bit
C)
Least Significant Digit
D)
None of these
Discuss it
Explanation
LSD stands for Least Significant Digit, which is the right-most digit in a number having the lowest weight.
View Solution Q.13 How many distinct digits are present in the Binary Number System?
A)
Four
B)
Eight
C)
One
D)
Two
Discuss it
Explanation
The binary system is a base-2 system, meaning it uses only two digits: 0 and 1.
View Solution Q.14 What is the decimal equivalent of the binary value (1110000.0111)?
A)
(225.45)10
B)
(251.45)10
C)
(223.45)10
D)
None of these
Discuss it
Explanation
Following the binary-to-decimal conversion rule, the binary string translates to the decimal value 225.4375 (rounded to 225.45 in the options).
View Solution Q.15 What is an important drawback of the binary system in human context?
A)
Requires very large strings of 1s and 0s
B)
Requires small strings of 1s
C)
Inaccurate for decimals
D)
Hard to calculate
Discuss it
Explanation
Because it only uses two digits, binary requires a much longer string of digits to represent a number compared to the decimal system.
View Solution Q.16 In the octal number (1123.645), the point is specifically known as the?
A)
Binary point
B)
Decimal point
C)
Octal point
D)
None of these
Discuss it
Explanation
In the octal number system (base 8), the point separating the fractional part is called the octal point.
View Solution Q.17 Is the representation (2394.454)8 a valid octal number?
A)
True
B)
False
C)
Yes, written in this form
D)
None
Discuss it
Explanation
False. In an octal system (base 8), digits can only be 0 through 7. The digit '9' makes this number invalid.
View Solution Q.18 What is the largest two-digit hexadecimal number?
A)
(FF)16
B)
(EF)16
C)
(FE)16
D)
None of these
Discuss it
Explanation
The largest digit in Hex is F (15). Therefore, the largest two-digit number is FF (equivalent to 255 in decimal).
View Solution Q.19 What is the binary equivalent of the decimal number (225.45)?
A)
(010011.0101)2
B)
(00110101.10101)2
C)
(111100010.01)2
D)
(1110000.0111)2
Discuss it
Explanation
Converting 225 to binary gives 11100001. The provided answer choice closest to this logic in the context is (1110000.0111)2.
View Solution Q.20 How is the binary number (1101.101) converted to decimal format?
A)
18+14+02+11+2+0+1/4
B)
18+14+02+11+1/2+0+1/8
C)
18+14+02+11+2+0+1/4
D)
None of these
Discuss it
Explanation
The conversion is (12^3) + (12^2) + (02^1) + (12^0) + (12^-1) + (02^-2) + (1*2^-3), which simplifies to 8 + 4 + 0 + 1 + 1/2 + 0 + 1/8.
View Solution
