Number Systems and Codes Questions and Answers
Number Systems and Codes Questions with Answers form the foundation of digital electronics reasoning and aptitude exams. This topic includes binary, octal, decimal, and hexadecimal number conversions, along with coding systems like Gray, ASCII, and BCD. Competitive exams such as GATE, DRDO, and ISRO often test candidates’ logical understanding of number representation and digital computation. Practicing reasoning questions and answers with step-by-step solutions builds numerical reasoning and circuit analysis confidence. Each question is structured to test clarity on base conversions, weighted codes, and arithmetic operations. With these aptitude-based questions, you can easily master the numerical logic behind digital systems. Download the PDF and start your reasoning test practice online today.
Number Systems and Codes
101. A decimal fraction can be converted to binary by using the repeated division-by-2 method.
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103. The binary number system is fundamental to all digital computers.
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104. Repeated division-by-10 is used to convert decimal numbers to binary numbers.
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107. A binary number can be converted to a decimal number by summing the decimal values of the weights of all the 1s in the binary number.
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108. Binary-coded-decimal numbers use only binary numbers between 0000 and 1001.
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109. A good example of the use of a digital representation of an analog quantity is the audio recording of music.
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110. Each position in a decimal multidigit number will have a weighting factor based on a power of only 10.
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