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
131. A parity bit is used to detect an error in data transmission caused by noise.
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132. Most computers store binary data in groups of 32 bits called Dwords.
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- FALSE
133. The word size is defined as the number of bits in the binary word that a digital system operates on.
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135. The 1's complement of a binary number is derived by changing 0s to 1s and 1s to 0s.
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137. The 2's complement of a binary number is derived by adding 1 to the 1's complement.
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- FALSE
139. The ASCII code is a special code that represents all alphanumeric data.
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- FALSE
140. Many digital electronic systems work in hexadecimal instead of binary.
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- FALSE