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This set of Digital Electronics and Logic Design Multiple Choice Questions & Answers (MCQs) focuses on Digital Electronics And Logic Design Set 18

Q1 | The input at the 1, 2, 4, 8 inputs to a 4-line to 16-line decoder with active- low outputs is 1110. As a result, output line 7 is driven LOW.
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Q2 | When decisions demand two possible actions, the IF/THEN/ELSE control structure is used.
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Q3 | TTL stands for transistor-technology-logic.
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Q4 | The 54 prefix on ICs indicates a broader operating temperature range, generally intended for military use.
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Q5 | This is an example of a POS expression:
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Q6 | The abbreviation for an exclusive-OR gate is XOR.
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Q7 | In an even-parity system, the parity bit is adjusted to make an even number of one bits.
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Q8 | In an even-parity system, the following data will produce a parity bit = 1. data = 1010011
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Q9 | The following combination is correct for an ODD parity data transmission system: data = 011011100 and parity = 0
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Q10 | The XOR gate will produce a HIGH output if only one but not both of the inputs is HIGH.
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Q11 | When decisions demand one of many possible actions, the ELSIF control structure is used.
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Q12 | The K-map provides a "graphical" approach to simplifying sum-of- products expressions.
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Q13 | Even parity is the condition of having an even number of 1s in every group of bits.
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Q14 | The look-ahead carry method suffers from propagation delays.
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Q15 | A pull-up resistor is a resistor used to keep a given point in a circuit HIGH when in the active state.
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Q16 | A data selector is also called a demultiplexer.
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Q17 | A digital circuit that converts coded information into a familiar or non- coded form is known as an encoder.
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Q18 | An exclusive-OR gate will invert a signal on one input if the other is always HIGH.
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Q19 | The following combination is correct for an EVEN parity data transmission system: data = 100111100 and parity = 0
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Q20 | The CASE control structure is used when an expression has a list of possible values.
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Q21 | An encoder in which the highest and lowest value input digits are encoded simultaneously is known as a priority encoder.
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Q22 | Three select lines are required to address four data input lines.
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Q23 | Single looping in groups of three is a common K-map simplification technique.
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Q24 | In true sum-of-products expressions, the inversion signs cannot cover more than single variables in a term.
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Q25 | A combinatorial logic circuit has memory characteristics that "remember" the inputs after they have been removed.
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