Full Subtractor Question & AnswersNovember 22, 2021 By WatElectronics This article lists 100 Full Subtractor MCQs for engineering students. All the Full Subtractor Questions & Answers given below include a hint and a link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up their fundamentals on Full Subtractor.A full subtractor is a combinational logic circuit. The main function of a full subtractor is to perform logical or Boolean subtraction operations using 2 half subtractors. It consists of 3 inputs A, B, Bin where Bin is Borrow in and 2 outputs D-difference and Bout – Borrow output. It is also available in form of IC technology such as 74LS283N Full subtractor IC with 16 pins.A full subtractor requires 7 logic gates to be implemented namely 2XOR, 2AND, 2NOT, and one OR gate. The Boolean equation obtained from the full subtractor is represented using K-map. The advantages of a full subtractor include cascades multiple half subtractors, uses a full adder & 2’s complement. But they limit in terms of absence of borrow bit, delay, and complex design. A full adder is employed in computers, microcontrollers, and processors.1). A full subtractor is a _____ type of electronic circuit? Combinational Logical Sequential All the above HintOne of the classification of electronic circuits Read more about the electronic circuits.2). A full subtractor performs subtraction minimum of ___ number of inputs? 2 3 4 1 HintMinimum number3). A full subtractor is a combination of ____ component? Half adders Half subtractors Full adders Half multiplexers Hintcombination of 2 subtractor.4). How many inputs do a full subtractors have? 2 3 4 5 Hintabove minimum number 5). How many outputs do a full subtractors have? 2 3 4 5 HintMinimum value6). When the inputs A, B, Bin is (0,0,0) then the Difference output of full subtractor is________? 0 1 X All the above Hintproduct with 0 is always.7). When the inputs A, B, Bin is (0,0,1) then the Difference output of full subtractor is________? 0 1 X All the above Hintaddition of 0's with 1.8). When the inputs A, B, Bin is (0,1,0) then the Difference output of full subtractor is________? 0 1 X All the above HintAddition of 0 and 1.9). When the inputs A, B, Bin is (1,0,0) then the Difference output of full subtractor is________? 0 1 X All the above HintAddition of 0 and 1.10). When the inputs A, B, Bin is (0,1,1) then the Difference output of full subtractor is________? 0 1 X All the above HintProduct of any term with 0 is11). When the inputs A, B, Bin is (1,0,1) then the Difference output of full subtractor is________? 0 1 X All the above HintProduct of any term with 0 is?12). When the inputs A, B, Bin is (1,1,0) then the Difference output of full subtractor is________? 0 1 X All the above HintProduct of any term with 0 is?13). When the inputs A, B, Bin is (1,11) then the Difference output of full subtractor is________? 0 1 X All the above Hintaddition of 0's with 1.14). When the inputs A, B, Bin is (0,0,0) then the Borrow output of full subtractor is________? 0 1 X All the above Hintaddition of 0's with 1.15). When the inputs A, B, Bin is (0,0,1) then the Borrow output of full subtractor is________? 0 1 X All the above HintAddition of 0's with 1 is?16). When the inputs A, B, Bin is (0,1,0) then the Borrow output of full subtractor is________? 0 1 X All the above HintAddition of 0's with 1.17). When the inputs A, B, Bin is (0,1,1) then the Borrow output of full subtractor is________? 0 1 X All the above Hintaddition of 0's with 1.18). When the inputs A, B, Bin is (1,0,0) then the Borrow output of full subtractor is________? 0 1 X All the above Hintproduct with 0 is always.19). When the inputs A, B, Bin is (1,0,1) then the Borrow output of full subtractor is________? 0 1 X All the above HintProduct of any term with 0 is?20). When the inputs A, B, Bin is (1,1,0) then the Borrow output of full subtractor is________? 0 1 X All the above HintProduct of any term with 0 is?21). When the inputs A, B, Bin is (1,1,1) then the Borrow output of full subtractor is________? 0 1 X All the above HintAddition of 0's with 1.22). Which of the following is used to represent full subtractor logical circuits equation? K-map Q-map Graph All the above HintMap that represents logic gates.23). Identify the logical Difference ‘D’ equation obtained for 3bit full subtractor given in below figure?Truth Table A’B’Bin + AB’ B’in + ABBin A’Bin + A’B + BBin A’B’Bin + AB’ B’in A’B’Bin + ABBin HintConsidering all ones by pairing together and obtaining equation.24). Identify the logical Borrow out ‘Bout’ equation obtained for 3bit full subtractor given in below figure? Add description hereTruth Table A’B’Bin + AB’ B’in + ABBin A’Bin + A’B + BBin A’B’Bin + AB’ B’in A’B’Bin + ABBin HintObtained by pairing two 1’s from K-map.25). How many logic gates do a full subtractor requires? 4 5 6 7 HintHas 2 basic logic gates and 1 combination of inverter and basic gate.Full Subtractor Questions and Answers for Exams26). Which of the following gates do full subtractor Difference component requires to obtain output? XOR AND NOT OR HintProvides output as 1 if it has at least single input as 1. Read more about XOR gate.27). Which of the following gates do full subtractor Borrow component requires to obtain output? XOR AND NOT OR All the above HintHas 3 basic gates.28). Which of the following is the first step to obtain Difference equation of full subtractor? Calculate XOR operation on inputs A and B Calculate XOR with Borrow Represent the equation All the above HintOnly single operation to be performed without carry or borrow.29). Which of the following is the second step to obtain Difference equation of full subtractor? Calculate XOR operation on inputs A and B Calculate XOR with Borrow Represent the equation All the above HintPerform with the help of neighbor digit. 30). Which of the following is the third step to obtain Difference equation of full subtractor? Calculate XOR operation on inputs A and B Calculate XOR with Borrow Represent the equation All the above HintFinal step after calculating what should be done next? Read more about Full Subtractor.31). Which of the following is the first step of Borrow equation of full subtractor? Do AND operation of 2 inputs Do XOR operation of 2inputs Do OR operation of 2 outputs of previous step All the above HintPerforms product operation.32). Which of the following is the second step of Borrow equation of full subtractor? Do AND operation of 2 inputs Do XOR operation of 2inputs Do OR operation of 2 outputs of previous step All the above HintPerforms on 2 inputs.33). Which of the following is the third step of Borrow equation of full subtractor? Do AND operation of 2 inputs Do XOR operation of 2inputs Do OR operation of 2 outputs of previous step All the above HintPerforms on 2 outputs.34). The input to full subtractor is in ___ form? Binary Analog Signal Both a and b HintForm of 0's and 1's.35). Which of the following circuit is used in full subtractor? Adder Subtractor Multiplexer Decoder HintUnit that performs deduction process.36). A logical subtractor is classified into ___ types? 2 3 4 5 HintMinimum value.37). Which of the following are the labels of full subtractor inputs? Minuend Subtrahend Borrow All the above Hint3 Components.38. How many logic gates a full subtractors is implemented with? 3 4 5 6 HintDouble the number of gates in 2 half adders.39). Which of the following gate provide difference output of a full subtractor? OR XOR AND NAND HintOutput value of the logic gate is 1 if odd number of 1's exists.40). Which of the following gates provide Borrow out of a full subtractor? OR AND NOT All the above HintBasic logic gates.41). A minuend component of a full subtractor is also called ______? Inverted input Noninverted input Carry input All the above HintA positive terminal also called?42). A Subtrahend component of a full subtractor is also called ______? Inverted input Noninverted input Carry input All the above HintNegative terminal also called?43). The LSB of output obtained from a full subtractor is called ____ component? Inverted input Noninverted input Carry input All the above HintA component that takes output from the resultant and sends input to next component to perform subtraction.44). Which of the following represent the value of signal of a full adder when the input logic is 1? High Low Infinite None of the above HintMaximum value.45). Which of the following represent the value of signal of a full adder when the input logic is 0? High Low Infinite None of the above HintMinimum value.46). Which of the following are the advantages of a subtractor? Simple in design Power saver High speed All the above HintThe advantages of a subtractor includes simple in design, power saver and high speed.47). Which of the following is the disadvantages of a subtractor? Does not require accept borrow input at initial stage Delay while processing High power dissipation All the above HintAll the design parameters.48). Which of the following are the applications of a full subtractor? Computers Microcontrollers Processors All the above HintAll the electronic application. Read more about Microcontrollers.49). Subtractors in computers perform ______operation? Arithmetic Logic Graphical All the above HintAll the ALU and graphical performance.50). Which of the following includes athematic operation? Addition Subtraction Multiplication All the above HintAll the mathematical operation.Full Subtractor Important Questions for Interviews51). Which of the following operation do full subtractors processors do? Compute tables Addresses Points All the above Hintmaximum number of operations.52). Which of the following operation do a full subtractor controllers do? Arithmetic subtraction Timers Program counter All the above HintMaximum number of 53). Which of the following is the 1 st step performed in full subtractor K-map? Choose K-map based on variables availability Find min terms and max terms Place 1’s for SOP Place 0’s for POS HintDraw map.54). Which of the following is the 2 nd step performed in full subtractor K-map? Choose K-map based on variables availability Find min terms and max terms Place 1’s for SOP Place 0’s for POS HintFind terms. Read more about K-map.55). Which of the following is the 3 rd step performed in full subtractor K-map? Choose K-map based on variables availability Find min terms and max terms Place 1’s for SOP Place 0’s for POS HintRepresent binary digit.56). Which of the following is the 4 th step performed in full subtractor K-map? Choose K-map based on variables availability Find min terms and max terms Place 1’s for SOP Place 0’s for POS HintRepresent binary digit.57). Which of the following is the 5 th step performed in full subtractor K-map? Place 1’s for SOP Place 0’s for POS Group terms with rectangle box Represent SOP and POS terms in form of equation HintPair equal digits.58). Which of the following is the 5 th step performed in full subtractor K-map? Place 1’s for SOP Place 0’s for POS Group terms with rectangle box Represent SOP and POS terms in form of equation HintRepresent in equation59). Which of the following is the advantage of a k-map? Simplifies Boolean equations Fewer steps Easy method All the above HintPerforms mathematical tasks.60). Which of the following are the disadvantages of a K-map? Complex process Non unique solution is obtained Difficult method Both a and b HintDifficult to perform.61. Which of the following method do K-map overcomes? Boolean algebra law DeMorgans theorem Graphical representation Both a and b HintMathematical representation62). A K-map is also called as ____? 2D tables 3D tables 4D tables 5D tables HintX and Y coordinates.63). K-map is expressed to the power of n with a base____? 1 2 3 10 HintBinary value.64). While performing subtraction of 1 and 0 the term used is ______? Borrow Carry Output Input Hint0-1+?65). A full subtractor has similar result that of _______? Half adder Half subtractor Full adder Full multiplexer HintPerforms sum of 3 values.66). Which of the following is the symbol for a full subtractor? + - * / HintSubtraction.67). Which of the following operation do a logical gate performs? Arithmetic Logical Boolean All the above HintMathematical operations.68). Which of the following digital components are used while implementing logic gates? Transistors Diodes Resistors All the above HintPassive components.69). When the input signal for a full subtractor is logic 1 it represents the signal is _________? High Low Toggled Both b and c HintMaximum value.70). When the input signal for a full subtractor is logic 0 it represents the signal is _________? High Low Toggled Both b and c HintMinimum value.71). When the input signal for a full subtractor is fluctuating between logic 0 and 1 it represents the signal is__? High Low Toggled Both b and c HintFluctuate value.72). ___ is also know as time independent logic circuit? Digital logic circuit Combinational logic circuit Sequential circuit Both a and b HintElectronic circuit is also named as? Read more about the Combinational logic circuits.73). A combination logic circuit performs ____ operation? Arithmetic Boolean Logical All the above HintAll the electronic circuits representation methods.74). How many methods does a combinational circuit uses? 1 2 3 4 HintBinary value also represented in number as?75). A Boolean type circuit is a combinational ____ type of circuit? Digital Analogue Physics All the above HintElectronic circuit also called?Full Subtractor Quiz Questions and Answers76). In digital electronics Boolean type circuits are represented using _____? Gates Resistors Wires Load HintComponent that acts like switch.77). Which of the following are the examples of Boolean type circuits? AND OR NAND All the above HintDigital gates.78). Which of the following are the applications of Boolean type circuits? Adders Subtractors Multiplexers All the above HintMathematical calculating device. Read more about Multiplexers.79). Which of the following are omitted by Boolean type circuit? Metastability Power consumption Glitches All the above HintError quantities.80). Which of the following parameters are measured using Boolean circuits? Circuit size Alterations made Depth of circuit All the above HintModifications and their impacts.81). Logic gates are implemented using _____? Transistors Diodes Resistors All the above HintPassive components. Read more about Diodes.82). Which of the following are the applications of logic circuits? Registers Multiplexers CPU memory All the above HintComputer components.83). A truth table of any digital gate is used to represent____? Boolean algebra Boolean function Propositional calculus All the above HintRelated to solving digital circuits.84). How many parts a combinational logic circuits are classified? 2 3 4 5 HintDual values.85). Which of the following is the classification of code converter combinational logic type circuit? BCD PLD’s Encoders Adders HintElectronic data representation.86). Which of the following is the classification of data transmission combinational logic type circuit? BCD PLD’s Encoders Adders HintComponent with single input and Multiple outputs.87). Which of the following is the classification of ALU combinational logic type circuit? BCD De-MUX Mux Adders HintPerforms addition.88). How many components do a sequential type digital circuit contains? 2 3 4 5 HintDual 89). The output of combinational logic circuit in a sequential type circuit is given to ____? Memory unit Comparator Input of combinational logic circuit All the above HintComponent that stores data.90). Which of the following are the advantages of a full subtractor? Cascades multiple half subtractors Employs 2’s complement Uses full adder All the above HintComponents that performs logical basic mathematical operation.91). Which of the following components are required for implementing a full subtractor practically? 74LS283N NOT gate Adder All the above HintIC and logic gate.92). A 74LS283N IC is a ___ TTL type chip? Full adder Full subtractor Half adder Half subtractor HintHas minuend as component.93). How many pins do 74LS283N Full subtractor IC has? 5 8 16 32 Hint8+8=?94). Which of the following pin of 74LS283N Full subtractor IC is VCC? Pin 2 Pin 4 Pin 14 Pin 16 HintLast pin.95). Which of the following pin of 74LS283N Full subtractor IC is GND? Pin 2 Pin 4 Pin 8 Pin 16 Hint4+4=?96). Which of the following pin of 74LS04 of NOT gate IC is GND? Pin 2 Pin 4 Pin 8 Pin 7 HintPin before GND pin of IC.97). Which of the following pin of 74LS04 of NOT gate IC is VCC? Pin 2 Pin 14 Pin 8 Pin 7 Hint7+7=?98). How many pins do 74LS04 of NOT gate IC has? 4 5 8 14 Hint7+7=?99). Which of the following is the disadvantage of full subtractor? Absence of borrow bit Complex design Delay All the above HintComplicated task.100). Which of the following is the formula for 2’s complement? 2^n 3^m 10^n All the above HintBinary value also called? Time is Up! Time's up
