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Half Subtractor Question & Answers

November 22, 2021 By WatElectronics

This article lists 100 Half Subtractor MCQs for engineering students. All the Half 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 Half Subtractor.

A subtractor is an electronic component of combinational logic circuit that performs logical subtraction of 2 binary bits and provides output results in the form of borrow and carries bits.

Generally, electronic circuits are digitally represented using logic gates in various forms among which logic gates are used to represent Adders like a half adder, full adder, Subtractors, Multiplexers, and more.

Subtractors are further divided into half and full subtractors. Where a half subtractor performs subtraction of only 2 binary bits with borrow and carries bit as output. It is represented using 3 logic gates NAND, XOR, and NOT.

The advantage of a half subtractor is it is simple in design, requires few logic gates, and low cost. These are deployed in devices such as clocks, digital timers, CPUs, and microcontrollers.

1). A half subtractor is an _____ type of electronic circuit?
HintExample includes Subtractor and Adders.
2). A subtractor performs logical subtraction using ____ symbol?
Hinta-b defines which operation?
3). Which of the following are the components used while performing logical subtraction?
Hinta+b where a, b is? and + is ?
4). From the example a+b=c; identify opcodes?
HintAlphabets.
5). From the example a+b=c; identify operand?
HintAddition symbol.
6). A logical gate performs ____ type of operations?
HintBinary digit representation.
7). A logic gate is implemented using ____?
HintPassive components.
8). How many outputs do a half subtractors obtains on logical operation?
HintBinary number also called?
9). At which condition do Bout (borrow output) is set to “1”, when X and Y are 2 inputs?
HintGreater symbol.
10). Which of the following is the logical formula for half subtractor, when X and Y are inputs and Bout is obtained output?
HintProduct of?
11). What is the value of “D” difference when inputs a,b is provided with logic values “0,0”?
HintMinimum value.
12). What is the value of “D” difference when inputs a,b is provided with logic values “0,1”?
HintMaximum value.
13). What is the value of “D” difference when inputs a,b is provided with logic values “1,0”?
HintMaximum value.
14. What is the value of “D” difference when inputs a,b is provided with logic values “1,1”?
HintMinimum value.
15). What is the value of “Bout” borrow output when inputs a,b is provided with logic values “1,1”?
HintMinimum value.
16). What is the value of “Bout” borrow output when inputs a,b is provided with logic values “0,1”?
HintMaximum value.
17). What is the value of “Bout” borrow output when inputs a,b is provided with logic values “1,0”?
HintMinimum value.
18). What is the value of “Bout” borrow output when inputs a,b is provided with logic values “0,0”?
HintMaximum value.
19). Which of the following is the operation performed during half subtractors difference equation calculation?
HintOutput value of the logic gate is 1 if odd number of 1's exists.
20). Which of the following is the operation performed during half subtractors borrow equation calculation?
HintLogic gates that performs multiplication.
21). K-map is also called as_____?
HintMap that represents logic gates.
Read more about K-map.
22). _____ number of bits are used to perform logical half subtraction using a half subtractor?
HintBinary number also called.
23). Which of the following term defines when a binary digit ‘0’ takes another binary digit ‘1’ to perform logical subtraction?
Hint0-1=?
24). A minunend of a half subtractors is a _____?
HintSupply is give at which end?
25). The output obtained by a full subtractor is similar to _________?
Hint3 bit input.

Half Subtractor Interview Questions and Answers

Read more about Adders.
26). A binary subtractor is generally implemented using ______
Hintwhich operation is performed in a+b?
27). Which of the following logical subtractor equation defines B(bar)+1?
HintSubtraction sign.
28). Which of the following logical subtractor equation defines A –B?
HintTwo operators are used.
29). Which of the following is the output for logic AND gate when input provided is (1,1)?
HintToggle value of 1?
30). How many logical gates are used in a half subtractor?
HintOdd number.
31). Which of the following are the applications of a half subtractor?
HintMathematical operator unit and computer's unit.
32). Which of the following are the advantages of a half subtractor?
HintFactors depending on circuit components and design.
33). Which of the following are the disadvantages of a half subtractors?
HintMinimum bits.
34). K-map was introduced in the year________
HintOdd year.
35). A K-map is a ___ diagram?
HintMap that represents logic gates.
36). Which of the following electronic component performs “A-B”?
HintMinus operation.
37). Which of the following represents half subtractors equation if X and Y are 2 inputs; Z as output?
HintProduct and complement of a term.
38). ____ is labeled as result of 2 bit logical subtraction?38. ____ is labeled as result of 2 bit logical subtraction?
HintSubtraction.
39). A Half subtractor is used in ____ type of electronic circuits?
Hint0's and 1's representation.
40). If 2 inputs are provided to half subtractor, how many outputs are obtained?
HintQuard mean?
41). Which of the following is the equation of half subtractors difference equation, when X, Y are inputs and D is difference?
HintSum.
42). Which of the following is the equation of half subtractors Borrow equation, when X, Y are inputs and B is Borrow?
HintProduct.
43). Which of the following component of logical half subtractor contains 2 gates?
HintMinus operation.
44). The combination of AND and NOT logical gate in a logical half forms which of the following logic gate?
HintUniversal logic gate.
45). What is the output of AND gate when 2 inputs are 0’s?
HintLeast value.
46). What is the output of AND gate when 2 inputs are 1’s?
HintA gates logic when high is represented using?
47). What is the output of AND gate when 2 inputs are 0,1?
HintLeast value.
48). What is the output of AND gate when 2 inputs are 1, 0’s?
HintLeast value.
49). Logic 0 of an logic gate represents signal is _______?
HintMinimum value.
50). Logic 1 of an logic gate represents signal is _______?
HintMaximum value.

Half Subtractor Important Questions for Interviews

51). An XOR gate works similar to ___ type of logic gate?
Hinta+b
52). When two inputs of an XOR gate is logic - 0,1 then its output is _____?
HintMaximum value.
53). When two inputs of an XOR gate is logic – 1,0 then its output is _____?
HintMaximum value.
54). When two inputs of an XOR gate is logic - 0,0 then its output is _____?
HintLeast value.
55). When two inputs of an XOR gate is logic - 1,1 then its output is _____?
HintMaximum value.
56). When an input “logic0” is given to NOT gate then the output obtained is _____?
HintMaximum value.
57). How many NOR gates are required while designing a half subtractor?
HintOdd number.
58). In how many steps a half subtraction design can be performed?
HintEven value.
59). Which of the following is the 1 st step of half subtraction design operation?
HintPerforms on input values.
60). Which of the following is the 2 nd step of half subtraction design operation?
HintRepresent in table.
61). Which of the following is the 3 rd step of half subtraction design operation?
HintRepresent mathematically.
62). Which of the following is the 4 th step of half subtraction design operation?
HintDraw the representation
63). A K-map has ___ number of forms?
HintMinimum value.
Read more about Sum of Product.
64). How steps are required while performing K-map?
HintMaximum value.
65). Which of the following is the 1 st step of K-map?
HintSelecting rows and columns.
66). Which of the following is the 2 nd step of K-map?
HintFinding terms.
67). Which of the following is the 3 rd step of K-map?
HintPerform arithmetic based operation.
68). Which of the following is the 4 th step of K-map?
HintPerform arithmetic based operation.
69). Which of the following is the 5 th step of K-map?
HintPairing process.
70). Which of the following is the 6 th step of K-map?
HintPerform mathematical tasks.
71). Identify the expression for exclusive NOR operation?
HintLogic gate operator symbol.
72). Identify the boolen equation when X, Y are inputs ad f(X,Y) is output from the below image?
Half Subtractor

Half Subtractor

HintOne parameter.
73). Find the minimal term of following K-map?
Half Subtractor

Half Subtractor

HintSum of product.
74). Find the solution for the following Boolean equation "(P+Q’+R’) * (P+Q’+R) * (P+Q+R’)?
HintSOP representation.
75). If A,B are the inputs of a subtractor, and if A=B; what is output value?
Logic Gate Diagram

Logic Gate Diagram

HintMinimum value.

Half Subtractor Quiz Questions and Answers

76). A full subtractors has ____ number of half subtractors?
HintMany values.
77). Which of the following are the components of code converters?
Hint2 Logic gates.
78). Which of the following is the representation of NOR gate?
HintGate that performs logic inverted OR operation.
79). Which of the following requires 2 bits in a half subtractor?
Hint2 values.
80). Which of the following circuits implement combination of memory and logic gates?
HintClassification of logic gates.
81). Which of the following is the component of a practical design circuits?
HintPhysical parameter.
82). Half type subtractors defines 1 as output when_____ is performed?
83). 2 bit type subtraction is performed using______?
HintBinary value is also called?
84). Which of the following gate acts as dual of NAND?
HintGate that performs product of terms with an inverted output.
85). Which of the following is the primary universal gate?
HintGate that performs product of terms with an inverted output.
86). Which of the following is the secondary universal gate?
HintGate that performs sum of terms with an inverted output.
87). Which of the following is most basic arithmetic operation?
HintPerforms addition.
88). An half subtractor is a building block of performing ____ operation of 2 binary numbers?
HintDigital value representation.
89). Which of the following is added to XOR gate of half subtractor when it doesnot generate carry bit?
HintGate that performs product of terms/
90). A NOT gate used in half subtractor is also called as_______?
HintPerforms opposite of input.
91). Which of the following represent Boolean logic function?
HintClassification of OR, XOR and NAND.
Read more about Boolean function
92). A combinational type logic circuit is also called as _____?
HintWhat is the inverse of frequency.
93). A combinational type logic circuit is designed using _______ methods?
HintPerforms both sum and product operation
Read more about combinational circuits.
94). Which of the following are the functions of combinational type logic circuit?
HintMaximum operation.
95). Which of the following parameter of logic gate is represented using boolean algebra?
HintRaw data.
96). _____ is called the graphical representation of a combinational type logic gates?
HintOR, XOR representation.
97). Combinational circuits are classified in to ____ types?
HintOdd number.
98). Which of the following are the examples of ALU logic circuit?
HintPreforms ALU operations.
99). Which of the following are the examples of data transmission type combinational logic circuit?
HintPerforms mathematical tasks.
100). Which of the following are the examples of combinational type logic circuits?
HintPerforms digital operations.
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