Practice Problems on Combinational Circuits (Part 3)

Digital Electronics: Practice Problems on Combinational Circuits (Part 3)

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1. pranav satbhai: does X' depict 2's complement of X?
2. hitesh kumar: Option A,
3. nagasowmya sudabattula: Sir in question no.2 why are you taking a=0 directly
4. Utsav Bhandari: OPTION (A) IS THE CORRECT ANSWER!!!
5. Prachi Patwa: Option A!! 😭😭 So Happy! 😌
6. Tanmai Chaudhari: Ans is option (a)
7. Rohit Samineni: A is the answer
8. Sandeep Bal: option a
9. IQBAL AHMAD: Solution is "a"
10. Vedant Gupta: Option A is correct ans
11. hardik gupta: X = Y'C + YC' Y = A'B + AB' Correct option "A"
12. RAHUL RANJAN: A is correct
13. Arvindh Ram: Option : A
14. rakesh padala: question 2:model,home work problem,answer=a xor b xor c
15. srihari ayapilla: yep.
16. Usman khan: A
17. Talha Yaseen: In first ques if Cin = 0, then the circuit will works as full adder. So the correct answer will be option a, (X+Y)
18. amit ray: A
19. rachid bennia: a =Xor (a,b,c)
20. Krupa Makwana: a
21. Govind Kumar: how
22. Prateek Gupta: Option a => A'B'C + ABC + A'BC' + AB'C'
23. arun singh mehra: a
24. Naveen talawar: You have to see the circuit.. in circuit the input of "A" is not connected to any value therefore A = 0.
25. SAIKIRAN BOMPALLY: a
26. Jasmine Verma: Option a
27. Anupam Sen: option A is right
28. Varun Patel: a
29. vijaya Nethala28: Option a is the answer
30. Suwen Li: A
31. xganh zu: i am confused @ 04:13 time mark, i decided to use 2's complement with what Sir is saying, " X' + Y " is subtracting so i make so i make X = 0010 (2) and Y = 0010 (2) so for Cin = 1, Y+ X' = 0010 + 1101 = 1111 (-1) which is not ZERO please help me, i am confused EDIT: i understand X' = 1's complement then u add 1 from Cin to make it 2's complement which is X'=1110 Y = 0010 thus Y+X' = 1110+0010=1(Overflow) =0000 which is correct answer
32. Bhargavi Lakshmi Buppannagari: a
33. Laxmi Thrylokya: answer a)
34. vishal adepu: a
35. Sagar kumar: sir in ques 1 you put the value of B=1' while you assume value as 1 why??
36. zichang wang: how could you guys get A'B'C from expanding (A'B+AB')C?
37. Manikanta M: none,, A XOR B XOR C ,, or A'BC+AB'C+A'BC'+AB'C'
38. talari vinodkumar: a
39. lualatuan: (a) is the answer!
40. Ayan Basak: For 1st problem,how are we converting to 2's complement.Plz explain clearly
41. IMPULSE 15: Answer : b ( for question 1) Since 1 is given to 4 bit adder. So x1 is complemented and then the 1 is added. The final input going in adder is y1 + x1' +1 . so it becomes y1 - x1 (since x1' + 1 is 2s compliment of x1).
42. Arjun Jha: a
43. prince 4s1: hw-ans-(a)
44. vaddadi sree vamsi: a is the answer sir
45. Sachin Raj G.S: A
46. Namir Ashraf: a
47. sushmita nigam: answer is a
48. Shriram G: Option A ,is it Right??
49. Parimeya Ranadive: a
50. Bharat Suthar: corect ans is option (a)
51. Mustafa Saleem: For question number 2 the ans is Y'XE+YX if I am not wrong.......
52. Navreet Kaur: aaaaaaaaaaa
53. jogindra kumar: option (A) IS CORRECT
54. Stark 2248: Ans:a homework
55. Sagar Jawanjal: ans a
56. devesh kumar: b is correct
57. vinod thangirala: a
58. Chandan Kumar: A
59. bhuvnesh tarachandani: sir option (a) is the answer...
60. Sahil Sharma: how option a
61. ARUN DAS: yup that is
62. leena jena: option (a) is correct ans
63. Amit Ambastha: a
64. Other Guy: Option A is the correct answer. Y=A'B+AB' X=Y'C+YC' Substituting Value of Y We get opt (a)
65. Experience World: A is grounded
66. Abhishek Jaiswal: a
67. Anju Sai Sree Gudise: sir in first question that is 1s complement na??
68. Sahil Sharma: Y=A'B+B'A X=Y'C+C'Y But Y' is coming to be 0 plz anybody clear my doubt
69. Surindersingh Dhaliwal: the correct ans is A.
70. Neso Academy: I've explained it clearly while teaching it and thus there is no point to go through the complete explanation. Please watch the lectures following the playlist https://www.youtube.com/playlist?list=PLBlnK6fEyqRjMH3mWf6kwqiTbT798eAOm
71. MANJEET SINGH: ans is a .
72. Varun Kumar: Option b is correct..Y = A xor B ...the X= Y xor C ...X= A xor B xor C..which is option b ..when expanded..
73. RMAnimations: a
74. pasupuleti pasupuleti: opt..a for homework problem.
75. Himanshi Swarooop: a
76. Anita Sharma: Sir,in Q no. 2,while finding the o/p f,how are you directly saying that "a" is zero in c'b+ac
77. Pritesh shah: Answer is A)
78. Naveen talawar: You have to see the circuit. In the circuit, the input to A is not connected to any value therefore it is taken as 0.
79. Shahidul Islam Majumder: HW answer A.
80. SHAMSHEER ALAM: a is correct answer
81. keshav Tangri: i got my answer as A
82. Ujjval Patel: #include int main() { printf("Correct ans is 'A'"); return 0; }
83. mohamed said: a    is    the correct answer 
84. Shankar Kumar: Sagar kumar by mistake 😀
85. Rushi Bhatt: A xor B xor C (a)
86. Gurjot Singh: are u able to find out answer of ur question? i am also having the same question
87. ninja 8750: A
88. Vinay Pant: A
89. vishakha jadhav: a)
90. pranav satbhai: option a
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Practice Problems on Combinational Circuits (Part 3)
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