Electronics and Communication Engineering - Digital Electronics - Discussion
Discussion Forum : Digital Electronics - Section 1 (Q.No. 7)
7.
In 2's complement representation the number 11100101 represents the decimal number
Answer: Option
Explanation:
A = 11100101. Therefore A = 00011010 and A' = A + 1 = 00011011 = 16 + 8 + 2 + 1 = 27. Therefore A = -27.
Discussion:
54 comments Page 1 of 6.
Anonymous said:
6 years ago
Explanation and answer are wrong.
Number with Most Significant digital represents a negative number i.e.
-1*128+1*64+1*32+0*16+0*8+1*4+0*2+1*1.
=-128+64+32+4+1=-27 (which is original number).
Now, 2's complement of the number will be:
1's C: 00011010.
2's C: 00011011.
Binary Equivalent: 16+8+2+1=27 (which is required answer).
Number with Most Significant digital represents a negative number i.e.
-1*128+1*64+1*32+0*16+0*8+1*4+0*2+1*1.
=-128+64+32+4+1=-27 (which is original number).
Now, 2's complement of the number will be:
1's C: 00011010.
2's C: 00011011.
Binary Equivalent: 16+8+2+1=27 (which is required answer).
(8)
Chandu said:
5 years ago
I think in any condition the 1st bit indicates sign of that number and 0 indicates positive sign and 1 indicates negative sign.
(5)
Akhilesh prajapati said:
5 years ago
The Answers Should be C.
(4)
Aparna said:
7 years ago
I can't understand it clearly, Please give me the explanation in detail.
(2)
Maham Fayyaz said:
4 years ago
Negative signed indicates the signed Binary numbers as we take compliment of only -ve signed numbers.
(1)
Muthupandi said:
7 years ago
I am not getting this, please anyone explain me.
(1)
Abhishek B Revankar said:
6 years ago
Carry 1 indicates a positive number.
Carry 0 indicates a negative number.
Hence after adding 1 to the complement, the carry remains 0.
Carry 0 indicates a negative number.
Hence after adding 1 to the complement, the carry remains 0.
(1)
Anubhav Dandapat said:
6 years ago
Is the 1's complement and 2's complement are the complement each other?
Because the procedure is same, if we find the 2's complement we use the same procedure and here also use the same procedure.
Because the procedure is same, if we find the 2's complement we use the same procedure and here also use the same procedure.
(1)
Zain said:
9 years ago
It should be +27.
Arindom said:
9 years ago
Iy should be +27 because the msb obtain after the calculation is 0 which indicates its sign bit as +ve.
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