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:
55 comments Page 2 of 6.
Rahul said:
10 years ago
The negative number always represent in 2's complement form. So after calculating 2's complement of the above binary number, it is always negative. So the D option is correct.
Selvamani Kannan said:
9 years ago
For a two's compliment, we add +1 with the ones compliment.
So, from two's compliment to one's compliment we have to subtract -1.
I think +27 is correct.
So, from two's compliment to one's compliment we have to subtract -1.
I think +27 is correct.
Nikhil said:
9 years ago
Msb bit decides the sign of the number. After finding the 2's compliment the msb bit is 0, hence the negative sign. If it was 1 it would hav been +27.
Sneha said:
9 years ago
If carry is generated find 2's complement of the answer to get final result,
If carry is not generated give negative sign and write the value.
If carry is not generated give negative sign and write the value.
Abhishek B Revankar said:
7 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)
Chandu said:
6 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)
Sai said:
1 decade ago
Given A = 11100101.
2's comp A' = A + 1 = 00011011.
Why did you consider from A? Why didn't you consider from A' I mean sign.
2's comp A' = A + 1 = 00011011.
Why did you consider from A? Why didn't you consider from A' I mean sign.
Sita said:
1 decade ago
In the given binary form msb bit is 1 should keep '-' sign. Msb bit is 0 then you should keep positive sign.
Priyajit Pal said:
9 years ago
Negative numbers are always represented in 2's compliment form. That's why the original no must be negative.
SELVA GANESH.V said:
6 years ago
A = 11100101.
Therefore A = 00011010 and A' = A + 1 = 00011011 = 16 + 8 + 2 + 1 = 27.
Therefore A = -27.
Therefore A = 00011010 and A' = A + 1 = 00011011 = 16 + 8 + 2 + 1 = 27.
Therefore A = -27.
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