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 3 of 6.
RAJ said:
8 years ago
At all many have a doubt for the negative sign doubt so I ll try to solve it.
In digital electronics the MSB bit (the leftmost bit) is the sign bit and its negative if it is set to 1 or if it is set to 0 it is positive. So look at the MSB perform the operation and represent it as positive or negative depending on the sign bit.
In digital electronics the MSB bit (the leftmost bit) is the sign bit and its negative if it is set to 1 or if it is set to 0 it is positive. So look at the MSB perform the operation and represent it as positive or negative depending on the sign bit.
Sneha said:
8 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.
Priyajit Pal said:
8 years ago
Negative numbers are always represented in 2's compliment form. That's why the original no must be negative.
Veer said:
8 years ago
How it comes in negative.
Mannu Jha said:
8 years ago
The MSB holds the sign.
Basava Prabhu said:
8 years ago
2's complement means only negitive number. If we take 2's complement of 011 then it means negitive of 011.
SELVA GANESH.V said:
5 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.
Geetha adainjan said:
1 decade ago
2's com -11100101. Then 1's com is 11100101-1=1100100.
Then the required binary no is 0011011. According to binary to decimal conversion the position value is 128, 64, 32, 16, 8, 4, 2, 1 here binary 1 is present in 16+8+2+1=27.
Then the required binary no is 0011011. According to binary to decimal conversion the position value is 128, 64, 32, 16, 8, 4, 2, 1 here binary 1 is present in 16+8+2+1=27.
Sangeetha said:
1 decade ago
The first no 1 indicates the -ve number.
Eshwar said:
1 decade ago
Yes the first num indicates the negative number so the two 's complement must be a positive number right.
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