Discussion :: Computer Fundamentals  Section 1 (Q.No.7)
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7.  Which of the following is the 1's complement of 10? 

Answer: Option A Explanation: No answer description available for this question.

Soumya said: (Apr 1, 2011)  
IN ONE'S COMPLEMENT EVERY ZEROS ARE REPLACED BY 1 AND VICE VERSA EXAMPLE: 100 ANSWER: 011 IN THIS EXAMPLE 1 IS REPLACED BY 0 AND 0 IS REPLACED BY 1 
Sudha said: (May 4, 2011)  
Thnks for the Explanation and its v short and cute :) 
Sathiya said: (Sep 6, 2011)  
In One's complement replace the opposite value in the given number. To allow only 0 or 1 only. if 0 means to replace 1 and 1 means to replace 0.... Example the 1's complement of 1010 Ans: 0101 
Vivek Patel said: (Sep 19, 2011)  
1's complement of 10 is 01 
Deepak said: (Oct 19, 2011)  
Simple rule for complements is that : Replace 1 by 0 and 0 by 1. Eg: 1's complement of 1001 will be 0110. 
Simi said: (Nov 8, 2011)  
Rules for 1s complement is that replacing 1 by 0 and 0 by 1, or another method is that subtracting number to be complemented by 11, genarally number of ones is taken depends on the number of digits in the paritular number. 
Raghupathi said: (Nov 29, 2011)  
It is very easy to write 1s' compliment write 1 where it is 0 and VICE VERSA. 
Bibhuprasad Sahoo said: (Feb 15, 2012)  
In one's complements of a binary number, the easiest method is just replace 1 by 0 and 0 by 1. Thats all. 
Basant Rajak said: (Feb 23, 2012)  
In one's complement method simply 1 is replaced by 0 and 0 is replaced by 1 thats all. 
Jagadish said: (Jun 18, 2012)  
In computer terminology complement means 0 replace 1 and 1 replace 0. 
Ravi Yadav said: (Jun 19, 2012)  
For 1's complement we change 1=0 and 0=1. And for 2's complement we add 1 in 1's complement. 
Sanoop Kumar said: (Jul 10, 2012)  
Its simple, In one's complement method 1 is replaced by 0 and 0 is replaced by 1, Example : 1010. Answer : 0101. 
J.Rupa said: (Aug 30, 2012)  
In 1's complement 0 is replaced by 1 and 1 is replaced by 0. So the answer for 10 is 01. 
Manoj said: (Sep 8, 2012)  
In 1's complement 0 is replaced by 1 and 1 is replaced by 0. 
Moin Pathan said: (Mar 11, 2013)  
In 1's complement every 1's are replaced by 0's and every 0's are replaced by 1's. :). 
Mangesh S. Gaikwad said: (Apr 17, 2013)  
It is very easy to write 1's complement. Rule for complements is that:1 is replace by 0 & 0 is replace by 1. For EX.: 101010 Answer: 010101 
Arunima said: (Jul 28, 2013)  
How can one be sure that the number 10 is a decimal or a binary? 
Joseph said: (Dec 6, 2013)  
Complement of a decimal point and a negative number. Please help. 
Urvashi said: (Jan 14, 2014)  
I agree with @Arunima. I would have marked none of these since I took it to be decimal 10. 
Shivam Gupta said: (Feb 24, 2014)  
1's comp work with on and off so the 0 change will be 1 and 1 will be change in 0. 
Vanmathi said: (May 27, 2014)  
Explain the 2's complement and example? different b/w the 1's and 2's complement? 
Riya said: (Sep 14, 2014)  
Yes it is a very easiest way to remember for all that the replacement of 1 by O & viceversa. 
Pooja Sharma said: (Oct 6, 2014)  
0 complement 1 and 1 complement 0 always. 
Richa said: (Nov 8, 2014)  
Please explain how option A is correct? 
Suma said: (Jan 22, 2015)  
1's coplement of 10 is 01. 
Mothukuri Siva Krishna said: (Feb 2, 2015)  
Reversing Digits with compliments 01 and 10 for binary numbers. 
Bharat said: (Feb 14, 2015)  
First Complement of : 10 is 01, 110 is 001, 000 is 111. Binary to Decimal Convert 128 64 32 16 4 2 1 Decimal. 0 0 0 0 0 1 0 = 2. 0 0 0 0 1 1 0 = 4+2 = 6. Thanks. 
Sarfraz said: (Apr 12, 2015)  
For obtained the first complement two steps are required. 1. Replace 0 to 1. 2. Replace 1 to 0. E.g 100 to 011. 
V.Viswanath said: (Jun 8, 2015)  
Complement is a very easy 1 replaced by 0, 0 replaced by the 1. 
K.Jyothi said: (Jun 25, 2015)  
We can replace 0 as 1 and 1 as 0. 
Sanjay said: (Jul 22, 2015)  
What would be result if we say 0's complement? 
B.Abraaham said: (Jul 25, 2015)  
Very good explanation. 
Irfan said: (Sep 7, 2015)  
Where we use this ones and zero's complement? Please explain. 
Arnav said: (Oct 22, 2015)  
Simply add 1 to the code. 
Karri Jagapathibabu said: (Mar 12, 2016)  
Example of 2nd complement. 
Hari said: (Mar 20, 2016)  
Like DNA complement 0 is complement to 1, 1 to 0 ? 
Sabari said: (Jul 8, 2016)  
I initially think that it's 10 in number. It's a binary number so answer carefully . 
Akhil said: (Aug 3, 2016)  
Very simple, and the answer is 01. 
Minahajhusen Mansuri said: (Aug 17, 2016)  
In One's complement replace the opposite value in the given number. To allow only 0 or 1 only. If 0 means to replace 1 and 1 means to replace 0. 10 binary is 110. So 1's complement is 001. 
Benjo said: (Oct 13, 2016)  
0 = 1 & 1 = 0. 
Ashok Arya said: (Oct 25, 2016)  
1's Complement of 5 is = ? Please derive the solution. 
Annonymous said: (Nov 30, 2016)  
@Ashok. In binary representation 5 is 101. So, complementing the bits we have 010 i.e. 2. 
Chris said: (Jun 7, 2017)  
It is very helpful, Thanks for the given explanation. 
Sajal said: (Jun 30, 2017)  
Where is the need of 1's, 9's, 10's complement? I mean I didn't understand the concept of complements .Please, explain. 
Anuj said: (Jan 18, 2018)  
Just change the 1 with 0 and 0 with 1. 1>0 0>1 So, 10>01. 
Nayana said: (Jul 21, 2018)  
1's complement : It is obtained by changing all 1's to 0's and al 0's to 1's. Example : 0110. It's 1's complement is 1001. 
Gopal said: (Feb 1, 2019)  
Let me know about 2's complement in easy method. Please, anyone help me. 
Sachin said: (Mar 21, 2019)  
@Gopal. For 2's complement, we first find 1's complement and then add 1 in that number. Eg: We have a binary number 0111, 2's complement = [1's complememt] + 1 . 1's complement = 1000, now add 1, 1000 + 1 =========== 1001 =========== 
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