I do not understand the question. If you mean to ask if computers use ones and zeros to store and process information, then you need to realize that 1 and 0 are simply used to help people understand the various complex processes of a computer. Saying a computer uses one and zero is just another way to say that something is either on or off, full or empty or closed or opened. A "one" on a hard drive gives off a different magnetic signal than a "zero".
You, as a programmer, can use a string with 1s and and 0s (or any other content) in each and every programming language.
Everything. As far as the computer is concerned, everything is 1s and 0s.
Don’t know
The keyword contains an even number of 0s or exactly two 1s.
1s and 0s.
1
Binary
a bit is represented as 1s and 0s.
Binary
Yes.
A byte.
9's complement of a decimal number represented in 2421 code is easily obtained by replacing the 1s with 0s,and 0s with 1s,so 2421 code is called a self complementing code.example-2421 of '2' is '0010',after replacing the 0s with 1s and 1s with 0s weget '1101' which is the 2421 of '7'(9s complement of 2 is 7). Thus 2421 code is self complementary.