Question

Which of the following is the correct representation of a binary number?

(a) (124)2

(b) 1110

(c) (110)^2

(d) (000)2

This question was addressed to me during an interview.

I'd like to ask this question from The Binary Number System in division Number Systems of Computer Fundamentals

Answer 1

Right answer is (d) (000)2

To explain: The binary numbers should comprise only two digits 0 and 1.

Also, for the base, the value should be 2 and it should be written as a subscript enclosing the entire number.  Here, the fourth option gives the correct representation.