Binary number system basics – UGC NET Question

Statements A, B and D are correct descriptions of how data is represented in binary form in ICT. The binary system does use only the digits 0 and 1, each digit is called a bit, and a byte is generally made up of eight bits. Statement C is wrong because the decimal system is base 10, not base 2. Therefore, the combination that includes A, B and D but excludes C is the correct answer.

Option A:
Option A is correct because it contains exactly the true statements A, B and D. It correctly identifies the digits of the binary system, the term for each binary digit and the usual size of a byte. By excluding the false statement about the decimal system being base 2, it reflects proper understanding of number systems.

Option B:
Option B is incorrect because it omits statement D while including only A and B. Although A and B are true, D is also correct regarding a byte being 8 bits. Since one correct statement is left out, this option does not capture the full set of true statements.

Option C:
Option C is incorrect because it includes statement C along with B and D. Statement C incorrectly labels the decimal system as base 2, so including it mixes true and false information. A valid combination must exclude this incorrect statement.

Option D:
Option D is incorrect because it assumes all four statements are correct. By including statement C, which misrepresents the base of the decimal system, this option fails to meet the requirement of containing only accurate statements.