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Basic Computer/IT QUESTION #11540
Question 1
Which of the following values is invalid in the binary number system?
  • 001
  • 101
  • 202✔️
  • 110
Correct Answer Explanation
202 is NOT a valid binary number. Binary (base-2) uses only digits 0 and 1. The digit '2' does not exist in binary. Valid binary numbers from options: 001 (decimal 1), 101 (decimal 5), and 110 (decimal 6). Binary is computers' native number system — electronic circuits have two states: on (1) and off (0).