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Basic Computer/IT QUESTION #2592
Question 1
The binary system is the communication language of computers. Which of the following correctly describes it?
  • A system using digits 0 through 9 for all calculations
  • A base-2 numeral system that uses only the digits 0 and 1✔️
  • A system that uses letters A through F alongside numbers
  • A system that uses 10 different signal levels to store data
Correct Answer Explanation
The binary system, also known as the base-2 numeral system, uses only two digits: 0 and 1. Computers use binary because electronic circuits can easily represent two states — OFF (0) and ON (1).