Binary Code quiz

More questions about Binary Code

These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.

1. 1 Easy

   What is the next binary number after 111?

   Answer: 1000

   Why: Adding 1 to 111 carries through all three 1s, just as adding 1 to 999 carries through all three 9s to make 1000.

2. 2 Medium

   About how many GB does Windows show for a 1 TB drive?

   Answer: 931

   Why: Drive makers count a gigabyte as 1,000,000,000 bytes, but Windows divides by 1,073,741,824, so the same bytes look about 7% smaller.

3. 3 Hard

   Which multiple of 0.1 below 1 can binary store exactly?

   Answer: 0.5

   Why: In binary 0.1 repeats forever as 0.000110011..., which is why many programming languages print 0.1 + 0.2 as 0.30000000000000004.

4. 4 Easy

   Which color is the RGB code 255, 255, 0?

   Answer: Yellow

   Why: Screens mix light rather than paint, so red and green add up to yellow, while the same two paints stirred together make brown.

5. 5 Medium

   In what year does 32-bit Unix time run out?

   Answer: 2038

   Why: One second after 03:14:07 UTC on 19 January 2038, the count wraps negative and old systems jump back to December 1901.

6. 6 Hard

   What extra bit lets a receiver spot one flipped bit?

   Answer: Parity bit

   Why: A parity bit reveals that a bit flipped but not which one, and two flips cancel each other out and slip through unnoticed.