A computer stores data in binary.
Identify the number of bits in one kibibyte.
Mark scheme
- C 8192 (1)
- The only correct answer is C. The correct answer is 8192.
- A is not correct because 1024 is the number of bytes in a kibibyte
- B is not correct because 8000 is the number of bits in 1000 bytes
- D is not correct because 8 388 608 is the number of bits in a mebibyte
Example answers and how they were marked
Full marks1/1
C 8192
Why: Correct: one kibibyte is 1024 bytes and 1024 × 8 = 8192 bits (1).
No marks0/1
A 1024
Why: Near miss: 1024 is the number of bytes in a kibibyte, not the number of bits (0).
No marks0/1
B 8000
Why: Typical misconception: uses 1000 bytes for a kibibyte, giving 1000 × 8 = 8000 bits (0).