Why is data in a blockchain hard to tamper with?

  1. it is stored on one secret computer
  2. it is written in Python
  3. it is printed on paper
  4. changing a block changes its hash and breaks the links to later blocks across many copies
Answer

D) changing a block changes its hash and breaks the links to later blocks across many copies

Hash links plus distributed copies make tampering detectable. SLO CS-11-E-01

Computer Science MCQ · More Unit 5: Application of Computer Science MCQs · Practise