True or false about blockchain

Exercise and reference answers

Questions

1. Statement is true

   No

   Statement

   Blockchain uses one central database.

2. Statement is true

   Yes

   Statement

   Each node holds a full copy of the database.

3. Statement is true

   Yes

   Statement

   The ledger is append only.

4. Statement is true

   No

   Statement

   One node alone can approve a transaction.

5. Statement is true

   Yes

   Statement

   Digital currency is its most popular use.

Instructions

Decide whether each statement is true or false.

Explanation