Answer the following True/False questions.

1. (T/F) Bitcoin address doesn't reveal who the owner of the address is.
2. (T/F) Each person can have at most one bitcoin address.
3. (T/F) Authenticity of a transaction is provided by a digital signature scheme.
4. (T/F) Bitcoin address has nothing to do with a digital signature scheme.
5. (T/F) A bitcoin address can be longer than some other bitcoin addresses.
6. (T/F) Bitcoin provides privacy of transactions by keeping them hidden from the public.
7. (T/F) The global ledger is append only. It's impossible to delete some blocks in it.
8. (T/F) Each block contains exactly one transaction.
9. (T/F) For each block, there exists only one nonce (i.e., proof of work) that will cause the block to be valid.
10. (T/F) The difficulty level indicates how many leading 0's the hash of the block should start with.
11. (T/F) The difficulty level doesn't change over time.
12. (T/F) The prevHash of a block (except the genesis block) must start with some 0s.
13. (T/F) When all coins have been mined, miners will no longer be incentivized to add blocks to the chain, and the bitcoin system will stop working.

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