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Digital Currency (GCSE Computing)

The following is a GCSE Computing test covering 'Digital Currency' from the broader topic 5. The Internet And Its Uses. The test is geared towards the CAMBRIGE-IGCSE exam board style syllabus.
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What is meant by “confirmations” in blockchain transactions?
Which feature of many cryptocurrencies allows anyone to inspect the entire transaction history?
Which option describes a “cold wallet”?
What is the usual name for a purely digital form of money that can be used online and is not issued by a central bank?
Which technology most cryptocurrencies use to record transactions in a distributed, tamper-resistant way?
What is a “stablecoin”?
Which term describes a cryptocurrency designed to keep sender and recipient identities hidden or private?
In public-key cryptography used by many digital currencies, what does a private key do?
What is a “node” in a cryptocurrency network?
Which consensus method requires miners to solve difficult computational puzzles and consumes significant electricity?
Which of the following best explains “smart contracts”?