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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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Which technology most cryptocurrencies use to record transactions in a distributed, tamper-resistant way?
Which term describes a cryptocurrency designed to keep sender and recipient identities hidden or private?
What does KYC (Know Your Customer) typically require when using regulated crypto services?
Which function does hashing serve in many cryptocurrency systems?
What is a “hot wallet”?
Why are private keys essential for cryptocurrency security?
What is the main difference between a fiat currency and most cryptocurrencies?
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?
What does “gas” refer to on the Ethereum network?
What is a “node” in a cryptocurrency network?
Which of these is a common risk when using online cryptocurrency exchanges?