第 1 题
1 分Which of the following best defines the concept of a digital currency?
Cambridge IGCSE · Computer Science (0478)
Digital currency：练习题
5 道选择题即时批改，另有 5 道文字题附完整解题步骤，全部围绕「Digital currency」。
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第 2 题
1 分What role does time-stamping play in a blockchain ledger for digital currency?
第 3 题
1 分Which of the following best explains why a blockchain is described as "distributed" in most digital currency systems?
第 4 题
1 分Which statement best describes a key characteristic of the records held within a blockchain?
第 5 题
1 分Why is blockchain referred to as a "distributed ledger" in the context of digital currency?
第 6 题
2 分State the primary characteristic that distinguishes a digital currency from traditional physical currency.
先自己写一遍答案，再对照解题步骤。
第 7 题
4 分Explain why a blockchain is referred to as a "time-stamped series of records that cannot be altered."
先自己写一遍答案，再对照解题步骤。
第 8 题
6 分In the context of digital currency, explain how a decentralized digital ledger prevents the "double-spending" problem without a central authority.
先自己写一遍答案，再对照解题步骤。
第 9 题
2 分Digital currencies are becoming more common in global finance.
a) Define the concept of a digital currency.
b) State one characteristic of a digital currency that distinguishes it from traditional physical currency.
先自己写一遍答案，再对照解题步骤。
第 10 题
4 分A blockchain is used to track digital currency transactions.
a) Explain why a blockchain is considered to be immutable (cannot be changed).
b) Describe the role of a digital ledger in the context of digital currency.
先自己写一遍答案，再对照解题步骤。
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