Which term functions as a medium of exchange in digital form?

• A. Blockchain
• B. Cryptocurrency
• C. Big Data
• D. Passwordless Authentication

Answer: (B)

Digital money used as a medium of exchange is the idea behind this question. Cryptocurrency fits this role because it is a digital asset designed to be exchanged for goods and services and transferred directly between parties. It relies on a decentralized ledger (often a blockchain) that records transactions securely, allowing people to transact without a central authority. The blockchain is the technology that enables this, not the currency itself. Big Data is about analyzing large datasets, not a form of money. Passwordless authentication focuses on login security, not value transfer. So, cryptocurrency is the correct term because it functions as digital money intended for use in transactions.