Cryptocurrency Study Guide 2026
Everything you need to pass the Cryptocurrency exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 Cryptocurrency Exam Format at a Glance
📚 Cryptocurrency Topics to Study (74)
✍️ Sample Cryptocurrency Questions & Answers
1. What is a 'replay attack' in the context of blockchain hard forks?
After a hard fork, a replay attack broadcasts a valid transaction from the original chain on the new chain, potentially draining funds on both chains simultaneously.
2. In a DAO governed by a smart contract, what typically happens when a proposal passes?
On-chain governance contracts automatically execute approved proposals (treasury transfers, parameter changes) after a mandatory timelock period, removing the need for trusted intermediaries.
3. What are sidechains, exactly?
Explanation The correct answer Any mechanism that allows tokens from one blockchain to be securely used within a completely separate Blockchain
4. What is a Dash Masternode and how does it work?
A Dash Masternode is a specialized type of node on the Dash cryptocurrency network that provides advanced services beyond basic transaction processing. These services include InstantSend (instant transactions), PrivateSend (transaction mixing for privacy), and governance functions. Masternodes require a collateral of 1,000 DASH and are rewarded for their services, contributing to the network's security and functionality.
5. What is a '51% attack' in cryptocurrency networks?
A 51% attack occurs when one entity controls the majority of mining power, allowing them to double-spend coins or reverse transactions.
6. What is an Automated Market Maker (AMM) in DeFi?
An AMM uses liquidity pools and mathematical formulas to automatically price and swap assets without needing a traditional order book.