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Lesson # 3
Using Block Explorers to Read and Verify On-Chain Data
Blockchain Basics
1. What is the primary purpose of a block explorer like Etherscan or Solscan?
A. To buy and sell tokens
B. To view blockchain transactions and wallet activity
C. To mine new coins
D. To convert crypto to fiat
2. Which of the following is NOT something you can typically do on Etherscan?
A. Check transaction history of a wallet
B. View smart contract source code
C. Send tokens to another wallet
D. Access someone else’s private key
3. Why might tracking whale or developer wallets be useful?
A. To stake directly into their wallet
B. To detect large market moves or early protocol changes
C. To recover lost tokens
D. To apply for a job
4. What does the “Input Data” section of a transaction on Etherscan show?
A. The private key used to sign the transaction
B. The smart contract function and parameters used
C. The seed phrase of the wallet
D. The NFT image involved in the transaction
5. When analyzing a DeFi transaction on Etherscan, what can the “Logs” section reveal?
A. What validator approved the block
B. Specific events like token transfers, approvals, or liquidity deposits
C. If the user is verified on KYC
D. Total gas fees on all chains