EMT Practice Test

1. Question Content...

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Question1: Which of the following blockchains separates transaction validation and ordering of transactions in blocks into separate steps?

Question2: Which of the following blockchains does NOT use broadcast communications?

Question3: Which of the following is a takenaway from the pigeocoin/Bitcom Core hack?

Question4: Which of the following is designed to allow someone to prove they know a secret without revealing it?

Question5: Implementing data access as a blockchain smart contract is a good solution for generating an audit log of access to sensitive data

Question6: A blockchain-based solution best achieves which of the following goals?

Question7: Data subject to deletion procedures should be stored encrypted on-chain.

Question8: Scanning against a list of common vulnerabilities is an important component of smart contract auditing.

Question9: A controversial update to blockchain functionality could increase the vulnerability of the blockchain to attack

Question10: Which of the following blockchains has a built-in consensus algorithm?

Question11: Which of the following attacks takes advantage of the fact that transaction information is posted on the blockchain to infer sensitive information?

Question12: This sample code is vulnerable to which of the following attacks?

Question13: Proof of Work never guarantees that the blockchain network has reached consensus

Question14: Which of the following are necessary properties for a cryptographic hash function to be secure? Select all that apply

Question15: The List hack demonstrated that biockchains using short addresses are exploitable

Question16: Which of the following are shared benefits of private and permissioned blockchain architectures? Select all that apply.

Question17: Which of the following are good ways to get pseudo-random numbers for smart contracts?

Question18: Blockchain consensus algorithms use the scarcity of a resource and economic incentives to protect the security of the distributed ledger.

Question19: Which of the following attacks were enabled by design decisions made by the blockchain's developers? Select all that apply

Question20: Which of the following biockchains uses a channel-focused architectural design?

Question21: This sample code is vulnerable to which of the following attacks?

Question22: Which of the following smart contract vulnerabilities can cause a smart contract's balances ledger to become incorrect? Select all that apply

Question23: Which type of blockchain is most vulnerable to traditional Denial of Service attacks?

Question24: Poorly designed smart contracts can only be disabled on the blockchain if this functionality was built in from the beginning

Question25: This sample code is vulnerable to which of the following attacks? Select all that apply.

Question26: The decentralization of the blockchain makes it immune to traditional Denial of Service attacks

Question27: If an attacker can find two values that hash to the same output what is it called?

Question28: Transactions can be added to DAG-based distributed ledgers without being validated but the same is not true for blockchain.

Question29: Sidechains can benefit the mainchain in what ways? Select all that apply

Question30: Which blockchain security control either risks centralization or permanently divergent chains?

Question31: Which of the following blockchains is designed to allow multiple blockchains to run on the same network?

Question32: From a business perspective, which of me following is the major consideration regarding the use of smart contract technology?

Question33: Which of the following blockchain consensus algorithms is the most sustainable long-term?