blockchain cbsp practice test

Quantum computers threaten traditional cryptography because they provide polynomial solutions to
mathematically "hard" problems

• A. True
• B. False

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

• A. True
• B. False

Which smart contract auditing strategy determines the inputs that will cause different parts of the
code to run?

• A. Symbolic Execution
• B. Taint Analysis
• C. Dynamic Code Analysis
• D. Control Flow Analysis

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

• A. Confidential Transaction
• B. Ring Signature
• C. Zero-Knowledge Proof
• D. Stealth Address

In which of the following attacks targeting Proof of Stake does an attacker create a divergent chain
and race to make their chain longer than the real chain?

• A. Selfish Mining Attack
• B. Long-Range Attack
• C. Double-Spend Attack
• D. 51% Attack

Which type of attack misuses Internet protocols to attack the blockchain? Select all that apply.

• A. Denial of Service
• B. Eclipse
• C. Sybil
• D. Routing

Which of the following are common inputs to the algorithm to select the next block creator in Proof
of Stake? Select all that apply

• A. Age of User Account
• B. Time Since Last Chosen to Create a Block
• C. Stake Size
• D. User Activity on the Blockchain

Which algorithm was adopted by Bitcoin's creator for use as a consensus mechanism?

• A. Proof of Stake
• B. Proof of Space
• C. Proof of Work
• D. Proof of Activity

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

• A. Ethereum
• B. Corda
• C. Hyperledger

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

• A. Bad Randomness
• B. Reentrancy
• C. Arithmetic
• D. Unchecked Return Values