Copy of Blockchain Architecture 201 Module 1 Quiz

What is a critical aspect to remember about smart contract security?

Security is proactive, not reactive.
Security threats and vulnerabilities are static and do not change.
Staying up to date on the latest vulnerabilities and security best practices is crucial.
Smart contract code cannot be sandboxed on nodes.

What is a reentrancy attack in smart contract development?

What is the primary defense against front running in blockchain?

How can developers avoid integer overflow and underflow in Ethereum smart contracts?

What led to the Hedick Attack on the Hedick blockchain?

What can result from creating large blocks that exceed the gas limit in a blockchain network?

What is the default visibility setting for functions in many blockchain platforms?

How can timestamp manipulation be avoided in blockchain solutions?

What is a fifty-one percent attack in a proof-of-work blockchain?

An attack where fifty-one percent of the nodes are offline.
An attacker controls fifty-one percent or more of the network's processing power.
An attack that causes a fifty-one percent increase in transaction fees.
A synchronization issue affecting fifty-one percent of transactions.

What is a common mitigation for replay attacks in blockchain platforms?

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