Which of the following are good ways to get pseudo-random numbers for smart contracts?
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Correct Answer:
D
Q: 2
Malicious smart contracts can potentially infect the nodes running the blockchain software
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Correct Answer:
A
Q: 3
Digital signatures provide confidentially, integrity , and non-repudiation.
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Correct Answer:
A
Q: 4
Compromising blockchain accounts is beneficial to which of the following types ot attacks?
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Correct Answer:
D
Q: 5
Which of the following attacks takes advantage of the fact that transaction information is posted on
the blockchain to infer sensitive information?
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Correct Answer:
B
Q: 6
The use of Membership Service Providers (MSPs) partially centralizes a Blockchain and increases its
vulnerability to traditional Denial of Service attacks
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Correct Answer:
B
Q: 7
Which types of network attacks focus on partitioning the blockchain network? Select all that apply
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Correct Answer:
A, B, C
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Q: 8
Checkpointing is designed to protect against an attacker exploiting the mechanism by which
blockchain resolves divergent chains
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Correct Answer:
A
Q: 9
Properly encrypted data stored in the distributed ledger adequately protects data in both the short-
term and the long-term
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Correct Answer:
A
Q: 10
A major advantage of a stale channel is that it provides a permanent means of transferring value
between two parties.
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Correct Answer:
A
Q: 11
A blockchain-based solution best achieves which of the following goals?
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Correct Answer:
C
Q: 12
Which smart contract vulnerability allows an attacker to make a profit off a smart contract
cryptocurrency exchange like Bancor?
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Correct Answer:
C
Q: 13
Blockchain consensus algorithms use the scarcity of a resource and economic incentives to protect
the security of the distributed ledger.
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Correct Answer:
A
Q: 14
Which of the following smart contract vulnerabilities can cause a smart contract's balances ledger to
become incorrect? Select all that apply
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Correct Answer:
B, C, D
Q: 15
Which of the following biockchains uses a channel-focused architectural design?
