CBSP : BTA Certified Blockchain Security Professional Exam

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Question: 11
The Bitcoin hack demonstrated that there are circumstances in which the principles of blockchain must be violated to protect the blockchain.
1. True
2. False
Answer: A Question: 12
Blockchain technology is designated to be self-contained with no interaction with external components.
1. True
2. False
Answer: B Question: 13
Which types of network attacks focus on partitioning the blockchain network? Select all that apply
1. Eclipse
2. Sybil
3. Denial of Service
4. Routing
Answer: A,B,C Question: 14
Both sidechains and slate channels rely on the original blockchain for security and as a fallback if issues occur.
1. True
2. False
Answer: B Question: 15
In both blockchain and DAG-based distributed ledgers, the trust in all transactions that are part of the ledger Increases as additional transactions are added to the ledger.
1. True
2. False
Answer: A Question: 16
Properly encrypted data stored in the distributed ledger adequately protects data in both the short-term and the long- term
1. True
2. False
Answer: A Question: 17
Which of the following is NOT a common regulatory requirement tor businesses?
1. Data transparency
2. Data encryption
3. Personal data protection
4. Data control
Answer: A Question: 18
Which of the following biockchains uses a channel-focused architectural design?
1. Hyperledger
2. Corda
3. Ethereum
Answer: A Question: 19
The code of smart contracts that are "self-destructed" is no longer visible to the blockchain network
1. True
2. False
Answer: B Question: 20
Malware infections of blockchain nodes can compromise the security of the blockchain's consensus algorithm.
1. True
2. False
Answer: A Question: 21
Sidechains can benefit the mainchain in what ways? Select all that apply
1. Speed
2. Functionality
3. Scalability
4. Security
Answer: B,C Question: 22
Which of the following blockchains has a built-in consensus algorithm?
1. Ethereum
2. Corda
3. Hyperledger
Answer: A Question: 23
Compromising blockchain accounts is beneficial to which of the following types ot attacks?
1. 51% Attack
2. Eclipse Attack
3. Routing Attack
4. Sybil Attack
5. All of the above
Answer: D Question: 24
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?
1. Selfish Mining Attack
2. Long-Range Attack
3. Double-Spend Attack
4. 51% Attack
Answer: B Question: 25
Spinning up a large number of temporary mining servers is likely part of what type of attack?
1. Routing
2. Denial of Service
3. Sybil
4. Eclipse
Answer: C
In which blockchain consensus algorithm does a user pay (give up coin forever) to participate in consensus?
1. Proof of Burn
2. Proof of Work
3. Proof of Stake
4. Proof of Activity
5. None of the above
Answer: A Question: 27
Which of the following is designed to allow someone to prove they know a secret without revealing it?
1. Confidential Transaction
2. Ring Signature
3. Zero-Knowledge Proof
4. Stealth Address
Answer: C Question: 28
Which algorithm was adopted by Bitcoin's creator for use as a consensus mechanism?
1. Proof of Stake
2. Proof of Space
3. Proof of Work
4. Proof of Activity
Answer: C Question: 29
This sample code is vulnerable to which of the following attacks? Select all that apply.
1. Reentrancy
2. Unchecked Return Values
3. Arithmetic
4. Race Conditions
Answer: A,B,D Question: 30
If an attacker can find two values that hash to the same output what is it called?
1. Match
2. Intersection
3. Collision
Answer: C

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