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Exam contains 99 questions

Page 2 of 17

Question 7 🔥

What's the correct scientific notation?

Which database solution meets these requirements?

A. 1 Ether = 10^18 wei, 10^9 Gwei, 10^3 Finney

Highly voted

B. 1 Ether = 10^19 wei, 10^13 Gwei, 10^3 Finney

Highly voted

C. 1 Ether = 10^16 wei, 10^13 Gwei, 10^3 Finney

Highly voted

D. 1 Ether = 10^18 wei, 10^6 Gwei, 10^6 Finney

Highly voted

Discussion of the question

Question 8 🔥

What are Private Keys used for?

Which database solution meets these requirements?

A. To Protect the Public Keys by being cryptographically significant.

Highly voted

B. To Sign Transactions And To Derive an Address From.

Highly voted

C. To Generate An Address which can sign transactions.

Highly voted

Discussion of the question

Question 9 🔥

Public Keys vs. Private Keys. Which statement is true?

Which database solution meets these requirements?

A. The Public Key is for Signing Transactions, the Private Key must be given out to verify the signature.

Highly voted

B. The Private Key signs transactions, the Public Key can verify the signature.

Highly voted

C. The Private Key is to generate a Public Key. The Public Key can sign transactions, the address is here to verify the transactions.

Highly voted

Discussion of the question

Question 10 🔥

Proof of Work (PoW) vs. Proof of Stake.

Which database solution meets these requirements?

A. PoW is computationally intensive which requires lots of energy. On the other hand, miners earn straightforward a reward for mining a block and incorporating transactions.

Highly voted

B. PoW is better than PoS, because with PoS we increase the amount of energy spent on the network.

Highly voted

C. PoS is mining with specialized new hardware that has to be purchased with a stack of Ether in the network. Hence the Name: Proof of Stake, which derives from Stack.

Highly voted

Discussion of the question

Question 11 🔥

Externally Owned Accounts:

Which database solution meets these requirements?

A. can be destroyed using the selfdestruct keyword. This way all remaining ether will be sent to the receiver address, regardless if they have a fallback function or not.

Highly voted

B. are bound to a private key which is necessary to sign transactions outgoing from that account.

Highly voted

C. are logical opcodes running on the ethereum blockchain very similar to smart contracts.

Highly voted

Discussion of the question

Question 12 🔥

Consensus is reached:

Which database solution meets these requirements?

A. by the miner nodes which make sure that a transaction is valid.

Highly voted

B. by every single node in the blockchain network executing the same transaction.

Highly voted

C. by a cryptographic secure signature algorithm called ECDSA which makes sure that cheating is impossible.

Highly voted

Discussion of the question

Ready to Pass Your Certification Test

blockchain CBDE

Exam contains 99 questions

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