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Exam contains 99 questions

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Question 13 🔥

Transactions containing the same data to create the same smart contract are:

Which database solution meets these requirements?

A. always having the same signature.

Highly voted

B. having a different signature because of the nonce which changes upon every transaction.

Highly voted

Discussion of the question

Question 14 🔥

Sending one Ether is actually internally translated:

Which database solution meets these requirements?

A. to Wei, so it will send the equivalent of 10^18 Wei.

Highly voted

B. to Finney, so it will send the equivalent of 10^3 Finney.

Highly voted

C. to Szabo, so it will send the equivalent of 10^6 Szabo.

Highly voted

Discussion of the question

Question 15 🔥

Hashing Mining uses:

Which database solution meets these requirements?

A. Keccack256 while internally to hash values it's easy to use the Dagger-Hashimoto to create a meaningful hash.

Highly voted

B. the Dagger-Hashimoto hashing while internally the EVM uses SHA256 which is an alias for Keccack256.

Highly voted

C. the Dagger-Hashimoto hashing while internally the EVM uses Keccack256 which is almost similar to SHA256, but has a different padding so produces different hashes.

Highly voted

Discussion of the question

Question 16 🔥

PoS:

Which database solution meets these requirements?

A. would be better, because it can reduce the amount of energy needed for mining.

Highly voted

B. would be worse, because it would increase the amount of energy needed for mining.

Highly voted

Discussion of the question

Question 17 🔥

Externally Owned Accounts (EoA):

Which database solution meets these requirements?

A. are changing their address every time a Transaction is sent because of the nonce.

Highly voted

B. are keeping their address, but on the blockchain a nonce is increased every time they send a transaction to avoid replay attacks.

Highly voted

Discussion of the question

Question 18 🔥

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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