BLOCKCHAIN - BTA Certified Blockchain Developer - Ethereum Set 1

it always produces the same output given the same input. ✘ it uses equally distributed data to produce the output given a long input. ✘ it shouldn't be possible to re-generate the input given the output. ✘ A

1 Ether = 10^18 wei, 10^9 Gwei, 10^3 Finney ✘ 1 Ether = 10^19 wei, 10^13 Gwei, 10^3 Finney ✘ 1 Ether = 10^16 wei, 10^13 Gwei, 10^3 Finney ✘ 1 Ether = 10^18 wei, 10^6 Gwei, 10^6 Finney ✔ A

To Protect the Public Keys by being cryptographically significant. ✘ To Sign Transactions And To Derive an Address From. ✘ To Generate An Address which can sign transactions. ✘ B

The Public Key is for Signing Transactions, the Private Key must be given out to verify the signature. ✘ The Private Key signs transactions, the Public Key can verify the signature. ✘ The Private Key is to generate a Public Key. The Public Key can sign transactions, the address is here to verify the transactions. ✘ B

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. ✘ PoW is better than PoS, because with PoS we increase the amount of energy spent on the network. ✘ 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 fromStack. ✘ 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. ✘ are bound to a private key which is necessary to sign transactions outgoing from that account. ✘ are logical opcodes running on the ethereum blockchain very similar to smart contracts. ✘ B

are always living on the same address, because the blockchain is deterministic. So, one account can always have one smart contract. ✘ are having the same address as the EOA. ✘ are sitting on their own address. The Address is created from the nonce and the EOA address and could be known in advance before deploying the smartcontract. ✘ the address of the smart contract is a random address which gets generated by the miner who mines the contract-creation transaction. ✔ C

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

to Wei, so it will send the equivalent of 10^18 Wei. ✘ to Finney, so it will send the equivalent of 10^3 Finney. ✘ to Szabo, so it will send the equivalent of 10^6 Szabo. ✘ A

Keccack256 while internally to hash values it's easy to use the Dagger-Hashimoto to create a meaningful hash. ✘ the Dagger-Hashimoto hashing while internally the EVM uses SHA256 which is an alias for Keccack256. ✘ the Dagger-Hashimoto hashing while internally the EVM uses Keccack256 which is almost similar to SHA256, but has a different padding so produces differenthashes. ✘ C