ExamGecko
Login
Home / Blockchain / CBDE / List of questions
Ask Question

Blockchain CBDE Practice Test - Questions Answers, Page 4

List of questions

Question 31

Report Export Collapse

When a new block is mined:

a list of transactions as well as uncles is incorporated in the block. All gas that is used during those transactions is added to the miners' balance. Also, the block reward is added to the miner. Then the same transactions are run again byevery participating node in the network to achieve consensus.
a list of transactions as well as uncles is incorporated in the block. All gas that is used during those transactions is added to the miners' balance. Also, the block reward is added to the miner. Then the same transactions are run again byevery participating node in the network to achieve consensus.
a list of transactions is incorporated in that block. Gas used during the execution is attached to the executing contracts while the block reward is automatically spread across the mining pool to ensure a fair spread. Consensus is reachedby a special form of hash code.
a list of transactions is incorporated in that block. Gas used during the execution is attached to the executing contracts while the block reward is automatically spread across the mining pool to ensure a fair spread. Consensus is reachedby a special form of hash code.
Suggested answer: A
asked 16/09/2024
Timothy Luisterburg
35 questions

Question 32

Report Export Collapse

A Blockchain Node:

can never become a mining node.
can never become a mining node.
can always become a mining node.
can always become a mining node.
can become a mining node, depending if the implementation has the functionality implemented.
can become a mining node, depending if the implementation has the functionality implemented.
Suggested answer: C
asked 16/09/2024
najim faryabi
35 questions

Question 33

Report Export Collapse

On a consortium network:

everybody can become a miner, everybody can send transactions and everything is public.
everybody can become a miner, everybody can send transactions and everything is public.
usually only a few selected nodes can be miners. Transactions can be further limited.
usually only a few selected nodes can be miners. Transactions can be further limited.
Suggested answer: B
asked 16/09/2024
Fronzino Franco
43 questions

Question 34

Report Export Collapse

The JSON-RPC Protocol:

is used to communicate between blockchain nodes.
is used to communicate between blockchain nodes.
is used to ensure safe communication between miners.
is used to ensure safe communication between miners.
is a mean of dumping the blockchain data in a so-called consensus export.
is a mean of dumping the blockchain data in a so-called consensus export.
is used to communicate between the blockchain node and externally running applications.
is used to communicate between the blockchain node and externally running applications.
Suggested answer: D
asked 16/09/2024
Kyle Norton
41 questions

Question 35

Report Export Collapse

GETH:

is the reference implementation of the Ethereum protocol and every other node implementation internally uses the closed-source from Geth.
is the reference implementation of the Ethereum protocol and every other node implementation internally uses the closed-source from Geth.
is the library that is used for the blockchain node Go-Ethereum. It is also used by Parity is parts, because it's closed source.
is the library that is used for the blockchain node Go-Ethereum. It is also used by Parity is parts, because it's closed source.
is one of the many blockchain nodes that implement the Ethereum Protocol. It's open source and everyone can contribute.
is one of the many blockchain nodes that implement the Ethereum Protocol. It's open source and everyone can contribute.
Suggested answer: C
asked 16/09/2024
David Fernando del Villar
46 questions

Question 36

Report Export Collapse

To store almost all data in the Ethereum Blockchain:

a Linked List with pointers to previous blocks hashes is used.
a Linked List with pointers to previous blocks hashes is used.
a Merkle Patricia Trie is used.
a Merkle Patricia Trie is used.
a Radix Trie is used because the Merkle Patricia Trie is too inefficient.
a Radix Trie is used because the Merkle Patricia Trie is too inefficient.
Suggested answer: B
asked 16/09/2024
ABDOUL RAZAK TIENDREBEOGO
30 questions

Question 37

Report Export Collapse

You interact with a smart contract and see a gas usage of 50,000 gas with a gas cost of 15Gwei.

How much Ether would you have to pay to the miner?

750,000,000,000,000 Wei
750,000,000,000,000 Wei
750,000,000,000 Wei
750,000,000,000 Wei
750,000,000 Wei
750,000,000 Wei
A flat fee of 1 Ether
A flat fee of 1 Ether
Suggested answer: A
asked 16/09/2024
Perry Schoenmaker
38 questions

Question 38

Report Export Collapse

Checking the balance of an address inside a loop of a smart contract constantly:

doesn't cost any gas.
doesn't cost any gas.
cost gas every time we check the balance.
cost gas every time we check the balance.
Suggested answer: B
asked 16/09/2024
Komalaharshini Basireddygari
48 questions

Question 39

Report Export Collapse

Gas costs accrue on sending a transaction:

no matter the content.
no matter the content.
only with a new smart contract deployment.
only with a new smart contract deployment.
only interacting with an already deployed smart contract.
only interacting with an already deployed smart contract.
Suggested answer: A
asked 16/09/2024
Michael Crowson
50 questions

Question 40

Report Export Collapse

EVM assembly:

is much better than Solidity and a viable alternative.
is much better than Solidity and a viable alternative.
can be split across multiple files, but every contract must be in a file with the same name as the contract itself.
can be split across multiple files, but every contract must be in a file with the same name as the contract itself.
is another language similar to LLL, more secure than Solidity.
is another language similar to LLL, more secure than Solidity.
Suggested answer: B
asked 16/09/2024
Ero Hiiesalu
43 questions
Total 102 questions
Go to page: of 11
Open VPLUS File
Convert VPLUS to PDF

Related questions

To develop smart contracts:
Integrating the community into your testing:
To get most out of the blockchain, it is best:
Loops in Solidity:
DApps are:
To generate a random number:
Variables of the type address store:
If we divide two integers: 5/2, the result is:
Single line comments in Solidity are:
Solidity gets compiled: