Free Online Blockchain CBDE Practice Test

Prepare Your Blockchain CBDE Exam Questions with Free online CBDE Practice Test. Get Brilliant BTA Certified Blockchain Developer - Ethereum Exam Results with Valid CBDE Exam Dumps.

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Total 102 Questions | Updated On: May 13, 2024

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Question 1

When using assert to check invariants and it evaluates to false:

A : all gas is consumed.

B : all remaining gas is returned

Answer: A

Question 2

When defining a new datatype:

A : its best to use a contract with public storage variables, so it can be used like a class

B : it's best to use a struct, which is cheaper than deploying a new contract

C : it's not possible to generate new datatypes in Solidity

Answer: B

Question 3

The JSON-RPC Protocol:

A : is used to communicate between blockchain nodes

B : is used to ensure safe communication between miners

C : is a mean of dumping the blockchain data in a so-called consensus export

D : is used to communicate between the blockchain node and externally running applications

Answer: D

Question 4

The Fallback function:

A : cannot receive Ether, not even by adding the payable modifier

B : can contain as much logic as you want, but it’s better to keep it short and not exceed the gas stipend of 2300 gas

C : can be used to avoid receiving ether

Answer: B

Question 5

It’s possible to access the blockchain via an Ethereum Node:

A : only via JavaScript because there is the proprietary Web3.js library.

B : by any programming language, as long as it adheres to the JSON-RPC standard.

Answer: B

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Total 102 Questions | Updated On: May 13, 2024

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