BTA Certified Blockchain Developer - Ethereum

Here you have the best Blockchain CBDE practice exam questions

You have 102 total questions to study from
Each page has 5 questions, making a total of 21 pages
You can navigate through the pages using the buttons at the bottom
This questions were last updated on December 8, 2025
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Question 1 of 102

Consensus is reached:

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

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

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

Correct Answer: B

Question 2 of 102

Smart Contracts can be written in:

Java, C++, Solidity and JavaScript, because the Ethereum Blockchain is completely language agnostic and cross compilers exist for every major language.

Solidity, Viper, LLL and Serpent, because those are high level languages that are compiled down to bytecode.

Solidity and JavaScript, because those are the official first implementations for Distributed applications and the Blockchain supports those languages fully.

Correct Answer: B

Question 3 of 102

Solidity gets compiled:

to bytecode that can't be understood by humans.

to bytecodes which are essentially opcodes running instruction by instruction.

Correct Answer: B

Question 4 of 102

Having a bug-bounty program early on:

can help to engage the community in testing your smart contracts and therefore help to find bugs early.

might be a burden as it is an administrative overhead mainly.

is completely useless. Who wants to test beta-ware software? It’s better to start with the bug-bounty program after the contract is released on the main-net.

Correct Answer: A

Question 5 of 102

Which is the right order for Denominations?

Wei, Finney, Szabo, Ether, Tether.

Finney, Szabo, Mether, Gwei.

Gwei, Szabo, Finney, Ether.

Correct Answer: C