Most Recent Blockchain CBDE Exam Questions & Answers

Prepare for the Blockchain BTA Certified Blockchain Developer - Ethereum exam with our extensive collection of questions and answers. These practice Q&A are updated according to the latest syllabus, providing you with the tools needed to review and test your knowledge.

QA4Exam focus on the latest syllabus and exam objectives, our practice Q&A are designed to help you identify key topics and solidify your understanding. By focusing on the core curriculum, These Questions & Answers helps you cover all the essential topics, ensuring you're well-prepared for every section of the exam. Each question comes with a detailed explanation, offering valuable insights and helping you to learn from your mistakes. Whether you're looking to assess your progress or dive deeper into complex topics, our updated Q&A will provide the support you need to confidently approach the Blockchain CBDE exam and achieve success.

The questions for CBDE were last updated on Dec 21, 2024.

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Question No. 1

Why is it important to follow the same Interfaces?

AWebsites that try to interface with the Token would have to know the exact ABI. It is upfront clear how the interaction has to be with the standard Interfaces.

BThe Ethereum Foundation can easily validate the Tokens and approve any audits by following the standard interface.

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Correct Answer: A

Question No. 2

Truffle:

Ais a framework that helps developers with Testing, Deployment and Management of Smart Contracts and Distributed Applications.

Bis a library that helps developers to connect to Ethereum nodes, because it abstracts the JSONRPC interface.

Cis a framework for Java, similar to Web3.js for JavaScript. It's a great way to develop distributed Java enterprise applications.

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Correct Answer: A

Question No. 3

Single line comments in Solidity are:

Aworking with either // or ///

Bworking with /* comment */ or /** @.. natspec style */

Cnot possible, all comments must be multi-line.

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Correct Answer: A

Question No. 4

What are Ethereum Nodes?

APrograms implementing the Ethereum Protocol to talk to each other and JSON-RPC interfaces to talk to the outside world.

BA Java-Script library to compile and run Solidity Code.

CA Framework for deploying and running smart contract in a decentralized way.

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Correct Answer: A

Question No. 5

When a new block is mined:

Aa 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 by every participating node in the network to achieve consensus.

Ba 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 reached by a special form of hash code.

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Correct Answer: A

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