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Last Updated: Oct 29, 2026
No. of Questions: 102 Questions & Answers with Testing Engine
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Blockchain CBDE Practice Q&A's
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Blockchain CBDE Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Web3 Integration & Security | 10% | - Secure coding practices - Contract upgradability and maintenance - Web3.js and Ethers.js usage - Common vulnerabilities and mitigation |
| Solidity Programming | 30% | - Events, errors, and exceptions - Inheritance, interfaces, and libraries - Solidity syntax and data types - Smart contract design patterns - Functions, modifiers, and visibility |
| ERC Standards & Tokenization | 20% | - ERC-20 Fungible Tokens - ERC-1155 Multi-Token Standard - Token economics and best practices - ERC-721 Non-Fungible Tokens (NFTs) |
| DApp Development & Deployment | 20% | - Frontend integration patterns - Smart contract testing and debugging - Development tools: Truffle, Hardhat, Ganache - Deployment to testnets and mainnet - Decentralized storage: IPFS |
| Ethereum Architecture & EVM | 20% | - Accounts, addresses, and state model - Ethereum network and node structure - Ethereum Virtual Machine (EVM) fundamentals - Transactions and message calls - Gas mechanics, fees, and optimization |
CBDE Exam Questions Answered
If you are purchasing for a company, take all three versions of Blockchain BTA Certified Blockchain Developer - Ethereum, since different employees study differently. If you are buying for yourself, pick the single version that matches your habits: the PDF for printing and writing on paper, the PC test engine for simulation tests with scored feedback, or the APP online engine for cross-platform use with offline support.
CBDE requires 70% to pass, and the official exam fee is $300 USD. Remember that a retake means paying that fee again, which is why focused preparation matters.
The CBDE exam contains 70 questions within 90 minutes minutes. Rehearsing under the same limit on the ActualTestsQuiz engine builds calm, automatic pacing.
IT certification exams are not cheap, and failing usually means paying the full fee a second time plus losing the hours you already invested. Serious preparation with Blockchain BTA Certified Blockchain Developer - Ethereum exists precisely to prevent that double cost: study the 102 verified questions well, and you give yourself a strong, realistic chance of passing the CBDE exam the first time.
BTA Official Registration: register for CBDE
The package includes 102 practice questions for the CBDE exam, all with verified answers, in PDF, PC test engine, and APP online engine versions.
Recommended: Basic programming knowledge, familiarity with JavaScript, C++, or Python, understanding of blockchain fundamentals
- Solidity Programming (30%)
- Web3 Integration & Security (10%)
- DApp Development & Deployment (20%)
Spend your hours where the weights are highest.
CBDE Official Study Guide: Visit official page
Blockchain BTA Certified Blockchain Developer - Ethereum Sample Questions:
When you do external calls to other smart contracts:
- A. you should follow the checks-effects-interactions pattern and avoid state changes after the call.
- B. you should follow the checks-effects-interactions pattern, which is only necessary when you do calls to contracts where a direct contract call is not possible.
- C. you should follow the effects-checks-interactions pattern and avoid state changes before the call.
Correct Answer: A 🗳️
What's the difference between Ethereum Request for Comments (ERC) and Ethereum Improvement Proposals (EIP)?
- A. ERC are here to propose new distributed applications on top of the Ethereum layer, while EIP are here to improve existing mining software.
- B. ERC are here to define standards for the usage of Ethereum. EIP are here to improve the Ethereum Protocol itself.
- C. ERC are an open platform to discuss continuous forking of the Ethereum platform. Successful forks are then incorporated in the EIP for further voting by the Ethereum Consortium.
Correct Answer: B 🗳️
Transactions containing the same data to create the same smart contract are:
- A. always having the same signature.
- B. having a different signature because of the nonce which changes upon every transaction.
Correct Answer: B 🗳️
What are Ethereum Nodes?
- A. A Java-Script library to compile and run Solidity Code.
- B. Programs implementing the Ethereum Protocol to talk to each other and JSON-RPC interfaces to talk to the outside world.
- C. A Framework for deploying and running smart contract in a decentralized way.
Correct Answer: B 🗳️
Assert is used:
- A. to check internal states that should never happen.
- B. to check input arguments from users.
Correct Answer: A 🗳️
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