The exam will test knowledge; preparation tests discipline. In 2026, Lead2Passed supplies the structure for that discipline — 102 practice questions, verified answers, and tools that keep you honest.
Blockchain CBDE Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Web3 Integration & Security | 10% | - Secure coding practices - Common vulnerabilities and mitigation - Contract upgradability and maintenance - Web3.js and Ethers.js usage |
| Topic 2: ERC Standards & Tokenization | 20% | - ERC-721 Non-Fungible Tokens (NFTs) - ERC-1155 Multi-Token Standard - Token economics and best practices - ERC-20 Fungible Tokens |
| Topic 3: Solidity Programming | 30% | - Solidity syntax and data types - Functions, modifiers, and visibility - Events, errors, and exceptions - Inheritance, interfaces, and libraries - Smart contract design patterns |
| Topic 4: DApp Development & Deployment | 20% | - Development tools: Truffle, Hardhat, Ganache - Smart contract testing and debugging - Deployment to testnets and mainnet - Decentralized storage: IPFS - Frontend integration patterns |
| Topic 5: Ethereum Architecture & EVM | 20% | - Transactions and message calls - Ethereum Virtual Machine (EVM) fundamentals - Gas mechanics, fees, and optimization - Ethereum network and node structure - Accounts, addresses, and state model |
CBDE Exam FAQ — Methods, Measurement, Mastery
The Blockchain BTA Certified Blockchain Developer - Ethereum exam contains 70 to complete within 90 minutes. Timed simulation in the Lead2Passed Desktop Test Engine teaches that rhythm before exam day does.
The official Blockchain BTA Certified Blockchain Developer - Ethereum outline defines 5 domains. The leading three are Ethereum Architecture & EVM (20%), Web3 Integration & Security (10%), and ERC Standards & Tokenization (20%). The full list is in the topics section above, and Lead2Passed's 102 practice questions cover each one.
Online proctored exam via BTA student portal Register for the Blockchain BTA Certified Blockchain Developer - Ethereum exam through these official channels:
After booking, Lead2Passed delivers your practice questions within 1 minute — preparation starts the same day.
The CBDE exam is a Blockchain certification exam validating the Blockchain BTA Certified Blockchain Developer - Ethereum syllabus shown above. It belongs to these credential paths: Certified Blockchain Developer - Hyperledger, Certified Blockchain Solution Architect. Candidates in 2026 start with Lead2Passed's 102 practice questions, available as a printable PDF, a Windows Desktop Test Engine, and an Online Test Engine — three versions of the same materials.
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The Blockchain BTA Certified Blockchain Developer - Ethereum exam requires 70% to pass, and registration costs $300 USD. A failed attempt means paying the same fee again — a readiness check with the Lead2Passed engines before booking is the cheaper option.
Recommended: Basic programming knowledge, familiarity with JavaScript, C++, or Python, understanding of blockchain fundamentals Since requirements change over time, confirm the latest on the official Blockchain exam page before scheduling.
Blockchain recommends these training resources for the Blockchain BTA Certified Blockchain Developer - Ethereum exam:
Follow the training with steady self-testing — the 102 practice questions from Lead2Passed help you apply theory and fill any gaps the training leaves.
Three versions of the same study materials: a printable, expert-prepared PDF with free demo download and instant access; a Desktop Test Engine for Windows with customizable simulation and timed modes that works offline; and an Online Test Engine for any browser on Windows, Mac, Android, and iOS with test history and performance review. All 102 practice questions are identical across versions. Every purchase includes 365 days of free updates, a 50% renewal discount afterward, and unlimited computer installations.
Blockchain BTA Certified Blockchain Developer - Ethereum Sample Questions:
When using require to check input parameters and it evaluates to false:
- A. all remaining gas is returned.
- B. all gas is consumed
Correct Answer: A 🗳️
The JSON-RPC Protocol:
- A. is a mean of dumping the blockchain data in a so-called consensus export.
- B. is used to communicate between blockchain nodes.
- C. is used to ensure safe communication between miners.
- D. is used to communicate between the blockchain node and externally running applications.
Correct Answer: D 🗳️
Hashing Mining uses:
- A. the Dagger-Hashimoto hashing while internally the EVM uses Keccack256 which is almost similar to SHA256, but has a different padding so produces different hashes.
- B. Keccack256 while internally to hash values it's easy to use the Dagger-Hashimoto to create a meaningful hash.
- C. the Dagger-Hashimoto hashing while internally the EVM uses SHA256 which is an alias for Keccack256.
Correct Answer: A 🗳️
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?
- A. 750,000,000 Wei
- B. 750,000,000,000 Wei
- C. 750,000,000,000,000 Wei
- D. A flat fee of 1 Ether
Correct Answer: C 🗳️
Smart Contracts can be written in:
- A. Solidity and JavaScript, because those are the official first implementations for Distributed applications and the Blockchain supports those languages fully.
- B. Solidity, Viper, LLL and Serpent, because those are high level languages that are compiled down to bytecode.
- C. Java, C++, Solidity and JavaScript, because the Ethereum Blockchain is completely language agnostic and cross compilers exist for every major language.
Correct Answer: B 🗳️
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