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Blockchain CBDE Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Web3 Integration & Security | 10% | - Web3.js and Ethers.js usage - Secure coding practices - Common vulnerabilities and mitigation - Contract upgradability and maintenance |
| Topic 2: ERC Standards & Tokenization | 20% | - Token economics and best practices - ERC-721 Non-Fungible Tokens (NFTs) - ERC-20 Fungible Tokens - ERC-1155 Multi-Token Standard |
| Topic 3: Ethereum Architecture & EVM | 20% | - Transactions and message calls - Ethereum Virtual Machine (EVM) fundamentals - Ethereum network and node structure - Accounts, addresses, and state model - Gas mechanics, fees, and optimization |
| Topic 4: DApp Development & Deployment | 20% | - Decentralized storage: IPFS - Deployment to testnets and mainnet - Development tools: Truffle, Hardhat, Ganache - Smart contract testing and debugging - Frontend integration patterns |
| Topic 5: Solidity Programming | 30% | - Inheritance, interfaces, and libraries - Events, errors, and exceptions - Solidity syntax and data types - Smart contract design patterns - Functions, modifiers, and visibility |
Studying for the Blockchain BTA Certified Blockchain Developer - Ethereum Exam: Answers
Memorizing which option is correct works only until the question is reworded. Understanding the concept behind each CBDE question lets you handle variations with confidence. Take notes as you practice, mark the key points, and your study sessions build real, durable knowledge.
The Blockchain BTA Certified Blockchain Developer - Ethereum practice questions are organized around the official exam objectives. Key topics include:
- Ethereum Architecture & EVM (20%)
- DApp Development & Deployment (20%)
- Solidity Programming (30%)
Questions across these topics span a range of difficulty levels, so both newer and experienced candidates find appropriate challenges.
You can register for the Blockchain BTA Certified Blockchain Developer - Ethereum exam through the official channels:
Is there recommended training for the Blockchain BTA Certified Blockchain Developer - Ethereum exam?
Many candidates combine practice questions with official training. Recommended options include:
The Blockchain BTA Certified Blockchain Developer - Ethereum exam contains 70 questions, and you will have 90 minutes minutes to complete them. Practicing within the same limits builds the pacing the real exam demands.
This package includes 102 practice questions for the Blockchain BTA Certified Blockchain Developer - Ethereum exam. Every answer is verified by an experienced team of experts, so you can trust what you study.
Recommended: Basic programming knowledge, familiarity with JavaScript, C++, or Python, understanding of blockchain fundamentals
You can confirm the current eligibility requirements on the official CBDE exam page before you register.
The Blockchain BTA Certified Blockchain Developer - Ethereum exam requires a score of 70% to pass, and the official registration fee is $300 USD. Because the fee is significant, preparing thoroughly the first time is the practical choice.
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Blockchain BTA Certified Blockchain Developer - Ethereum Sample Questions:
In order to implement an ERC20 token contract, you'd need at least to implement the following functions and events in order to fulfill the interface requirements:
- A. name(), symbol(), totalSupply(), balanceOf(address), ownerOf(uint26),approve(address,uint256), takeOwnership(uint256),transfer(address,uint256),Events: Transfer(address,address,uint256), Approval(address,address,uint256)
- B. totalSupply(), balanceOf(address), allowance(address,address), transfer(address,uint256), approve(address,uint256), transferFrom(address,address,uint256). Events: Transfer(address,address,uint256), Approval(address,address,uint256)
Correct Answer: B 🗳️
Block Difficulty:
- A. is determined by the Ethereum Committee every fortnight to reflect the average amount of transaction and it cannot be influenced by the network itself.
- B. increases when the time between mined blocks is below 20 seconds, while it decreases when the time is above 60 seconds.
- C. increases when the time between mined blocks is below 10 seconds, while it decreases when the time is above 20 seconds.
Correct Answer: C 🗳️
According to the official Style Guide:
- A. contract names should be capitalized, while functions should be mixedCase. You should use 4 spaces as indentation and a maximum of 79 (or 99) characters per line.
- B. contract should be mixedCase, as well as function names. Events should be capitalized. 2 spaces should be used as indentation and a maximum of 120 characters per line.
- C. you should capitalize function names, events and contract names, to avoid confusion with JavaScript. You should use Tabs to indentation and a maximum of 80 characters per line.
Correct Answer: A 🗳️
To compare a String in Solidity you use:
- A. you can't directly compare two strings, but one method would be to hash both strings and compare the hashes.
- B. string1 == string2
- C. bytes32(string1) == bytes32(string2)
- D. the internal function "str_compare(str1,str2)"
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 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.
- C. ERC are here to define standards for the usage of Ethereum. EIP are here to improve the Ethereum Protocol itself.
Correct Answer: C 🗳️
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