Blockchain 101 Certification — Questions and Answers

Question 1: In Blockchain 101, which data management & integration approach is MOST effective for achieving long-term goals?

Strategic planning with measurable objectives and regular progress reviews (Correct answer)
Delegating all decisions without oversight
Focusing solely on short-term financial targets
Reactive management that addresses issues as they arise

Correct answer: Strategic planning with measurable objectives and regular progress reviews

Strategic planning with measurable objectives and regular reviews provides direction, accountability, and the ability to adapt strategies based on progress.

Question 2: What is 'gas' in the context of Ethereum smart contracts?

A native token separate from Ether
A consensus reward mechanism
A measure of computational effort required to execute operations, paid in Ether (Correct answer)
A smart contract language feature

Correct answer: A measure of computational effort required to execute operations, paid in Ether

Gas quantifies the computation cost of each EVM operation, and users pay gas fees in Ether to compensate validators for executing their transactions.

Question 3: What is the MOST effective way to stay current with developments in implementation & configuration for Blockchain 101?

Participating in professional development, industry events, and peer collaboration (Correct answer)
Following a single expert opinions
Reading only internal communications
Relying on experience gained early in career

Correct answer: Participating in professional development, industry events, and peer collaboration

A multi-faceted approach including formal development, industry events, and peer collaboration provides the broadest perspective on current developments.

Question 4: Which Ethereum token standard is most commonly used for creating fungible tokens like cryptocurrencies and utility tokens?

ERC-1155
ERC-20 (Correct answer)
ERC-721
ERC-777

Correct answer: ERC-20

ERC-20 is the most widely adopted Ethereum standard for fungible tokens, defining a common interface for transfer, approval, and balance querying.

Question 5: In blockchain consensus, what is 'liveness'?

The speed of transaction finality
The ability of a network to always add new valid blocks (Correct answer)
The latency between nodes
The number of active nodes

Correct answer: The ability of a network to always add new valid blocks

Liveness guarantees that the system continues making progress and new transactions will eventually be confirmed.

Question 6: When troubleshooting system architecture & design issues in Blockchain 101, what is the BEST approach?

Escalating immediately without initial investigation
Making multiple changes simultaneously to save time
Systematic diagnosis starting with the most likely causes and documenting steps (Correct answer)
Restarting systems without investigating the root cause

Correct answer: Systematic diagnosis starting with the most likely causes and documenting steps

Systematic diagnosis with documentation ensures efficient problem resolution and prevents recurrence by addressing root causes.

Question 7: What is the Ethereum Virtual Machine (EVM)?

An off-chain computation engine
A hardware wallet for Ether
A cloud server hosting Ethereum nodes
A sandboxed runtime that executes smart contract bytecode on every Ethereum node (Correct answer)

Correct answer: A sandboxed runtime that executes smart contract bytecode on every Ethereum node

The EVM is a deterministic stack-based virtual machine that executes smart contract bytecode consistently across all Ethereum nodes.

Question 8: When implementing data management & integration changes in Blockchain 101, what factor is MOST critical?

Minimizing communication about the changes
Speed of implementation regardless of preparation
Stakeholder buy-in and a clear change management plan (Correct answer)
Top-down mandate without input from affected parties

Correct answer: Stakeholder buy-in and a clear change management plan

Stakeholder buy-in and a structured change management plan significantly increase the likelihood of successful implementation.

Question 9: What is the primary difference between a hot wallet and a cold wallet?

Hot wallets are connected to the internet; cold wallets are kept offline (Correct answer)
Hot wallets support NFTs; cold wallets only support fungible tokens
Hot wallets use public keys; cold wallets use private keys only
Hot wallets store tokens on exchanges; cold wallets store tokens in smart contracts

Correct answer: Hot wallets are connected to the internet; cold wallets are kept offline

Hot wallets maintain an active internet connection making them convenient but more vulnerable, while cold wallets are stored offline providing greater security.

Question 10: What does it mean for a smart contract to be 'immutable'?

It only runs on private blockchains
It cannot process more than one transaction
Its deployed code cannot be changed after deployment (Correct answer)
It does not store state variables

Correct answer: Its deployed code cannot be changed after deployment

Once deployed on-chain, smart contract code is permanently stored and cannot be altered, requiring proxy patterns or new deployments for upgrades.

Question 11: In Blockchain 101, how should data management & integration challenges be prioritized?

Based solely on cost considerations
By the preferences of senior management
Based on potential impact, urgency, and alignment with strategic objectives (Correct answer)
In the order they were identified

Correct answer: Based on potential impact, urgency, and alignment with strategic objectives

Prioritizing based on impact, urgency, and strategic alignment ensures resources are directed where they will produce the greatest benefit.

Question 12: What is the process of creating new tokens and adding them to a blockchain called?

Staking
Minting (Correct answer)
Burning
Forking

Correct answer: Minting

Minting is the process by which new tokens are generated and recorded on the blockchain, increasing the total supply.

Question 13: In Blockchain 101, which system architecture & design practice BEST ensures system reliability?

Running systems until failure occurs
Relying on a single point of contact for all technical issues
Implementing redundancy, regular testing, and documented recovery procedures (Correct answer)
Updating systems only when vendors release patches

Correct answer: Implementing redundancy, regular testing, and documented recovery procedures

Redundancy, regular testing, and documented recovery procedures create a robust environment that minimizes downtime and data loss.

Question 14: How does ERC-721 differ from ERC-20?

ERC-721 tokens are non-fungible, each with a unique ID; ERC-20 tokens are interchangeable (Correct answer)
ERC-721 tokens are fungible; ERC-20 tokens are not
ERC-721 uses Proof of Work; ERC-20 uses Proof of Stake
ERC-721 is for governance; ERC-20 is for payments

Correct answer: ERC-721 tokens are non-fungible, each with a unique ID; ERC-20 tokens are interchangeable

ERC-721 tokens each have a unique token ID making them non-fungible, unlike ERC-20 where each unit is identical and interchangeable.

Question 15: Which consensus algorithm uses a 'leader election' process to designate one node to propose each block?

Proof of Burn
Raft Consensus (Correct answer)
Proof of Elapsed Time
Proof of Work

Correct answer: Raft Consensus

Raft Consensus elects a single leader node to manage log replication and propose new entries to the cluster.

Question 16: What is the BEST approach to documentation & best practices standardization in Blockchain 101?

Standardizing only external-facing documents
Implementing consistent formats, terminology, and processes across the organization (Correct answer)
Using whatever format is most convenient at the time
Allowing each department to create its own standards

Correct answer: Implementing consistent formats, terminology, and processes across the organization

Organization-wide consistency in formats, terminology, and processes ensures data can be shared, compared, and analyzed effectively.

Question 17: How is a blockchain transaction cryptographically authorized before broadcasting?

The transaction is co-signed by the blockchain's founding organization
The receiving wallet generates a one-time approval code sent via SMS
The transaction data is hashed and signed with the sender's private key (Correct answer)
The sender emails confirmation to the receiving node operator

Correct answer: The transaction data is hashed and signed with the sender's private key

Transactions are authorized by hashing the transaction data and applying an asymmetric digital signature using the sender's private key, which nodes can verify using the corresponding public key.

Question 18: What is the PRIMARY objective of automation & scripting within the Blockchain 101 profession?

To create additional requirements for practitioners
To ensure quality outcomes through standardized practices and continuous improvement (Correct answer)
To maintain the status quo without change
To limit the scope of professional activities

Correct answer: To ensure quality outcomes through standardized practices and continuous improvement

The primary objective is ensuring quality outcomes through established standards while continuously improving practices and processes.

Question 19: What is the purpose of an 'event' in a Solidity smart contract?

To emit a log entry stored on the blockchain that external applications can listen to (Correct answer)
To trigger automatic contract execution
To call other contracts
To handle exceptions

Correct answer: To emit a log entry stored on the blockchain that external applications can listen to

Events emit indexed log entries on the blockchain that off-chain applications and frontends can subscribe to for real-time state change notifications.

Question 20: In Delegated Proof of Stake (DPoS), who actually validates transactions?

Anonymous miners
Only the blockchain founder
All token holders simultaneously
A small number of elected delegates (Correct answer)

Correct answer: A small number of elected delegates

In DPoS, token holders vote to elect a limited set of delegates who are responsible for validating transactions and producing blocks.

Question 21: What is a 'reentrancy attack' in smart contract security?

A replay attack on signed transactions
Calling a function twice in the same transaction to double fees
A bug that prevents contract deployment
An external contract recursively calling back into the vulnerable contract before the first execution completes (Correct answer)

Correct answer: An external contract recursively calling back into the vulnerable contract before the first execution completes

A reentrancy attack exploits a contract that sends Ether before updating its state, allowing the recipient contract to re-enter and drain funds.

Question 22: How should documentation & best practices retention policies be determined in Blockchain 101?

Based on available storage space
Based on legal requirements, operational needs, and industry best practices (Correct answer)
Keeping everything indefinitely
Destroying records as soon as they are no longer immediately needed

Correct answer: Based on legal requirements, operational needs, and industry best practices

Retention policies should balance legal requirements, operational needs, and best practices to ensure appropriate preservation and disposal.

Question 23: Which consensus protocol is commonly used in permissioned enterprise blockchains like Hyperledger Fabric?

Proof of Burn
Practical Byzantine Fault Tolerance (PBFT) (Correct answer)
Proof of Work
Nakamoto Consensus

Correct answer: Practical Byzantine Fault Tolerance (PBFT)

PBFT is widely used in permissioned blockchains because it achieves consensus among known, trusted nodes without energy-intensive mining.

Question 24: What is 'front-running' in DApp transactions?

Observing pending transactions in the mempool and inserting a competing transaction with higher gas to execute first (Correct answer)
Sending duplicate transactions
Running a contract before it is deployed
Skipping transaction signature verification

Correct answer: Observing pending transactions in the mempool and inserting a competing transaction with higher gas to execute first

Front-running exploits the public mempool by submitting a higher-fee transaction based on another user's pending transaction to gain a profit.

Question 25: In Blockchain 101, how does security & access control contribute to professional credibility?

By avoiding challenging situations
Through the number of years in practice alone
By using impressive terminology
By demonstrating competence, maintaining standards, and delivering consistent results (Correct answer)

Correct answer: By demonstrating competence, maintaining standards, and delivering consistent results

Professional credibility is built through demonstrated competence, consistent adherence to standards, and reliable delivery of quality results.

Question 26: Which metric BEST indicates successful data management & integration in Blockchain 101?

Number of meetings held per week
Achievement of defined key performance indicators and stakeholder satisfaction (Correct answer)
Volume of emails sent
Hours worked by team members

Correct answer: Achievement of defined key performance indicators and stakeholder satisfaction

KPI achievement and stakeholder satisfaction directly measure whether management activities are producing desired outcomes.

Question 27: What is an ABI (Application Binary Interface) in Ethereum development?

A JSON specification describing how to interact with a deployed smart contract (Correct answer)
A wallet encryption standard
An identity protocol
A block serialization format

Correct answer: A JSON specification describing how to interact with a deployed smart contract

The ABI defines the contract's functions, parameters, and return types so external applications know how to encode calls to the contract.

Question 28: What is the PRIMARY objective of security & access control within the Blockchain 101 profession?

To create additional requirements for practitioners
To ensure quality outcomes through standardized practices and continuous improvement (Correct answer)
To maintain the status quo without change
To limit the scope of professional activities

Correct answer: To ensure quality outcomes through standardized practices and continuous improvement

The primary objective is ensuring quality outcomes through established standards while continuously improving practices and processes.

Question 29: Which factor BEST indicates mastery of security & access control in Blockchain 101?

Number of certifications held
Speed of task completion
The ability to adapt knowledge and skills to varying contexts while maintaining standards (Correct answer)
Years of experience in a single setting

Correct answer: The ability to adapt knowledge and skills to varying contexts while maintaining standards

True mastery is demonstrated by the ability to apply knowledge flexibly across different contexts while consistently maintaining quality standards.

Question 30: What is a Hierarchical Deterministic (HD) wallet?

A wallet that requires multiple signatures to approve any transaction
A wallet that generates a tree of key pairs from a single master seed (Correct answer)
A wallet that automatically swaps tokens to maintain a fixed portfolio ratio
A wallet specifically designed for institutional custody of digital assets

Correct answer: A wallet that generates a tree of key pairs from a single master seed

HD wallets (BIP-32) derive an unlimited number of child key pairs from a single master seed, allowing easy backup and recovery of all addresses.

Question 31: When facing an unfamiliar challenge in implementation & configuration within Blockchain 101, what is the BEST approach?

Attempt to resolve it independently without consultation
Avoid the challenge if possible
Apply the most familiar technique regardless of suitability
Research established best practices, consult colleagues, and document the approach (Correct answer)

Correct answer: Research established best practices, consult colleagues, and document the approach

Researching best practices and consulting colleagues combines established knowledge with practical experience, while documentation supports future reference.

Question 32: What distinguishes a 'soft fork' from a 'hard fork' in blockchain protocol upgrades?

Soft forks require all nodes to upgrade; hard forks do not
Soft forks are temporary; hard forks are permanent
Soft forks are backward-compatible; hard forks are not (Correct answer)
Soft forks change block size; hard forks change consensus rules

Correct answer: Soft forks are backward-compatible; hard forks are not

A soft fork introduces tighter rules that old nodes still accept, while a hard fork creates incompatible rules requiring all nodes to upgrade.

Question 33: In Blockchain 101, how should sensitive documentation & best practices be protected?

By limiting all access to one person
By avoiding digital storage entirely
Through password protection alone
Through role-based access controls, encryption, and compliance with privacy regulations (Correct answer)

Correct answer: Through role-based access controls, encryption, and compliance with privacy regulations

Multi-layered protection through access controls, encryption, and regulatory compliance provides comprehensive security for sensitive data.

Question 34: Which documentation & best practices practice is MOST critical for maintaining data integrity in Blockchain 101?

Manual data entry without verification
Standardized input procedures with validation checks and regular audits (Correct answer)
Storing data in multiple disconnected systems
Allowing unrestricted access to modify records

Correct answer: Standardized input procedures with validation checks and regular audits

Standardized procedures with validation and audits ensure data remains accurate, consistent, and trustworthy.

Question 35: What is the PRIMARY benefit of continuous improvement in data management & integration for Blockchain 101?

Reduced need for employee input
Higher operational costs in the short term
Enhanced efficiency, quality, and competitive advantage over time (Correct answer)
Increased complexity in operations

Correct answer: Enhanced efficiency, quality, and competitive advantage over time

Continuous improvement systematically enhances efficiency and quality, leading to sustained competitive advantage.

Question 36: Which competency is MOST essential for professionals working in automation & scripting in Blockchain 101?

Critical thinking combined with practical application of knowledge (Correct answer)
Speed of task completion above all else
Seniority-based decision making
Memorization of procedures without understanding principles

Correct answer: Critical thinking combined with practical application of knowledge

Critical thinking allows professionals to apply knowledge effectively in varied situations, leading to better outcomes than rote procedures.

Question 37: What is 'flash loan' functionality in DeFi smart contracts?

A small gas-free microtransaction
A cross-chain asset transfer
An uncollateralized loan borrowed and repaid within the same blockchain transaction (Correct answer)
A loan with instant interest calculation

Correct answer: An uncollateralized loan borrowed and repaid within the same blockchain transaction

Flash loans allow anyone to borrow large amounts without collateral as long as the principal plus fee is returned within the same atomic transaction.

Question 38: When facing an unfamiliar challenge in automation & scripting within Blockchain 101, what is the BEST approach?

Avoid the challenge if possible
Apply the most familiar technique regardless of suitability
Research established best practices, consult colleagues, and document the approach (Correct answer)
Attempt to resolve it independently without consultation

Correct answer: Research established best practices, consult colleagues, and document the approach

Researching best practices and consulting colleagues combines established knowledge with practical experience, while documentation supports future reference.

Question 39: What is the MOST effective way to stay current with developments in cloud infrastructure & services for Blockchain 101?

Reading only internal communications
Relying on experience gained early in career
Following a single expert opinions
Participating in professional development, industry events, and peer collaboration (Correct answer)

Correct answer: Participating in professional development, industry events, and peer collaboration

A multi-faceted approach including formal development, industry events, and peer collaboration provides the broadest perspective on current developments.

Question 40: Which competency is MOST essential for professionals working in troubleshooting & problem resolution in Blockchain 101?

Seniority-based decision making
Speed of task completion above all else
Memorization of procedures without understanding principles
Critical thinking combined with practical application of knowledge (Correct answer)

Correct answer: Critical thinking combined with practical application of knowledge

Critical thinking allows professionals to apply knowledge effectively in varied situations, leading to better outcomes than rote procedures.

Question 41: What is a proxy pattern in smart contract development?

A caching mechanism for contract calls
A pattern for encrypting contract storage
A design that separates upgradeable logic from persistent storage to allow contract upgrades (Correct answer)
A pattern for batching multiple transactions

Correct answer: A design that separates upgradeable logic from persistent storage to allow contract upgrades

The proxy pattern routes calls through a proxy contract to a logic contract, allowing the logic to be upgraded by pointing to a new implementation.

Question 42: Which consensus mechanism requires participants to solve computationally intensive puzzles to validate transactions?

Proof of Authority
Delegated Proof of Stake
Proof of Work (Correct answer)
Proof of Stake

Correct answer: Proof of Work

Proof of Work (PoW) requires miners to expend computational energy solving cryptographic puzzles to add blocks to the chain.

Question 43: What is 'Proof of Burn' consensus?

Destroying computing hardware to prove work
Burning gas fees for priority
Sending cryptocurrency to an unspendable address to earn mining rights (Correct answer)
Destroying tokens to reduce supply

Correct answer: Sending cryptocurrency to an unspendable address to earn mining rights

In Proof of Burn, participants send coins to a verifiably unspendable address, sacrificing value to earn the right to mine proportional blocks.

Question 44: What is the PRIMARY benefit of standardizing system architecture & design practices in Blockchain 101?

Increasing dependency on specific vendors
Limiting innovation and creativity
Reducing the number of tools available
Consistency, easier maintenance, and improved collaboration among team members (Correct answer)

Correct answer: Consistency, easier maintenance, and improved collaboration among team members

Standardization promotes consistency across the organization, simplifies maintenance, and enables better collaboration between team members.

Question 45: Which factor MOST impacts the usefulness of documentation & best practices outputs in Blockchain 101?

Complexity of the analysis
Format and visual presentation only
Volume of data collected
Timeliness, accuracy, and relevance to the intended audience (Correct answer)

Correct answer: Timeliness, accuracy, and relevance to the intended audience

Information is most useful when it is timely, accurate, and relevant to the needs of the people who will use it.

Question 46: In Blockchain 101, how does implementation & configuration contribute to professional credibility?

By using impressive terminology
Through the number of years in practice alone
By avoiding challenging situations
By demonstrating competence, maintaining standards, and delivering consistent results (Correct answer)

Correct answer: By demonstrating competence, maintaining standards, and delivering consistent results

Professional credibility is built through demonstrated competence, consistent adherence to standards, and reliable delivery of quality results.

Question 47: What is the '51% attack' in blockchain security?

When 51 blocks are orphaned
When a node rejects 51% of transactions
When 51% of users abandon the network
When an attacker controls the majority of mining/staking power (Correct answer)

Correct answer: When an attacker controls the majority of mining/staking power

A 51% attack occurs when a single entity controls more than half of the network's consensus power, enabling transaction manipulation.

Question 48: Which factor BEST indicates mastery of automation & scripting in Blockchain 101?

The ability to adapt knowledge and skills to varying contexts while maintaining standards (Correct answer)
Number of certifications held
Years of experience in a single setting
Speed of task completion

Correct answer: The ability to adapt knowledge and skills to varying contexts while maintaining standards

True mastery is demonstrated by the ability to apply knowledge flexibly across different contexts while consistently maintaining quality standards.

Question 49: In Blockchain 101, how does automation & scripting contribute to professional credibility?

By using impressive terminology
Through the number of years in practice alone
By demonstrating competence, maintaining standards, and delivering consistent results (Correct answer)
By avoiding challenging situations

Correct answer: By demonstrating competence, maintaining standards, and delivering consistent results

Professional credibility is built through demonstrated competence, consistent adherence to standards, and reliable delivery of quality results.

Question 50: What is an oracle in the context of smart contracts?

A service that provides real-world external data to smart contracts (Correct answer)
A consensus algorithm validator
A blockchain audit tool
A smart contract testing framework

Correct answer: A service that provides real-world external data to smart contracts

Oracles bridge the on-chain and off-chain worlds by feeding external data (prices, weather, events) into smart contracts that cannot access the internet directly.

Question 51: In DeFi (Decentralized Finance), what is a liquidity pool?

A consortium of banks that provide fiat on-ramps for crypto users
A cold-storage vault shared between multiple exchanges to reduce hack risk
A reserve of funds locked by a government to back a national digital currency
A smart contract holding reserves of two or more tokens that enables automated trading and yields (Correct answer)

Correct answer: A smart contract holding reserves of two or more tokens that enables automated trading and yields

A liquidity pool is a smart contract containing token reserves contributed by liquidity providers, enabling decentralized exchanges to facilitate trades without traditional order books.

Question 52: What is the MOST important skill for effective data management & integration in Blockchain 101?

Avoiding conflict at all costs
Technical expertise alone without people skills
Clear communication and the ability to align team efforts with objectives (Correct answer)
Maintaining strict authority over all decisions

Correct answer: Clear communication and the ability to align team efforts with objectives

Clear communication is essential for aligning team efforts, building consensus, and ensuring everyone understands and works toward shared objectives.

Question 53: What is the PRIMARY benefit of standardizing network design & administration practices in Blockchain 101?

Reducing the number of tools available
Increasing dependency on specific vendors
Consistency, easier maintenance, and improved collaboration among team members (Correct answer)
Limiting innovation and creativity

Correct answer: Consistency, easier maintenance, and improved collaboration among team members

Standardization promotes consistency across the organization, simplifies maintenance, and enables better collaboration between team members.

Question 54: What does the term 'uncle block' (ommer block) refer to in Ethereum?

The block preceding the genesis block
A valid block that was mined simultaneously but not included in the main chain (Correct answer)
A duplicate transaction block
An invalid block rejected by all nodes

Correct answer: A valid block that was mined simultaneously but not included in the main chain

Uncle blocks are valid blocks mined at the same time as the canonical block but not included in the main chain; Ethereum rewards miners for them to reduce centralization.

Question 55: In a Proof of Stake consensus model, what determines a validator's chance of being selected to create the next block?

Number of transactions processed
Hash rate
Amount of staked cryptocurrency (Correct answer)
Network latency

Correct answer: Amount of staked cryptocurrency

In PoS, validators are chosen to propose new blocks proportionally based on the amount of cryptocurrency they have staked as collateral.

Question 56: What is the PRIMARY purpose of documentation & best practices in Blockchain 101?

To create paperwork for filing purposes
To limit access to information
To provide accurate, accessible information for decision-making and compliance (Correct answer)
To satisfy audit requirements only

Correct answer: To provide accurate, accessible information for decision-making and compliance

Data and documentation exist primarily to provide accurate, accessible information that supports both decision-making and regulatory compliance.

Question 57: How should system architecture & design upgrades be managed in a Blockchain 101 environment?

By upgrading all systems simultaneously without staging
Through a structured change management process with testing and rollback plans (Correct answer)
By implementing changes immediately without testing
Only during business hours for maximum visibility

Correct answer: Through a structured change management process with testing and rollback plans

A structured change management process with testing and rollback plans minimizes risk and ensures upgrades do not disrupt operations.

Question 58: Which characteristic BEST describes a successful performance monitoring & optimization culture in Blockchain 101?

Continuous learning where all team members actively seek improvement (Correct answer)
Focus on compliance over genuine improvement
Periodic campaigns without sustained effort
Top-down directives without employee input

Correct answer: Continuous learning where all team members actively seek improvement

A culture where all team members actively seek improvement opportunities creates sustainable quality enhancement across the organization.

Question 59: What is the MOST effective way to stay current with developments in automation & scripting for Blockchain 101?

Relying on experience gained early in career
Following a single expert opinions
Reading only internal communications
Participating in professional development, industry events, and peer collaboration (Correct answer)

Correct answer: Participating in professional development, industry events, and peer collaboration

A multi-faceted approach including formal development, industry events, and peer collaboration provides the broadest perspective on current developments.

Question 60: What is Intel's Proof of Elapsed Time (PoET) consensus designed for?

IoT device networks
Mobile blockchain applications
Permissioned blockchains using trusted execution environments (Correct answer)
Public blockchains with anonymous miners

Correct answer: Permissioned blockchains using trusted execution environments

PoET is designed for permissioned blockchain networks and uses Intel SGX trusted hardware to fairly elect block producers via random wait timers.

Blockchain 101 Certification

An entry-level blockchain certification covering foundational concepts including consensus mechanisms, smart contracts, DApps, data management, automation, and project deployment. Designed for professionals seeking to validate core blockchain knowledge and skills.

Questions

90 min

Time Limit

70%

To Pass

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