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Blockchain Test

Back to Library

Type

Software Skills

Time

10 minutes

Level

Medium

Questions

12

About the Test

A blockchain Test assesses candidates’ experience and knowledge in 51% attack, Double Spending, Ethereum architecture, and Consensus algorithm and deploying them using blockchain technology for the benefit of an organization.

This online blockchain assessment test is specially curated to identify experienced developers who can design and develop blockchain technologies and basic cryptography essential in crypto marketing and trading. This test also assesses the candidate’s knowledge of the p2p networking system and the creation of blockchain using mining procedures.

Blockchain is a shared, decentralized, encrypted ledger of transactions available for usage from anywhere. With data available to view and process, blockchain is ideal for recording financial transactions. The famous cryptocurrency bitcoin keeps track of its transaction using blockchain technology.

Blockchain developers and engineers today use the most critical data relevant to 51% attack, Double Spending, Ethereum architecture, and the Consensus algorithm. A candidate’s ability to design, structure, and look after the security of the blockchain system will prove to be an added advantage to the organization.

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Skills Measured

  • 51% attack
  • Double Spending
  • Ethereum architecture
  • Consensus algorithm

Roles

  • Blockchain developer
  • Software developer
  • Application developer
  • Blockchain engineer
  • Blockchain project manager
  • Blockchain researcher
  • Blockchain consultant

Recruiting for Blockchain

Job opportunities like blockchain developers, engineers, and general accountants need a detailed understanding of the skills required to design and develop Blockchain technologies. Some other subskills also get measured in this assessment, which is as follows;

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Testlify helps you identify the best talent from anywhere in the world, with a seamless experience that candidates and hiring teams love every step of the way.

1

51% attack

51% of attacks are digital attacks that occur when a malicious actor controls more than half of the mining hashrate on a public blockchain ledger. Test takers with thorough knowledge of blockchain technology can provide better security measures to prevent these sudden attacks.

2

Double spending

Double spending is often an unintentional consequence of blockchain technology. Double spending is when a user spends the same amount twice. This can occur when two or more people send the same amount of cryptocurrency to a single address. Candidates with good results in this test can implement better infrastructure to prevent such mistakes in the blockchain network.

3

Ethereum architecture

Ethereum was designed to be a decentralized platform for applications. Its purpose is to provide developers with a new way to build and deploy applications. It also allows people to run their nodes, the machines that store the blockchain. With the effective implementation of Ethereum, clients can run the EVM and technically write in any popular programming language.

4

Consensus algorithm

The consensus algorithm is the process by which a group of individuals agrees on the validity of transactions in a digital currency system. In blockchain technology, the consensus algorithm ensures that all nodes in the network have the exact copy of the blockchain. This algorithm is handy when it comes to record-keeping across any decentralized ledger.

The test is created by a subject-matter expert

Testlify’s skill tests are designed by experienced SMEs (subject matter experts). We evaluate these experts based on specific metrics such as expertise, capability, and their market reputation. Prior to being published, each skill test is peer-reviewed by other experts and then calibrated based on insights derived from a significant number of test-takers who are well-versed in that skill area. Our inherent feedback systems and built-in algorithms enable our SMEs to refine our tests continually.

View sample score cards

Top five hard skills interview questions for Blockchain

1. Can you explain how blockchain technology works and its key components?
Why this Matters?

Understanding the basics of blockchain technology is essential for any blockchain developer. This question tests the candidate’s knowledge of the underlying technology and its key components.

What to listen for?

Look for evidence that the candidate has a solid understanding of how blockchain technology works, including the role of distributed ledgers, cryptographic hashes, consensus mechanisms, and smart contracts.

2. Can you describe your experience with smart contract development, and how do you ensure the security and correctness of smart contracts?
Why this Matters?

Smart contracts are a key component of blockchain technology and are used to automate business processes. This question tests the candidate’s ability to develop and deploy smart contracts securely.

What to listen for?

Look for evidence that the candidate has experience in smart contract development, can identify potential security vulnerabilities, and can use best practices to ensure the correctness and security of smart contracts.

3. Can you describe your experience with blockchain consensus mechanisms, and how do you choose the right consensus mechanism for a given use case?
Why this Matters?

Consensus mechanisms are essential to the operation of a blockchain network and can impact its performance and security. This question tests the candidate’s ability to select the appropriate consensus mechanism for a given use case.

What to listen for?

Look for evidence that the candidate has experience with various consensus mechanisms, can explain their strengths and weaknesses, and can choose the most appropriate mechanism based on the use case.

4. Can you describe your experience with blockchain security and privacy, and how do you ensure that sensitive data is protected?
Why this Matters?

Security and privacy are critical concerns in any blockchain implementation, especially when dealing with sensitive data. This question tests the candidate’s ability to implement security and privacy measures in a blockchain network.

What to listen for?

Look for evidence that the candidate has experience implementing security and privacy measures in a blockchain network, can identify potential security vulnerabilities, and can use best practices to protect sensitive data.

5. Can you describe your experience with blockchain development tools and frameworks, and how do you stay up to date with the latest developments in the field?
Why this Matters?

Staying up to date with the latest blockchain development tools and frameworks is essential for any blockchain developer. This question tests the candidate’s ability to learn new tools and frameworks and stay up to date with the latest developments in the field.

What to listen for?

Look for evidence that the candidate has experience with various blockchain development tools and frameworks, is familiar with industry-standard tools, and is proactive in learning new tools and frameworks as they emerge.

Frequently Asked Questions for Blockchain

The Blockchain assessment is designed to evaluate a candidate’s ability to manage the architecture, structure, and security of a blockchain system. This assessment may include questions about blockchain technology, the different types of blockchain networks, and best practices for managing and securing a blockchain system.

A Blockchain assessment can assist recruiters in evaluating a candidate’s ability to work with Hyperledger, create, build, and test Blockchain technology.

A blockchain developer is responsible for developing, implementing, and supporting a distributed blockchain-based network. This may involve creating new solutions and documenting them, as well as maintaining and updating existing solutions.

The topics that are covered in the Blockchain assessment are as follows:

  • 51% attack
  • Double Spending
  • Ethereum architecture
  • Consensus algorithm

  • Blockchain developer
  • Software developer
  • Application developer
  • Blockchain engineer
  • Blockchain project manager
  • Blockchain researcher
  • Blockchain consultant

Frequently Asked Questions (FAQs)

Want to know more about Testlify? Here are answers to the most commonly asked questions about our company.

These are ready-made tests, existing in our test library, created by subject matter experts. We have 200+ such skills tests covering various skills from programming skills to DevOps, including Aptitude and Personality testing.

You can go to the ‘Test Library’ tab and search for tests from the Job Role or Test Type drop-down menu.

Currently, we do not offer any sample tests. However, when you select a test, there would be a few practice questions before the start of the actual test, which would give you a fair idea of how the entire test would look.

Our tests typically take between 25-30 minutes to complete.

In case you need to test for a unique skill-set or specialized experience, you can add your own questions and customize the test to suit your requirements.

We’ve put a lot of effort into ensuring a conducive test environment. A stable internet connection, an internet browser with cookies and Java-Script enabled is all that is required!
However, for a smooth test-taking process, we recommend the following browsers:
– Google Chrome
– Internet Expl
– Mozilla Firefox

Yes, our tests are compatible with almost all modern mobile devices (including tablets) that have a webcam installed.

Yes, our tests are EEOC (Equal Employment Opportunity Commission) compliant and are whetted by subject matter experts, thus having high reliability (test consistency) and validity (accuracy of the test).

Yes! We integrate with popular recruiting tools such as Greenhouse, Lever, GoodTime, and many more.

We are GDPR compliant and take data security very seriously. You have complete ownership of your data. All your data is safe and secure, and we do not expose it to any third party.

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