Top 50 Blockchain Interview Questions (Most Expected)

Blockchain Interview Questions(FAQ) | Most Expected Blockchain Interview Questions | Top 50 Blockchain Interview Questions and Answers

Blockchain Interview Questions

1. Explain the concept of the Blockchain?
2. Differentiate between Blockchain and Hyperledger?
3. What is the principle on which blockchain technology is based on?
4. How would you explain Blockchain Technology to someone who doesn't know it?
5. What is cryptography?
6. What are the different types of Blockchains?
7. Why the Blockchain is trustable?
8. Explain the Blockchain mechanism with an example?
9. What are the common records kept in a Blockchain?
10. What is the use of Merkel tree in Blockchain technology? 
11. What do you mean by blocks in the Blockchain technology? 
12. How is Blockchain distributed ledger different from a traditional ledger? 
13. How can you identify a block? 
14. What is cryptography? What is its role in Blockchain? 
15. What are the different types of Blockchains?
16. What is meant by mining software?
17. What are the different types of mining software you know? 
18. What happens when you try to deploy a file with multiple contracts?
19. How Blockchain has differed from the traditional database?
20. How bitcoin uses Blockchain?
21. What is a Genesis block? 
22. How is the hash (Block signature) generated?
23. List down some of the widely used cryptographic algorithms?
24. What is the difference between on-chain and off-chain transactions?
25. What is anonymity and pseudonymity in Cryptocurrency?  
26. What is the role of encryption in Blockchain Technology?
27. What does the term Block represent in Blockchain?
28. What is a smart contract and list some of its applications?
29. What is Ethereum network and how many Ethereum networks are you familiar with?
30. What is the difference between Ethereum and Hyperledger Fabric?
31. Where do nodes run smart contract code? 
32. What is the difference between a smart contract and Dapps?
33. What is Dapp and how is it different from a normal application?
34. Name some leading open source platforms for developing Blockchain applications?
35. What is the very first thing you must specify in a solidity file? 
36. What is the difference between Bitcoin and Ethereum?
37. What kind of network is suitable to use Blockchain technology in an Organization?
38. What is nonce and how is it used in mining?
39. Name the steps that are involved in the Blockchain project implementation?
40. Explain a real-life use case where Blockchain is being used?
41. List and explain the parts of EVM memory?
42. What is 51% attack? 
43. What are Blind Signatures? 
44. What is a secret sharing?
45. What happens if the execution of a smart contract costs more than the specified gas?
46. What does the gas usage in a transaction depend on and how is transaction fee calculated?
47. What is a fork? What are some of the types of forking? 
48. Differentiate between proof of work vs proof of stake? 
49. What are function modifiers in solidity and mention the most widely used modifiers? 
50. What are the benefits and limitations of Blockchain?