Ethereum Interview questions – 2021


Question 1: What is the value token for Ethereum?

ETH (Ether)

Question 2:  What is Ether ?

Ether is a necessary element — a fuel — for operating the distributed application platform Ethereum. It is a form of payment made by the clients of the platform to the machines executing the requested operations.

Question 3: What is the main difference between Ether and Wei ?

Wei is a denomination, like cents to Dollars or pennies to Pounds. 1 ETH = 10¹⁸ Wei.

Question 4: What is the average block size and block time in Ethereum?

Approximated 2 KB and  14 seconds.

Question 5: How can you get Ethers?

Ethers can be obtained in the following ways

  • By Mining
  • Trading Ethers with other currencies
  • Ether faucets

Question 6: How many Ethers were created 2014 during presale ?

60 million were created in a presale in 2014.

Question 7: How many types of Ethereum networks exits ?

There are three types of Ethereum network

  •  Live Network (Main)
  • Test Network (eg. Ropsten and Rinkeby)
  • Private Network

Question 8: What is a node ? Explain.

Node is a computer which is connected to the network to process the transactions.

Question 9: What are the ids of those networks?

  • Live (id=1)
  • Ropsten (id=3)
  • Rinkeby (id=4)
  • Private (assigned by the developer)

Question 10: How do you see details about transactions and blocks?

We can see details of translations and blocks using blockchain explorers like or