Ethereum Developer Test 6

Question 1

What is TRUE about Go-Ethereum and Ganache

Accepted Answer

Ganache provides an in-memory blockchain simulation, whereas Go-Ethereum provides a genuine blockchain node that allows you to build your own local private network, connect to test networks, and access the main network.

Answer

Ganache is a personal blockchain for Ethereum development, providing an in-memory simulation for rapid testing of smart contracts without connecting to a live network. In contrast, Go-Ethereum (Geth) is a full client implementation that connects to actual Ethereum networks, allowing users to interact with the mainnet, testnets, or create persistent private blockchain networks. This distinction highlights their different use cases for developers.

Question 2

Which eth2 client does Chainsafe support?

Accepted Answer

Lodestar

Answer

Chainsafe is a prominent blockchain development company that actively contributes to the Ethereum ecosystem. They are the development team behind the Lodestar client, which is an Ethereum 2.0 (Consensus Layer) client implementation. Lodestar is written in TypeScript and is designed to be a lightweight and efficient client for the network.

Question 3

Which is TRUE about Ethereum Nodes?

Accepted Answer

Must implement a JSON-RPC for communication with clients and the Ethereum Protocol.

Answer

Ethereum nodes are software applications that adhere to the Ethereum protocol to interact with the blockchain. For external applications like dApps, wallets, or explorers to communicate with these nodes, a standardized interface is essential. This interface is typically a JSON-RPC (Remote Procedure Call) API, which allows clients to send requests and receive data from the node.

Question 4

4) Which is TRUE about Block Timestamp?

Accepted Answer

The timestamp is always independent of the time zone, but it can be slightly modified by a miner.

Answer

Block timestamps on Ethereum are recorded in Unix time (UTC), ensuring they are independent of specific time zones. While miners are generally incentivized to keep timestamps accurate, they possess a small degree of flexibility to adjust the timestamp within a limited range (e.g., a few seconds or minutes). This slight manipulability means timestamps are not entirely secure for generating true randomness on the blockchain.

Question 5

What is a Private Network?

Accepted Answer

A network that only operates in a private area, and prohibits public access

Answer

A private network in the context of blockchain refers to a blockchain instance where access and participation are restricted and require explicit permission. Unlike public blockchains, which are open to anyone, private networks are controlled environments. They are typically used by enterprises or consortia that need a permissioned blockchain for specific business applications and data privacy.

Ethereum Developer Practice Test

Ethereum Developer Practice Test

Ethereum Developer Test 6