PwC Blockchain Developer Interview Questions, Process, and Tips

The complete lifecycle for a blockchain transaction involves creation, validation, broadcast, inclusion in a block, and confirmation.

• Creation of transaction by sender

• Validation of transaction by network nodes

• Broadcasting of transaction to network

• Inclusion of transaction in a block by miners

• Confirmation of transaction by consensus of network nodes

Yes, you can publish your own custom blockchain by following these steps.

• Define the purpose and requirements of your custom blockchain

• Choose a consensus mechanism (e.g. Proof of Work, Proof of Stake)

• Select a suitable blockchain platform (e.g. Ethereum, Hyperledger)

• Develop and deploy the custom blockchain network

• Test the network for functionality and security

• Launch and promote your custom blockchain to attract users and

Gas for a transaction is estimated based on the computational resources required to execute the transaction on the blockchain network.

• Gas is a unit used to measure the computational work required to process transactions on the blockchain.

• Gas cost is determined by the complexity of the transaction and the amount of data being processed.

• Developers can estimate gas by using tools like the Ethereum Gas Station or by simula...read more

Proof of work requires miners to solve complex mathematical puzzles to validate transactions, while proof of stake selects validators based on the amount of cryptocurrency they hold.

• Proof of work involves miners solving complex mathematical puzzles to validate transactions

• Proof of stake selects validators based on the amount of cryptocurrency they hold

• Proof of work is energy-intensive and requires significant computati...read more

Yes, inheritance is possible in Solidity.

• Solidity supports inheritance, allowing one contract to inherit properties and methods from another.

• Inheritance is achieved using the 'is' keyword followed by the name of the base contract.

• Child contracts can access the functions and variables of the parent contract.

• Multiple inheritance is also supported in Solidity.