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CBDE Exam Dumps : BTA Certified Blockchain Developer - Ethereum

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BTA Certified Blockchain Developer - Ethereum Questions and Answers

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Question 1

When you are programming a game like poker of battleships where you need to hide opponents values is:

Options:

A.

with private state variables. This way nobody else other than the smart contract itself can see the information

B.

with external contracts holding those values. This way we can make sure that the information flow is following a clear logic and nobody else can access this information.

C.

You can't hide anything on the blockchain, because the information is public, just the call is private which means only other smart contracts would be limited in accessing that information.

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Question 2

What are Ethereum Nodes?

Options:

A.

Programs implementing the Ethereum Protocol to talk to each other and JSON-RPC interfaces to talk to the outside world.

B.

A Java-Script library to compile and run Solidity Code.

C.

A Framework for deploying and running smart contract in a decentralized way.

Question 3

You interact with a smart contract and see a gas usage of 50,000 gas with a gas cost of 15Gwei.

How much Ether would you have to pay to the miner?

Options:

A.

750,000,000,000,000 Wei

B.

750,000,000,000 Wei

C.

750,000,000 Wei

D.

A flat fee of 1 Ether

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