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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

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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Question 2

Files can be imported:

Options:

A.

using relative and absolute paths, where the "." And the ".." depict that it's a relative path.

B.

only via GitHub using the Repository and Username.

C.

using the special requirefile(...) statement, which looks in a specific library path to import files.

Question 3

The difference between address.send() and address.transfer() is:

Options:

A.

.send returns a Boolean and .transfer throws an exception on error. Both just forward the gasstipend of 2300 gas and are considered safe against re-entrancy.

B.

.send throws an exception and .transfer returns a Boolean on error. Both just forward the gasstipend of 2300 gas and considered safe against re-entrancy

C.

.send returns a Boolean and .transfer throws an exception on error. .send is considered dangerous, because it sends all gas along, while .transfer only sends the gas stipend of 2300 gas along

D.

.send and .transfer are both considered low-level functions which are dangerous, because they send all gas along. It's better to use address.call.value()() to control the gas-amount.

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